CN110095318A - Utilize the sample collecting apparatus and acquisition method of radioactive krypton isotope measurement seawater apparent age - Google Patents
Utilize the sample collecting apparatus and acquisition method of radioactive krypton isotope measurement seawater apparent age Download PDFInfo
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- CN110095318A CN110095318A CN201910461308.9A CN201910461308A CN110095318A CN 110095318 A CN110095318 A CN 110095318A CN 201910461308 A CN201910461308 A CN 201910461308A CN 110095318 A CN110095318 A CN 110095318A
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- 239000013535 sea water Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000002285 radioactive effect Effects 0.000 title claims abstract description 14
- 229910052743 krypton Inorganic materials 0.000 title claims abstract description 12
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 238000005259 measurement Methods 0.000 title claims abstract description 10
- 239000007789 gas Substances 0.000 claims abstract description 113
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 93
- 239000007788 liquid Substances 0.000 claims abstract description 92
- 238000003860 storage Methods 0.000 claims abstract description 87
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 43
- 238000005070 sampling Methods 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 229910001220 stainless steel Inorganic materials 0.000 claims description 10
- 239000010935 stainless steel Substances 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 8
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims 1
- 235000007164 Oryza sativa Nutrition 0.000 claims 1
- 238000000605 extraction Methods 0.000 claims 1
- 230000001869 rapid Effects 0.000 claims 1
- 235000009566 rice Nutrition 0.000 claims 1
- 238000005086 pumping Methods 0.000 abstract description 2
- 238000010186 staining Methods 0.000 abstract description 2
- DNNSSWSSYDEUBZ-OUBTZVSYSA-N krypton-85 Chemical compound [85Kr] DNNSSWSSYDEUBZ-OUBTZVSYSA-N 0.000 description 8
- 230000008859 change Effects 0.000 description 6
- DNNSSWSSYDEUBZ-OIOBTWANSA-N krypton (81mKr) gas Chemical compound [81Kr] DNNSSWSSYDEUBZ-OIOBTWANSA-N 0.000 description 5
- 229960001299 krypton (81mkr) gas Drugs 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000011545 laboratory measurement Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 210000003811 finger Anatomy 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
- G01N2001/1418—Depression, aspiration
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- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Hydrology & Water Resources (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The present invention relates to a kind of sample collecting apparatus and acquisition method using radioactive krypton isotope measurement seawater apparent age, one interface of threeway is connected by connecting line A with liquid gas storage tank, connecting line A is equipped with direct-reading barometer, other two interface of threeway passes through connecting line B respectively, connecting line C is connected with vacuum pump, nitrogen cylinder, threeway threshold switch is separately installed on three interfaces, vacuum pump vacuumizes the liquid gas cylinder before sampling, then by nitrogen cylinder to the liquid gas storage tank inflated with nitrogen before sampling；After liquid gas storage tank is vacuumized in sampling by vacuum pump, it is connected by connecting line D with myriametre thermohaline depth hydrophore, it will be in the Seawater inhalation liquid gas storage tank in sounding bottle on myriametre thermohaline depth hydrophore.The present invention reduces the remnants of air in systems to the greatest extent by the way of circulation pumping and inflation, provides good blank for closed acquisition seawater sample；It is sampled by the way of vacuum suck seawater sample, avoids atmospheric staining seawater sample.
Description
Technical field
The invention belongs to field of marine equipment, specifically a kind of to utilize radiokrypton (krypton -81 and krypton -85) isotope
Measure the sample collecting apparatus and acquisition method of seawater apparent age.
Background technique
Due to the special chemical stability of inert gas elements, there is radioactive inert element to be very suitable for carrying out accordingly
Tracer monitoring and dating, its advantage is that being mainly distributed in atmosphere other than being dissolved in ocean on a small quantity, and not
By the pollution of geological environment.It can be surveyed using krypton -81 (230,000 years half-life period), krypton -85 (10.76 half-life period) both nucleic
Determine the water sample age of different times.Currently, scientist successfully passes through immersible pump vacuum using krypton -81 and krypton -85 in the world
The mode of atomization successfully completely cuts off the age that air determines shallow layer surface water；For measuring the apparent year of deep layer ocean seawater
Age still lacks the method and apparatus that can effectively completely cut off air acquisition deep sea water sample.
