CN101256149A - Instant color-changing indication methylene oxide detecting instrument as well as method and application - Google Patents
Instant color-changing indication methylene oxide detecting instrument as well as method and application Download PDFInfo
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- CN101256149A CN101256149A CNA2007100377188A CN200710037718A CN101256149A CN 101256149 A CN101256149 A CN 101256149A CN A2007100377188 A CNA2007100377188 A CN A2007100377188A CN 200710037718 A CN200710037718 A CN 200710037718A CN 101256149 A CN101256149 A CN 101256149A
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- methylene oxide
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Abstract
The invention relates to the field of the air testing and purifying apparatus, specifically relates to a instant discolored indicating formaldehyde detector as well as the method and application, the top part of the machine box is equipped with a liquid storage container, the bottom part of the liquid storage container is equipped with a liquid outlet, the liquid outlet is connected with a liquid drainage tube, the liquid drainage tube clings to the top of the filter screen, the filter screen is fixed on the machine box vertically, a blower is fixed on the side of the filter screen, a water outlet is equipped on the head face of the machine box which is under the filter screen, a water storage cup is equipped below the water outlet; the invention has the following advantages that: the entire detector is easy to make, the fabrication cost is low, the detector can be used repeatedly, the reagent price for test is cheap, the dosage is few, every test only cost some cents, the test method is simple and easy to learn, which can be mastered by everybody, and is convenient for spread to household.
Description
[technical field]
The present invention relates to air detection, purifying apparatus technical field, specifically a kind of instant color-changing indication methylene oxide detecting instrument and methods and applications.
[background technology]
Will count the harm maximum of formaldehyde in the indoor air pollutants, sucking formaldehyde for a long time can be carcinogenic, brings out leukaemia.Formaldehyde is again a kind of colourless gas, and is almost tasteless when concentration is low, makes us being difficult to watch out for.So, the department that people please have qualification detects the air quality of own living environment to the doorstep, does not thing just all solve? really not so in fact, formaldehyde is present in the decoration and furniture material of numerous species, in use formaldehyde can come out from these materials at leisure, and this process is the longest to reach 15 years.Can't guarantee long-term safety so depend merely on one-time detection, comprise and taked various means to carry out after air administers, how also need in time to understand the result that administers, in this long-term process, people should be as the physical condition of often making regular check on oneself, often the air quality of the own living environment of test is is in time gone and found out what's going on the harm that could effectively prevent harmful gas to bring.
Mainly contain following several detection method at present: (1), department's detection to the doorstep that please have qualification, adopt the detection method of national regulation to test, a whole set of accurate detecting instrument of whole process need and the accurate reagent of preparation, operate by technician and to finish through professional training, it is higher to charge, and ordinary consumer is difficult to bear and can't oneself operates.(2), select for use the exact instrument of import to carry out the scene to detect, can measure data then and there, degree of accuracy is also wanted more than 10,000 yuan also than higher but the price of every instrument is minimum, is up to 50,000 yuan, is not suitable for average family and uses.(3), select common disposable simple detection instrument for use, 40 to 50 yuan every, can room of disposable detection, easy to use, its measuring accuracy is but very low, because all be " the gradual change colourimetry " that adopts, the consumer is under the situation of chromatic discrimination power and light difference, and identification error can be bigger.The many homemade detectors of price about thousand yuan are arranged (4), in addition, but also be " the gradual change colourimetry " that adopts, also can't spread to family and use.
[summary of the invention]
The present invention is in order to overcome above-mentioned deficiency, a kind of Determination of formaldehyde content instrument and detection method in the air that can be used for measuring is provided, use this method, can provide identification means clear, that understand for the user, compare with prior art " gradual change colourimetry ", identification is more convenient, and degree of accuracy is higher.
For achieving the above object, design a kind of methylene oxide detecting instrument, comprise liquid storage container, screen pack, blower fan, water storage cup, cabinet, it is characterized in that cabinet 9 tops are equipped with liquid storage container 1, the liquid storage container bottom has liquid outlet, liquid outlet is connected with catheter 6, catheter is close to the upper end of screen pack 2, and on the screen pack vertical fixing cabinet, a side of screen pack is equipped with blower fan 3, the cabinet end face of screen pack below is provided with a water delivering orifice 4, and the water delivering orifice below is provided with water storage cup 5.
On the described catheter 6 valve pull bar 8 is housed.
