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Method for determining acetone in air

An acetone and air technology, applied in the field of environmental pollutant detection, can solve the problems of interference in qualitative and quantitative analysis, peaks cannot be effectively separated, etc., and achieve the effect of avoiding interference in qualitative and quantitative, good accuracy, and simple and convenient operation

Inactive Publication Date: 2018-06-29
四川环科检测技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the gas chromatography of benzene series is used to measure the content of acetone in the air, the peak of acetone and the peak of carbon disulfide cannot be effectively separated, which interferes with the qualitative and quantitative analysis in the detection process

Method used

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  • Method for determining acetone in air
  • Method for determining acetone in air
  • Method for determining acetone in air

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: a kind of method for measuring acetone in the air comprises the following steps, step 1, sample collection, gac sampling pipe is with a long 7cm, external diameter 6mm, the glass tube of internal diameter 4mm, filling two parts 20 / 40 mesh gacs, Pack 100mg in the absorbent part and 50mg in the rear, separated by 2mm urethane foam in the middle, stuffed with 3mm urethane foam in the back of the tube, and a dollop of silanized in the front of the tube glass wool. Both ends of the glass tube are sealed with fire. Activated carbon was treated with nitrogen at 600 °C for 1 h before loading into the tube. Use a rubber tube to connect the activated carbon sampling tube to the sampler. When sampling, the activated carbon sampling tube is vertically upward for sampling. The sampling flow rate is 0.5L / min, and the sampling time is 20-120min. Keep refrigerated.

[0025] Step 2, chromatographic conditions, use a capillary column, the specifications of the capillary ...

Embodiment 2

[0032] Embodiment 2: a kind of method of measuring acetone in the air comprises embodiment 1, and the capillary column among the embodiment 1 is SE-30 capillary chromatographic column.

Embodiment 3

[0033]Embodiment 3: a kind of method for measuring acetone in the air comprises the following steps, step 1, sample collection, gac sampling pipe is with a long 7cm, external diameter 6mm, the glass tube of internal diameter 4mm, filling two parts 20 / 40 mesh gacs, Pack 100mg in the absorbent part and 50mg in the rear, separated by 2mm urethane foam in the middle, stuffed with 3mm urethane foam in the back of the tube, and a dollop of silanized in the front of the tube glass wool. Both ends of the glass tube are sealed with fire. Activated carbon was treated with nitrogen at 600 °C for 1 h before loading into the tube. Use a rubber tube to connect the activated carbon sampling tube to the sampler. When sampling, the activated carbon sampling tube is vertically upward for sampling. The sampling flow rate is 0.5L / min, and the sampling time is 20-120min. Keep refrigerated.

[0034] Step 2, chromatographic conditions, use a capillary column, the specifications of the capillary c...

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Abstract

The invention discloses a method for determining acetone in air. The method comprises the steps as follows: step 1, sample collection: sampling is performed with an activated carbon sampling pipe; step 2, chromatographic conditions: a capillary column is used, the column temperature is kept at 50 DEG C for 1 min, then, the temperature is increased to 80 DEG C at the speed of 2 DEG C / min, the flowof capillary column carrier gas is 30 mL / min, the temperature of a detector is 120 DEG C, the temperature of an injection port is 250 DEG C, the hydrogen flow is 46 mL / min, and the air flow is 400 mL / min; step 3, preparation of a standard curve; step 4, sample determination. The method comprises the advantages and effects as follows: the column temperature in the chromatographic conditions is changed and the column temperature of the capillary column is increased from constant temperature, so that carbon disulfide peaks can be separated from acetone peaks effectively, and interference of qualitative and quantitative operation can be avoided. The capillary column has the specification of 30 m, inner diameter of 0.32 mm and membrane thickness of 0.5 mu m, all components in the sample can beeffectively separated, and the method has the effects of separation of carbon disulfide peaks from acetone peaks, good accuracy during detection and simplicity and convenience in operation.

Description

technical field [0001] The invention relates to the technical field of environmental pollutant detection, in particular to a method for measuring acetone in air. Background technique [0002] Acetone is a colorless, transparent dilute liquid with a slight aroma. It is mainly used in industries such as explosives, plastics, rubber, paint coatings, dyes, silk processing, and tanning. It is also used as decontamination of lubricating oil and cloth grease. It can be used not only as a basic organic chemical raw material, but also as a cleaning solvent widely used in industry and laboratories. Acetone is a low-toxic, flammable and dangerous chemical, mainly used in the central nervous system, and its vapor can irritate the eyes and respiratory tract. my country's relevant health standards stipulate the maximum allowable concentration of acetone in the air of workshops and the atmosphere of residential areas. [0003] The determination of acetone in exhaust gas is briefly descri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/30G01N30/02G01N30/06
Inventor 姜琴赵雅静
Owner 四川环科检测技术有限公司