Summary of the invention
The purpose of the present invention is to provide a kind of sample acquisitions using radioactive krypton isotope measurement seawater apparent age
Device and acquisition method.The present invention completely cuts off air acquisition deep sea water, solves in the acquisition of deep sea water sample and transfer process
The problem of staiing vulnerable to air, generates gas component during avoiding lab analysis deep sea water and concentration generates change
Change.The present invention is conducive to the krypton -81 and -85 concentration of krypton that scientific research personnel accurately analyzes deep sea water, to measure deep sea water table
The sight age lays the foundation.
The purpose of the present invention is achieved through the following technical solutions:
Sample collecting apparatus of the invention includes myriametre thermohaline depth hydrophore, liquid gas storage tank, vacuum pump, nitrogen cylinder, direct-reading
Barometer, threeway threshold switch and threeway, wherein threeway a interface is connected by connecting line A with the liquid gas storage tank, should
Connecting line A is equipped with the direct-reading barometer of gas pressure situation in detection liquid gas storage tank, and second interface of the threeway is logical
It crosses connecting line B to be connected with the vacuum pump, the third interface of threeway is connected by connecting line C with the nitrogen cylinder, should
It is separately installed with threeway threshold switch on three interfaces of threeway, the vacuum pump vacuumizes the liquid gas cylinder before sampling, then leads to
The nitrogen cylinder is crossed to the liquid gas storage tank inflated with nitrogen before sampling；After the liquid gas storage tank is vacuumized in sampling by vacuum pump,
It is connected by connecting line D with myriametre thermohaline depth hydrophore, by the Seawater inhalation in sounding bottle on the myriametre thermohaline depth hydrophore
In liquid gas storage tank；
Wherein: pressure reducing valve is equipped at the gas outlet of the nitrogen cylinder, which passes through connecting line C and the threeway
Third interface is connected；Or, the connecting line C is equipped with pressure reducing valve, which is located at three on threeway third interface
Between port valve switch and the gas outlet of nitrogen cylinder；
The connecting line A includes stainless steel tube and polyfluortetraethylene pipe interconnected, the direct-reading barometer setting
On the stainless steel tube；
The connecting line B, connecting line C and connecting line D are polyfluortetraethylene pipe；
The present invention measures the acquisition method of the sample collecting apparatus of seawater apparent age using radioactive krypton isotope are as follows:
Preparation before sampling: vacuumizing liquid gas storage tank using the vacuum pump, then utilizes the nitrogen cylinder to liquid
It is filled with nitrogen in LPG cylinder, makes to keep positive pressure in the liquid gas storage tank；
Spot sampling: the nitrogen of liquid gas storage tank is drawn to liquid gas storage tank using the vacuum pump and is evacuated, is passed through
The liquid gas storage tank being evacuated is connected by the connecting line D with the water outlet of myriametre thermohaline depth hydrophore, the myriametre thermohaline
Seawater in the sounding bottle of deep hydrophore is inhaled into liquid gas storage tank, realizes sampling；
Wherein: original state, the threeway threshold switch on three interfaces of the threeway are in closed state, when utilizing vacuum
When pump vacuumizes liquid gas storage tank, the triple valve opened on two interfaces connecting with the connecting line A and connecting line B is opened
It closes, opens the vacuum pump, extract the air in the liquid gas storage tank, until the direct-reading barometer registration is shown lower than 0
When setting value, the threeway threshold switch on second interface for connecting the connecting line B is closed；Then, pull up connecting line C with
One end of threeway connection, opens nitrogen cylinder, and the air-flow for generating at least one atmospheric pressure fills after connecting line C, then will connection
Pipeline C is connect with threeway, opens the threeway threshold switch on the third interface of threeway, makes to be filled with nitrogen in the liquid gas storage tank,
When the barometrical reading display of the direct-reading is greater than 0, the threeway threshold switch on the third interface of threeway is closed, completes one
The process of liquid gas storage tank vacuum nitrogen gas；
The process of the liquid gas storage tank vacuum nitrogen gas at least recycles twice；
When spot sampling, one end of the connecting line D is connected with myriametre thermohaline depth hydrophore, the other end with liquefied gas
Before tank connection, first the bubble of connecting line D tube wall adherency is discharged, is then connect again with the liquid gas storage tank；
The other end presses the bubble for adhering to the connecting line D tube wall by way of port generates turbulent flow finger
The other end of connecting line D, is then connected to the nut of the liquid gas storage tank water inlet by discharge by tube transitions in screw thread；
The liquid gas storage tank successively adopts water by the number of sounding bottle in myriametre thermohaline depth hydrophore, which is placed in electricity
On sub- scale, the volume of seawater in the liquid gas storage tank is measured by the reading of electronic scale, when the water residue 2 in a sounding bottle~
At 3 liter, liquid gas storage tank is closed, the water of adopting of this number sounding bottle is stopped, then carry out same water layer Next Serial Number sounding bottle adopt water,
Until completing adopting for the water layer seawater sample when volume of seawater accounts for liquefied gas tank body is accumulated score of three two in the liquid gas storage tank
Collection.
