CN104597182A - Method for detecting benzene series in air - Google Patents
Method for detecting benzene series in air Download PDFInfo
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- CN104597182A CN104597182A CN201310534176.0A CN201310534176A CN104597182A CN 104597182 A CN104597182 A CN 104597182A CN 201310534176 A CN201310534176 A CN 201310534176A CN 104597182 A CN104597182 A CN 104597182A
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- benzene
- air
- benzene series
- sampling pipe
- detecting
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- Investigating Or Analysing Biological Materials (AREA)
Abstract
The invention relates to a method for detecting benzene series in air, and belongs to the field of analysis chemistry. The method comprises the following steps: 1, adsorbing a sample into a sampling tube; and 2, desorbing the sampling tube obtained in step 1, and detecting a gas obtained after the desorption through gas chromatography. The method makes the separation degree of the benzene series large.
Description
Technical field
The present invention relates to the detection method of a kind of benzene in air system thing, belong to analytical chemistry field.
Background technology
Benzene and benzene homologues are colourless light yellow clear oily liquids, have the gas of strong aroma, and volatile is steam, inflammable poisonous.Toluene, dimethylbenzene belong to and substituted benzene, are all the pyrolysis products of coal tar fractional distillation or oil.In current interior decoration, multiplex toluene, dimethylbenzene replace purified petroleum benzin to make solvent or the thinning agent of various glue paint and waterproof material.At present, benzene compounds is defined as strong carcinogen by the World Health Organization (WHO).
The source of benzene and benzene homologues: 1, the organic solvent of building materials, as adjuvant and thinning agent, the waterproof material additive of paint; 2, the solution of ornament materials, Wood-based Panel Furniture, bonding agent.
The harm of benzene and benzene homologues: 1, benzene Chronic Benzene Poisoning mainly benzene have spread effect to skin, eyes and the upper respiratory tract.Frequent Contact benzene, skin can because of degreasing desiccation, furfur, some appearance allergic eczemas.Long-term suction benzene can cause alpastic anemia.During the initial stage, there is similar scorbutic haemorrhage at gums and schneiderian membrance place, and occur neurasthenia symptom, show as giddy, insomnia, weak, failure of memory, the symptom such as thinking and judgment reduction.There is Neuroleptic Leukocytopenia and decrease of platelet later, seriously can make marrow hemopoiesis technical ability generation obstacle, cause alpastic anemia.If hematopoiesis function destroys completely, fatal graininess leucocyte disappearance disease can be there is, and can leukemogenesis.A lot of labor hygiene data showed in the last few years: in the workman of Long Term Contact Mixture of Benzene, toluene And Xylene, alpastic anemia attack rate is higher.Benzene can cause the birth defects of fetus.2, toluene and dimethylbenzene Main Function are to the damage of central nervous system and cause MMi.Toluene under exposure repeatedly as entered to make brain and kidney to be subject to permanent damage with snuffing.As mother is subject to serious exposure at period of gestation, toxicity may affect baby and produce defect.Dimethylbenzene can cause dry skin, chap and redness, and nervous system is impaired, also can cause kidney and the temporary damage of liver.Research shows, it is responsive that women endangers the comparatively male sex to Benzene and Homologues, toluene, dimethylbenzene also have certain influence to reproductive function, the women of child-bearing age suck benzene for a long time also can cause menoxenia, main manifestations is menorrhalgia or disorder, often seek medical advice because of menorrhagia or intermenstrual flow at the beginning, be often misdiagnosed as uterine hemorrhage in function custom and affect treatment adversely.When pregnancy period contact toluene, dimethylbenzene and Mixture of Benzene, toluene And Xylene, the incidence of disease of the complications of pregnancy such as pregnancy-hypertension syndrome, the vomiting of pregnancy and anemia during pregnancy significantly increases, and expert statistics finds that the contact laboratory worker of toluene and the rate of spontaneous abortion of workman obviously increase.
Summary of the invention
The present invention, by sampling pipe absorbed air sample, improves the minimum detectability of benzene homologues.
The invention provides the detection method of a kind of benzene in air system thing, described method comprises the steps:
1. by sample adsorption in sampling pipe;
2. desorption procedure 1. sampling pipe, desorb gained gas passes through gas chromatographic detection.
The present invention, by adsorbent air sample, improves the minimum detectability of benzene homologues.
Step of the present invention 1. sampling pipe filler is preferably molecular sieve, and its granularity is 100 ~ 200 orders.
Step of the present invention 2. desorption temperature is preferably 300 ~ 350 DEG C, and heating rate is 40 ~ 60 DEG C/s.
Step of the present invention 2. chromatograph packing material is preferably dimethyl siloxane.
Beneficial effect of the present invention is:
1. benzene homologues degree of separation is large;
2. benzene homologues detection limit is low.
Embodiment
Following non-limiting example can make the present invention of those of ordinary skill in the art's comprehend, but does not limit the present invention in any way.
Embodiment 1
A detection method for benzene in air system thing, described method comprises the steps:
1. be adsorbed onto on molecular sieve by air sample by pump, Size of Zeolite is 100 ~ 200 orders;
2. molecular sieve after the absorption 1. of 300 DEG C of desorption procedure, heating rate is 50 DEG C/s, and desorption gas is by gas chromatographic detection, and chromatographic condition is: the dimethyl siloxane post of chromatographic column 0.25mm × 0.25um × 60m.
Claims (4)
1. a detection method for benzene in air system thing, described method comprises the steps:
1. by sample adsorption in sampling pipe;
2. desorption procedure 1. sampling pipe, desorb gained gas passes through gas chromatographic detection.
2. method according to claim 1, is characterized in that: described step 1. sampling pipe filler is molecular sieve, and its granularity is 100 ~ 200 orders.
3. method according to claim 1, is characterized in that: described step 2. desorption temperature is 300 ~ 350 DEG C.
4. method according to claim 1, is characterized in that: described step 2. chromatograph packing material is dimethyl siloxane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310534176.0A CN104597182A (en) | 2013-10-31 | 2013-10-31 | Method for detecting benzene series in air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310534176.0A CN104597182A (en) | 2013-10-31 | 2013-10-31 | Method for detecting benzene series in air |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104597182A true CN104597182A (en) | 2015-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310534176.0A Pending CN104597182A (en) | 2013-10-31 | 2013-10-31 | Method for detecting benzene series in air |
Country Status (1)
| Country | Link |
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| CN (1) | CN104597182A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044242A (en) * | 2015-08-28 | 2015-11-11 | 保护伞环保科技成都有限公司 | Method for determining styrene content of indoor air after decoration |
| CN109668972A (en) * | 2017-10-17 | 2019-04-23 | 中国石油化工股份有限公司 | The detection method of volatile organic matter in Petrochemical Enterprises air and waste gas |
-
2013
- 2013-10-31 CN CN201310534176.0A patent/CN104597182A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044242A (en) * | 2015-08-28 | 2015-11-11 | 保护伞环保科技成都有限公司 | Method for determining styrene content of indoor air after decoration |
| CN109668972A (en) * | 2017-10-17 | 2019-04-23 | 中国石油化工股份有限公司 | The detection method of volatile organic matter in Petrochemical Enterprises air and waste gas |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150506 |