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Infrared light detection method for rapidly detecting industrially discharged toluene

A detection method, infrared light technology, applied in measuring devices, material analysis through optical means, instruments, etc., can solve problems such as easy to cause danger, and achieve good results and good reproducibility

Pending Publication Date: 2022-01-28
YANGTZE DELTA REGION INST OF UNIV OF ELECTRONICS SCI & TECH OF CHINE HUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When industrial waste gas or waste water is discharged, toluene is generally discharged together. If the toluene cannot be accurately and quickly measured during discharge, it is very easy to cause danger. Therefore, an infrared light detection method for quickly detecting industrial toluene is needed to improve the current situation. lack of technology

Method used

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  • Infrared light detection method for rapidly detecting industrially discharged toluene
  • Infrared light detection method for rapidly detecting industrially discharged toluene
  • Infrared light detection method for rapidly detecting industrially discharged toluene

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1 A kind of infrared light detection method of rapid detection industrial discharge toluene, comprises:

[0022] 1. Accurately extract toluene gas with a micro syringe, inject it into a 100ml syringe, and prepare a standard sample with a concentration of 320ug / ml;

[0023] 2. At the industrial waste gas place, use a 100ml syringe to wash with on-site air three times at the sampling site, extract the on-site air through the syringe, then put on a plastic cap to seal it, and mark it as an exhaust gas sample; then use the syringe to collect clean air and seal it with a plastic cap , marked as a comparison sample, the air in the syringe of the comparison sample is introduced into a clean container for storage;

[0024] 3. Place the toluene sample and the comparison sample vertically, and record the temperature and pressure of the laboratory;

[0025] 4. Dilute the standard sample with clean air to form a series of 80ug / ml standard samples, take 1ml for injection...

Embodiment 2

[0028] Embodiment 2 A kind of infrared light detection method of rapid detection industrial emission toluene, comprising:

[0029] 1. Accurately extract toluene gas with a micro syringe, inject it into a 100ml syringe, and prepare a standard sample with a concentration of 320ug / ml;

[0030] 2. At the industrial waste gas place, use a 100ml syringe to wash with on-site air three times at the sampling site, extract the on-site air through the syringe, then put on a plastic cap to seal it, and mark it as an exhaust gas sample; then use the syringe to collect clean air and seal it with a plastic cap , marked as a comparison sample, the air in the syringe of the comparison sample is introduced into a clean container for storage;

[0031] 3. Place the toluene sample and the comparison sample vertically, and record the temperature and pressure of the laboratory;

[0032] 4. Dilute the standard sample with clean air to form a 160ug / ml standard sample series, take 1ml for injection, m...

Embodiment 3

[0035] Embodiment 3 A kind of infrared light detection method of rapid detection industrial emission toluene, comprises:

[0036] 1. Accurately extract toluene gas with a micro syringe, inject it into a 100ml syringe, and prepare a standard sample with a concentration of 320ug / ml;

[0037] 2. At the industrial waste gas place, use a 100ml syringe to wash with on-site air three times at the sampling site, extract the on-site air through the syringe, then put on a plastic cap to seal it, and mark it as an exhaust gas sample; then use the syringe to collect clean air and seal it with a plastic cap , marked as a comparison sample, the air in the syringe of the comparison sample is introduced into a clean container for storage;

[0038] 3. Place the toluene sample and the comparison sample vertically, and record the temperature and pressure of the laboratory;

[0039] 4. Dilute the standard sample with clean air to form a 320ug / ml standard sample series, take 1ml for injection, me...

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Abstract

The invention relates to the technical field of industrial emission, in particular to an infrared light detection method for rapidly detecting industrially discharged toluene. The method comprises the following steps of accurately extracting a toluene gas by using a microsyringe, and injecting the toluene gas into the syringe; at an industrial waste gas part, extracting the field air through an injector and marking as a waste gas sample; collecting the clean air by using the injector, and marking the clean air as a contrast sample; diluting a standard sample into a plurality of standard sample series by using the clean air, respectively sampling, and measuring the retention time and peak area by using a gas chromatograph; and determining the exhaust gas sample and the control sample by using the operation conditions for determining the standard sample series. According to the infrared light detection method for rapidly detecting the industrially discharged toluene, the toluene in the air is collected by using the microsyringe, and is directly fed into the gas chromatography and a hydrogen flame ionization detector for determination, so that the effect is good, the reproducibility of the method is better, and meanwhile, other substances in the air do not interfere with the determination under the conditions of the method.

Description

technical field [0001] The invention relates to the technical field of industrial emissions, in particular to an infrared light detection method for rapidly detecting toluene emitted by industries. Background technique [0002] Toluene, an organic compound with a chemical formula of C7H8, is a colorless, volatile liquid with a special aroma. Has strong refraction. It is miscible with ethanol, ether, acetone, chloroform, carbon disulfide and glacial acetic acid, and very slightly soluble in water. Flammable, vapor can form explosive mixture with air, and the volume concentration of the mixture can explode when the volume concentration is in a low range. High concentrations of gas are anesthetic and irritating. [0003] When industrial waste gas or waste water is discharged, toluene is generally discharged together. If the toluene cannot be accurately and quickly measured during discharge, it is very easy to cause danger. Therefore, an infrared light detection method for qu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3504
CPCG01N21/3504
Inventor 常乐陈晨成毅恒梁凯燕程道建许文波
Owner YANGTZE DELTA REGION INST OF UNIV OF ELECTRONICS SCI & TECH OF CHINE HUZHOU
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