Advantages of the present invention and good effect are as follows:
1. sample collecting apparatus structure of the present invention is simple, to use environment not harsh requirement, it is suitble to aboard ship carry out
The collection in worksite of deep sea water sample.
2. sample collecting apparatus of the present invention by the way of circulation pumping and inflation, reduces the remnants of air in systems,
Good blank is provided for closed acquisition seawater sample.
3. sample collecting apparatus of the present invention is sampled by the way of vacuum suck seawater sample, atmospheric staining is avoided
Seawater sample.
4. efficiently solving deep sea water sample the present invention provides a kind of acquisition method of new measurement seawater apparent age
The problem of product stain during acquisition and transfer vulnerable to air, ensure that radiokrypton -85 in deep sea water sample and
- 81 concentration of krypton is consistent in laboratory analysis process with its concentration under deep sea in-situ state substantially, is utilized to realize
Krypton -81 in seawater measures seawater apparent age with krypton -85 and determines that the flow velocity of deep layer ocean current, flow direction have been provided and tried hard to keep
Barrier.
5. sounding bottle of the present invention samples, water in intermediate layer is only adopted, avoids upper water column and sky after sounding bottle air valve is opened
The contamination of sample is generated after gas exchange.
6. the present invention by way of constantly pressing connecting line port and generating turbulent flow, has been discharged on connecting line tube wall and has glued
Attached bubble.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of sample collecting apparatus sample jar pre-treatment of the present invention；
Fig. 2 is the structural schematic diagram of sample collecting apparatus collection in worksite seawater sample of the present invention；
Fig. 3 is the present invention measurement radioactive intensity per minute of krypton -85 with sea water advanced change curve；
Wherein: 1 is myriametre thermohaline depth hydrophore, and 2 be poly- first fluoride tubes, and 3 be liquid gas storage tank, and 4 be vacuum pump, and 5 be nitrogen
Gas cylinder, 6 be direct-reading barometer, and 7 be stainless steel tube, and 8 be threeway threshold switch, and 9 be threeway, and 10 be pressure reducing valve, and 11 be electronic scale.
Specific embodiment
The invention will be further described with reference to the accompanying drawing.
As shown in Figure 1 and Figure 2, sample collecting apparatus of the invention include myriametre thermohaline depth hydrophore 1, it is liquid gas storage tank 3, true
Sky pump 4, nitrogen cylinder 5, direct-reading barometer 6, threeway threshold switch 8 and threeway 9, wherein threeway 9 a interface passes through connecting line A
It is connected with liquid gas storage tank 3, connecting line A is equipped with the direct-reading barometer 6 of gas pressure situation in detection liquid gas storage tank 3；Three
Logical 9 second interface is connected by connecting line B with vacuum pump 4, and vacuum pump 4 can extract the gas in liquid gas storage tank 3 out；
The third interface of threeway 9 is connected by connecting line C with nitrogen cylinder 5, and nitrogen cylinder 5 is that liquid gas storage tank 3 provides nitrogen.Threeway 9
Three interfaces on be separately installed with threeway threshold switch 8, pass through change three threeway threshold switch 8 closing, guarantee liquid gas storage tank 3
It is pumped into absolute vacuum, closed water of adopting is carried out for connection myriametre thermohaline depth hydrophore 1 in next step and is ready.
Pressure reducing valve 10 is equipped at the gas outlet of nitrogen cylinder 5, which passes through connecting line C and the third of threeway 9
Interface is connected；Or, connecting line C is equipped with pressure reducing valve 10, the triple valve which is located on 9 third interface of threeway is opened
It closes between 8 and the gas outlet of nitrogen cylinder 5.The present embodiment is that pressure reducing valve 10 is provided at the gas outlet of nitrogen cylinder 5.
