Gas chromatography method for detecting methoxy acetate in electronic products

A technology of gas chromatography and methoxyacetic acid, which is applied in the detection field of methoxyacetic acid, can solve the problems of restricted use, explosive, high toxicity, etc.

Inactive Publication Date: 2013-08-28
谱尼测试集团深圳有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0003] In the prior art, diazomethane is used for esterification to detect methoxyacetic acid in urine. Due to th

Method used

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  • Gas chromatography method for detecting methoxy acetate in electronic products

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Embodiment

[0018] Example: Determination of Methoxyacetic Acid in Car Seat Leather

[0019] 1. Preparation of Sample Solution

[0020] Car seat cushion leather samples were pulverized by a high-speed freezer pulverizer as samples to be tested. Take 1.0 g (accurate to 0.001 g) of the treated samples, add 8 mL of methanol to a 10 mL volumetric flask, and ultrasonically extract for 1 h. After cooling to room temperature, add methanol to set Allow. Pipette 3mL of the extract into a 15mL glass centrifuge tube, place the centrifuge tube in ice water, add 300μL of concentrated sulfuric acid and mix well, pipette 3mL of methyl tert-butyl ether into the above centrifuge tube, vortex well, and put it in a 50°C water bath Heat in the pot for 2h. Add 7 mL of 150 g / L sodium sulfate aqueous solution after cooling down after the reaction, and vortex to mix well. Use a straw to discard the lower layer solution. When about 0.3 mL of the lower layer solution remains, add 1 mL of saturated sodium bicarb...

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Abstract

The invention relates to a gas chromatography method for detecting methoxy acetate in electronic products. The method comprises weighing pre-treated samples, extracting with organic solvents through ultrasonic, acidifying extracted solution, adding methyl tert-butyl ether, uniformly mixing, performing a methyl ester derivative reaction, after the derivative reaction, filtering the methyl tert-butyl ether layer, analyzing the filtrate with a gas chromatograph, and quantifying with an external-standard calibration curve method, wherein methanol is used as an extraction solvent and a derivative reagent simultaneously, the derivative is easy to prepare, the reagent is easily available, a reaction selectivity is good, the derivative reagent does not disturb separation and detection of target compounds, and a recovery rate is high. The method is good in analysis effect, and accurate and rapid in determination, and can meet needs of detection work.

Description

technical field [0001] The invention relates to a method for detecting methoxyacetic acid, in particular to a method for measuring methoxyacetic acid in electronic and electrical products by gas chromatography. Background technique [0002] Methoxyacetic acid, also known as 2-methoxyacetic acid, methoxyacetic acid, English name methoxy acetic acid, CAS number: 625-45-6, molecular formula CH 3 OCH 2 COOH, with a molecular weight of 90.08, is easily soluble in water, alcohol and ether. Used in organic synthesis, biochemical research, building and equipment cleaners, bathroom disinfectants, paint coatings, vehicle polishes and other fields. It is harmful to the human body and the environment, can disrupt endocrine, and has reproductive toxicity. [0003] In the prior art, diazomethane is used for esterification to detect methoxyacetic acid in urine. Due to the high toxicity and explosiveness of diazomethane in the pretreatment process, the use of diazomethane is limited. Pa...

Claims

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Application Information

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IPC IPC(8): G01N30/02
Inventor 宋薇
Owner 谱尼测试集团深圳有限公司
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