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Detection method for N,N-dimethyl formamide in leather

A technology of dimethylformamide and a detection method, which is applied in the field of chemical detection, can solve problems such as complex devices and unsuitability for the detection of a large number of samples, and achieve reliable results, simple pretreatment procedures, and good extraction effects

Inactive Publication Date: 2014-11-26
广州衡创测试技术服务有限公司
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Problems solved by technology

However, the device used in this method is complicated and not suitable for the detection of a large number of samples.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0018] A kind of detection method of N,N-dimethylformamide in leather, comprises the following steps:

[0019] (1) Take 10g of the sample from a representative part of the leather, cut it into 2mmx2mm pieces and mix evenly, weigh 1.00g of the sample pieces into a 50mL screw cap test tube for use;

[0020] (2) Add 10 mL of acetone to the above test tube to prepare an internal standard solution with a concentration of 2 mg / L deuterated anthracene, tighten the cap, and place it in a water bath for ultrasonic extraction;

[0021] (3) Take out the test tube, cool to room temperature, then filter the extract through a 0.22um organic microporous membrane into a 2mL gas chromatographic bottle, and detect it with a gas chromatograph;

[0022] (4) If the test result exceeds the linear range, it needs to be doubled and then analyzed on the computer to calculate the result.

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Abstract

The invention discloses a detection method for N,N-dimethyl formamide in leather. The detection method comprises the following steps: taking 10g of sample from a representative part on leather, cutting the sample into pieces and uniformly mixing, and weighing 1.00g of sample fragments in a 50mL screw covered test tube for later use; adding 10ml of an anthracene internal standard solution which is prepared from acetone and is 2mg / L in concentration to the test tube, tightening up cover and extracting in a water bath through ultrasonic wave; taking out the test tube and cooling to room temperature, filtering an extracting solution through a filtering membrane and adding to a 2mL gas chromatograph bottle, detecting through a gas chromatographic instrument and calculating a result. The detection method disclosed by the invention is not only more reliable in result because the sample is representative, more accurate in quantification by adding the internal standard solution and better in extraction effect by heating to 60 DEG C and extracting through ultrasonic wave, and excellent in extracting N,N-dimethyl formamide in the sample, but also simple in pretreatment process.

Description

technical field [0001] The invention relates to a method for detecting N,N-dimethylformamide in leather, belonging to the technical field of chemical detection. Background technique [0002] N,N-Dimethylformamide has been linked to carcinogenesis in humans and can cause birth defects. In some industrial sectors, women are prohibited from using N,N-dimethylformamide, although the Environmental Protection Agency (EPA) does not consider N,N-dimethylformamide to be a carcinogenic hazard, according to the International Agency for Research on Cancer (IARC ) that N,N-dimethylformamide may be a carcinogen. [0003] N,N-Dimethylformamide is used as a tanning agent in the leather production process. Most leathers contain N,N-dimethylformamide. [0004] At present, for detecting the content of N,N-dimethylformamide in leather, the steam distillation method is mainly used. However, the device used in this method is complicated and is not suitable for the detection of a large number ...

Claims

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Application Information

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IPC IPC(8): G01N30/02
Inventor 陈凯松
Owner 广州衡创测试技术服务有限公司
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