The connecting line A of the present embodiment includes stainless steel tube 7 and polyfluortetraethylene pipe 2 interconnected, direct-reading barometer 6
It is arranged on the stainless steel tube 7.The connecting line B, connecting line C and connecting line D of the present embodiment are polyfluortetraethylene pipe
2。
Myriametre thermohaline depth hydrophore 1 in sample collecting apparatus of the present invention is commercial products, is purchased in U.S. SBEBIRD
GONGSI company, model SBE911.Myriametre thermohaline depth hydrophore 1 has the sounding bottle of 24 bottles of 10L, distinguishes 1~No. 24 by number
It is looped around the periphery of the thermohaline depth sensor of myriametre thermohaline depth hydrophore 1, is adopted in such a way that electromagnetic principle deep sea in-situ closes bottle
Collect the seawater sample of different depth water layer.24 bottles of 10L sounding bottles of myriametre thermohaline depth hydrophore 1 adopt water and only adopt water in intermediate layer, keep away
Exempt from upper water column and air exchange after sounding bottle air valve is opened and generates sample contamination.Direct-reading in sample collecting apparatus of the present invention
Barometer 6 is the prior art, and the direct-reading barometer 6 being arranged on stainless steel tube 7 is depressed, direct-reading air pressure in a normal atmosphere
The reading of meter 6 is zero, can be with real-time detection to the gas pressure change of liquid gas storage tank 3 by the reading of direct-reading barometer 6.Myriametre
The water outlet of thermohaline depth hydrophore 1 is connect by polyfluortetraethylene pipe 2 with the water inlet of liquid gas storage tank 3, deep for closed acquisition
Layer seawater.Liquid gas storage tank 3 is placed on electronic scale 11, the weight for real-time monitoring acquisition water sample.All junctions are all made of
Sealing ring and buckle are fixed locked, guarantee the air-tightness of pipeline.
Acquisition method of the invention are as follows:
Preparation before sampling: vacuumizing liquid gas storage tank 3 using the vacuum pump 4, then utilizes nitrogen cylinder 5 to liquefaction
It is filled with nitrogen in gas tank 3, makes to keep positive pressure in the liquid gas storage tank 3；
Spot sampling: the nitrogen of liquid gas storage tank 3 is drawn to liquid gas storage tank 3 using vacuum pump 4 and is evacuated, company is passed through
The liquid gas storage tank 3 being evacuated is connected by adapter tube road D with the water outlet of myriametre thermohaline depth hydrophore 1, which adopts deeply
Seawater in the sounding bottle of hydrophone 1 is inhaled into liquid gas storage tank 3, realizes sampling.Specifically:
Preparation before sampling:
Liquid gas storage tank 3 (sample jar) is connected to first interface of threeway 9 by stainless steel tube 7 and polyfluortetraethylene pipe 2
On, stainless steel tube 7 has direct-reading barometer 6 above, for detecting gas pressure situation in liquid gas storage tank 3；Vacuum pump 4 and nitrogen
Bottle 5 is connect by polyfluortetraethylene pipe 2 with second interface, the third interface of threeway 9 respectively, on three interfaces of threeway 9
Have threeway threshold switch 8.Original state, the threeway threshold switch 8 on 9 three interfaces of threeway are in closed state.
When being vacuumized using vacuum pump 4 to liquid gas storage tank 3, open on first interface being connect with liquid gas storage tank 3
Threeway threshold switch 8 on threeway threshold switch 8 and second interface connecting with vacuum pump 4, direct-reading barometer 6 is plugged in,
The each junction of pipeline is tightened, vacuum pump 4 is opened, the air in liquid gas storage tank 3 is extracted, until 6 registration of direct-reading barometer is shown
When setting value (the present embodiment be -98kpa) lower than 0, the threeway threshold switch on second interface connecting with vacuum pump 4 is closed
8；Then, one end that connecting line C is connect with threeway 9 is pulled up, the pressure reducing valve 10 at 5 gas outlet of nitrogen cylinder is opened, is generated at least
The air-flow of one atmospheric pressure (the present embodiment is 1~2 atmospheric pressure) fills after connecting line C, then by connecting line C and threeway
9 connections, open the threeway threshold switch 8 on the third interface of threeway 9, make full of nitrogen in liquid gas storage tank 3, when direct-reading barometer
When 6 reading is shown greater than 0, the threeway threshold switch 8 on the third interface of threeway 9 is closed, a liquid gas storage tank 3 is completed and takes out very
The process of empty inflated with nitrogen.Then the process of above-mentioned vacuum nitrogen gas is repeated, second interface connecting with vacuum pump 4 is opened
On threeway threshold switch 8, open vacuum pump 4 continue to vacuumize liquid gas storage tank 3, until direct-reading barometer 6 reading display-
When 98kpa, the threeway threshold switch 8 on second interface is closed, opens the triple valve on the third interface connecting with nitrogen cylinder 5
Switch 8 opens pressure reducing valve 10, generates 1~2 atmosphere pressure gas stream and gives liquid gas storage tank 3 inflated with nitrogen, until direct-reading barometer 6 is read
When greater than 0, stop inflated with nitrogen.The process of 3 vacuum nitrogen gas of liquid gas storage tank at least recycles twice, closes liquid by tightening knob
Gas outlet on LPG cylinder 3 guarantees the holding positive pressure of 3 liquid gas storage tanks.