Described cabinet 9 lower portion are provided with time display 10, supply hub 11, time control knob 12 and fan switch 13.
Described detection method step is as follows:
(1), adopt pure water or distilled water and sodium sulfite aqueous solution to be made into the detection base fluid.
(2), get the detection by quantitative base fluid, in detecting base fluid, splash into iodine solution then, the detection base fluid in measuring cup become faint yellow till, the quantity of the good iodine solution that spends of record.
(3), again get a detection by quantitative base fluid, be poured in the liquid storage container at methylene oxide detecting instrument top.
(4), open methylene oxide detecting instrument and configuring the unused time.
(5), from the water storage cup of methylene oxide detecting instrument, extract gauge water solution, in this aqueous solution, splash into iodine solution again, till aqueous solution becomes faint yellow and is the same with the aqueous solution color of step (2), the quantity of the good iodine solution that spends of record.
(6), the data that record in step (2) and (5) are converted just can detect the content that draws formaldehyde in the air.
Principle of the present invention is: suck quantitative tested air with a typhoon machine by screen pack in the time of setting, simultaneously, the sodium sulfite solution that quantitatively prepares is placed the liquid storage container at instrument top, during start, allow solution gutter down naturally along screen pack, form water curtain on the screen pack surface, will generate NaOH fast with the sodium sulphite in the aqueous solution as containing formaldehyde in the inhaled air, after the shutdown, with quantitative reacted aqueous solution, splash into the iodine solution indicator, reacting phenomenon shows as: the color that has just begun iodine solution can disappear fast, because iodine solution is a kind of oxygenant, and sodium sulphite and NaOH all can be by the iodine solution oxidations, so the color of iodine solution can disappear fast in this process, if iodine solution is constantly splashed into, last, sodium sulphite in the aqueous solution and NaOH all oxidized intact after, when splashing into iodine solution again, aqueous solution will show faint yellow immediately.Oxidable thing in the aqueous solution is by after whole oxidations, from the colourless iodine solution that need splash into the 0.02-0.03 milliliter to this change procedure that begins to develop the color approximately again.By converting, just known the content of formaldehyde in the detected air to splashing into what data of iodine solution quantity.
The present invention has following several advantage:
(1), whole detector makes simply, low cost can be used repeatedly.
(2), the reagent of test usefulness is cheap, consumption is few, every detection only needs once that cost is several shares money.
(3), method of testing is easy to learn, everybody can grasp, and is convenient to penetration and promotion to family and uses.
(4), have than higher accuracy of detection, can satisfy the demand of ordinary consumer.
[description of drawings]
Fig. 1 is a structural representation of the present invention.
Referring to Fig. 1,1 is liquid storage container, and 2 is screen pack, and 3 is blower fan, and 4 is water delivering orifice, and 5 is the water storage cup, and 6 is catheter, and 7 is fluid hole, and 8 is the valve pull bar, and 9 is cabinet, and 10 is time display, and 11 is supply hub, 12 time control knobs, and 13 is fan switch.
[embodiment]
Referring to Fig. 1, liquid storage container 1 is equipped with at cabinet 9 tops, the liquid storage container bottom has liquid outlet, liquid outlet is connected with catheter 6, valve pull bar 8 is housed on the catheter 6, catheter is close to the upper end of screen pack 2 and is fixed on the cabinet, on the screen pack vertical fixing cabinet, one side of screen pack is equipped with blower fan 3, blower fan is installed on the cabinet, the cabinet end face of screen pack below is provided with a water delivering orifice 4, and the water delivering orifice below is provided with water storage cup 5, and cabinet 9 lower portion are provided with time display 10, supply hub 11, time control knob 12 and fan switch 13.