Sample phase at the scene:
The nitrogen of 3 the inside of liquid gas storage tank is evacuated by vacuum pump 4, switch is then tightened, it is close to prepare deck scene
Close Cai Shui.The air valve of 1 upper end of myriametre thermohaline depth hydrophore is opened, in one end of connecting line D and myriametre thermohaline depth hydrophore 1
The sounding bottle water outlet connection of one number, the other end generate the side of turbulent flow by the port of the continuous pressing other end of thumb
The bubble that formula adheres to connecting line D tube wall is discharged, and then again connects the other end of connecting line D by tube transitions in screw thread
To the nut of 3 water inlet of liquid gas storage tank, the knob of liquid gas storage tank 3 is opened, the seawater of sounding bottle is inhaled into liquid gas storage tank 3；It is logical
The reading for crossing electronic scale 11 measures the volume of seawater in liquid gas storage tank 3, when 2~3 liters of water residue in the number sounding bottle,
The knob of liquid gas storage tank 3 is closed, stop this number sounding bottle adopts water, and same method is taken to carry out the same next volume of water layer
Number sounding bottle adopts water, when the volume of seawater in liquid gas storage tank 3 accounts for 3 volume 2/3rds of liquid gas storage tank, completes this water
The acquisition of layer seawater sample.
Verifying of the present invention in laboratory measurements:
In order to verify feasibility of the invention, acquisition of the applicant with section's student number integrated survey ship at the scene through the invention
The seawater sample laboratory measurements of method acquisition, sampling time are 21 points~23 points of November 21 in 2016, erect-position position
It is 139 ° for longitude, latitude is 11.35 °, and sampling level is respectively 100m, 200m, 300m, 400m, 500m, 1000m, each layer
It samples 18L (sample tank volume 24L)；Fig. 3 is the radioactive intensity per minute of krypton -85 with sea water advanced change curve, horizontal seat
It is designated as the radioactive intensity per minute of krypton -85, ordinate is sea water advanced；It can be seen that the nuclear number that Kr-85 decays per minute
As the trend successively decreased is presented in the increase of depth, right side dotted line is the nuclear number that modern times atmosphere Kr-85 decays per minute, sampling
Standard deviation measured by six water layers controls within 10%.As shown in figure 3, Kr-85 is per minute under 1000m depth
The nuclear number of decay is close to zero, it was demonstrated that in this depth seawater not by modern atmospheric effect, can be divided by Kr-85 half-life period
Different depth is precipitated to plunge into the commercial sea water apparent age.
Claims (10)
1. a kind of sample collecting apparatus using radioactive krypton isotope measurement seawater apparent age, it is characterised in that: including ten thousand
Rice thermohaline depth hydrophore (1), liquid gas storage tank (3), vacuum pump (4), nitrogen cylinder (5), direct-reading barometer (6), threeway threshold switch (8)
And threeway (9), wherein an interface of threeway (9) is connected by connecting line A with the liquid gas storage tank (3), connecting line A
It is equipped with the direct-reading barometer (6) of gas pressure situation in detection liquid gas storage tank (3), second interface of the threeway (9) is logical
It crosses connecting line B to be connected with the vacuum pump (4), the third interface of threeway (9) passes through connecting line C and the nitrogen cylinder
(5) it is connected, is separately installed with threeway threshold switch (8) on three interfaces of the threeway (9), before the vacuum pump (4) is to sampling
Liquid gas cylinder (3) vacuumizes, then by the nitrogen cylinder (5) to liquid gas storage tank (3) inflated with nitrogen before sampling；The liquid gas storage tank
(3) after being vacuumized in sampling by vacuum pump (4), it is connected by connecting line D with myriametre thermohaline depth hydrophore (1), by this
In Seawater inhalation liquid gas storage tank (3) on myriametre thermohaline depth hydrophore (1) in sounding bottle.
2. special according to claim 1 using the sample collecting apparatus of radioactive krypton isotope measurement seawater apparent age
Sign is: at the gas outlet of the nitrogen cylinder (5) be equipped with pressure reducing valve (10), the pressure reducing valve (10) by connecting line C with it is described
The third interface of threeway (9) is connected；Or, the connecting line C is equipped with pressure reducing valve (10), which is located at threeway
(9) between the threeway threshold switch (8) on third interface and the gas outlet of nitrogen cylinder (5).
3. special according to claim 1 using the sample collecting apparatus of radioactive krypton isotope measurement seawater apparent age
Sign is: the connecting line A includes stainless steel tube interconnected (7) and polyfluortetraethylene pipe (2), the direct-reading barometer
(6) it is arranged on the stainless steel tube (7).
4. special according to claim 1 using the sample collecting apparatus of radioactive krypton isotope measurement seawater apparent age
Sign is: the connecting line B, connecting line C and connecting line D are polyfluortetraethylene pipe (2).
5. utilizing the sample of radioactive krypton isotope measurement seawater apparent age described in a kind of Claims 1-4 any claim
The acquisition method of product acquisition device, it is characterised in that:
Preparation before sampling: vacuumizing liquid gas storage tank (3) using the vacuum pump (4), then utilizes the nitrogen cylinder (5)
It is filled with nitrogen into liquid gas storage tank (3), makes to keep positive pressure in the liquid gas storage tank (3)；
Spot sampling: being drawn to liquid gas storage tank (3) for the nitrogen of liquid gas storage tank (3) using the vacuum pump (4) and be evacuated,
The liquid gas storage tank being evacuated (3) is connected with the water outlet of myriametre thermohaline depth hydrophore (1) by the connecting line D,
Seawater in the sounding bottle of the myriametre thermohaline depth hydrophore (1) is inhaled into liquid gas storage tank (3), realizes sampling.
6. acquisition method according to claim 5, it is characterised in that: original state, on (9) three interfaces of the threeway
Threeway threshold switch (8) is in closed state, when being vacuumized using vacuum pump (4) to liquid gas storage tank (3), opens and the company
The threeway threshold switch (8) on road A and two interfaces of connecting line B connection is taken over, is opened the vacuum pump (4), described in extraction
Air in liquid gas storage tank (3) is closed described in connection when direct-reading barometer (6) registration shows the setting value lower than 0
Threeway threshold switch (8) on second interface of connecting line B；Then, one end that connecting line C is connect with threeway (9) is pulled up,
It opens nitrogen cylinder (5), the air-flow for generating at least one atmospheric pressure fills after connecting line C, then by connecting line C and threeway
(9) it connects, opens the threeway threshold switch (8) on the third interface of threeway (9), make to be filled with nitrogen in the liquid gas storage tank (3),
When the reading of the direct-reading barometer (6), which is shown, is greater than 0, the threeway threshold switch on the third interface of threeway (9) is closed
(8), the process of liquid gas storage tank (3) vacuum nitrogen gas is completed.
7. acquisition method according to claim 6, it is characterised in that: the mistake of liquid gas storage tank (3) vacuum nitrogen gas
Journey at least recycles twice.
8. acquisition method according to claim 5, it is characterised in that: when spot sampling, one end of the connecting line D with
Myriametre thermohaline depth hydrophore (1) is connected, and the other end with liquid gas storage tank (3) before connecting, first to the gas of connecting line D tube wall adherency
Bubble is discharged, and is then connect again with the liquid gas storage tank (3).
9. acquisition method according to claim 8, it is characterised in that: the other end presses port by finger and generates rapids
The bubble that the mode of stream adheres to the connecting line D tube wall is discharged, and the other end of connecting line D is then passed through screw thread inner tube
Transition is connected to the nut of the liquid gas storage tank (3) water inlet.
10. acquisition method according to claim 5, it is characterised in that: the liquid gas storage tank (3) adopts water by myriametre thermohaline deeply
The number of sounding bottle successively adopts water in device (1), which is placed on electronic scale (11), passes through the reading of electronic scale (11)
Number measures the volumes of seawater in the liquid gas storage tank (3), when 2~3 liters of water residue in a sounding bottle, closes liquid gas storage tank
(3), stop the water of adopting of this number sounding bottle, then carry out same water layer Next Serial Number sounding bottle adopt water, until the liquefied gas
When the volume of seawater accounts for liquid gas storage tank (3) volume 2/3rds in tank (3), the acquisition of the water layer seawater sample is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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