The program that detects is: (1), to be made into the aqueous solution of 10% content with the anhydrous sodium sulfite of SILVER REAGENT standby.(2), it is standby to be made into the ethanolic solution of 1% content with the iodine of SILVER REAGENT.(3), add 1 milliliter of sodium sulfite aqueous solution for preparing with 100 gram pure water or distilled water and be made into the detection base fluid.(4), extract 20 milliliters with syringe and detect base fluid injection measuring cup, extracting iodine solution with 1 milliliter syringe again splashes in the measuring cup, detection base fluid in measuring cup become faint yellow till, its shade can compare with the color comparison tube that is provided with, and splashing into of iodine solution continued to employ after quantity performs record.(5), the detection base fluid of remainder is poured into the liquid storage container at detector top, energized, press the time control knob of detector, configuring the on time is 1 minute, press fan switch and make the blower fan running, pull out the valve pull bar simultaneously, the aqueous solution in the liquid storage container can be flowed out along fluid hole, drop down along screen pack, flow in the water storage cup.(6), by 1 minute, blower fan is subjected to programmed control meeting auto stop, this moment to wait for that also the aqueous solution in the liquid storage container has all flowed, and pushes back the valve pull bar.(7), from the water storage cup, extract 20 ml water solution and inject measuring cup, extract iodine solution with 1 milliliter syringe again and splash in the measuring cup, the aqueous solution in measuring cup become faint yellow and the same with color in the color comparison tube till, record is the quantity of the iodine solution that spends well.(8), with the data that record for the first time, after deducting the numerical value of sodium sulphite oxidation loss in air when filtering, resulting data compare with the data that detect for the second time, if data basically identical, then illustrating does not have formaldehyde in the air, if detect the data height that draws for the second time, then illustrate and contain formaldehyde in the air, data exceed many more, and then the content of formaldehyde is just high more.
Claims (4)
1. methylene oxide detecting instrument, comprise liquid storage container, screen pack, blower fan, water storage cup, cabinet, it is characterized in that cabinet (9) top is equipped with liquid storage container (1), the liquid storage container bottom has liquid outlet, and liquid outlet is connected with catheter (6), and catheter is close to the upper end of screen pack (2), on the screen pack vertical fixing cabinet, one side of screen pack is equipped with blower fan (3), and the cabinet end face of screen pack below is provided with a water delivering orifice (4), and the water delivering orifice below is provided with water storage cup (5).
2. a kind of methylene oxide detecting instrument according to claim 1 is characterized in that being equipped with on the described catheter (6) valve pull bar (8).
3. a kind of methylene oxide detecting instrument according to claim 1 and 2 is characterized in that described cabinet (9) lower portion is provided with time display (10), supply hub (11), time control knob (12) and fan switch (13).
4. formaldehyde detection method, it is characterized in that: its method step is as follows:
(1), adopt pure water or distilled water and sodium sulfite aqueous solution to be made into the detection base fluid.
(2), get the detection by quantitative base fluid, in detecting base fluid, splash into iodine solution then, the detection base fluid in measuring cup become faint yellow till, the quantity of the good iodine solution that spends of record.
(3), again get a detection by quantitative base fluid, be poured in the liquid storage container at methylene oxide detecting instrument top.
(4), open methylene oxide detecting instrument and configuring the unused time.
(5), from the water storage cup of methylene oxide detecting instrument, extract gauge water solution, in this aqueous solution, splash into iodine solution again, till aqueous solution becomes faint yellow and is the same with the aqueous solution color of step (2), the quantity of the good iodine solution that spends of record.
(6), the data that record in step (2) and (5) are converted just can detect the content that draws formaldehyde in the air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100377188A CN101256149A (en) | 2007-02-28 | 2007-02-28 | Instant color-changing indication methylene oxide detecting instrument as well as method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100377188A CN101256149A (en) | 2007-02-28 | 2007-02-28 | Instant color-changing indication methylene oxide detecting instrument as well as method and application |
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| Publication Number | Publication Date |
|---|---|
| CN101256149A true CN101256149A (en) | 2008-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100377188A Pending CN101256149A (en) | 2007-02-28 | 2007-02-28 | Instant color-changing indication methylene oxide detecting instrument as well as method and application |
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| CN (1) | CN101256149A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103495272A (en) * | 2013-10-23 | 2014-01-08 | 西安科技大学 | Formaldehyde absorbing material |
| US11079401B2 (en) | 2016-03-09 | 2021-08-03 | 9106634 Canada Ltd. | Apparatus and method for indicating at least one property related to an object |
-
2007
- 2007-02-28 CN CNA2007100377188A patent/CN101256149A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103495272A (en) * | 2013-10-23 | 2014-01-08 | 西安科技大学 | Formaldehyde absorbing material |
| CN103495272B (en) * | 2013-10-23 | 2016-03-30 | 西安科技大学 | A kind of formaldehyde absorption material |
| US11079401B2 (en) | 2016-03-09 | 2021-08-03 | 9106634 Canada Ltd. | Apparatus and method for indicating at least one property related to an object |
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Open date: 20080903 |