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Gas chromatography detecting method for content of nonylphenol polyoxyethylene ether in tanning agent

A kind of nonylphenol polyoxyethylene ether, the technology of gas chromatography

Inactive Publication Date: 2018-08-28
XUZHOU HONGFENG HIGH MOLECULAR MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, liquid chromatography-mass spectrometry and gas chromatography-mass spectrometry are expensive and costly to detect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment one: the gas chromatographic detection of NPEO content in the degreasing agent for tanning

[0023] (1) Sample dissolution

[0024] Accurately weigh 0.5 g (accurate to 1 mg) of sample into a 50 mL glass beaker, mix with about 1 g of anhydrous sodium sulfate, dissolve the sample in the beaker with 20 mL of chromatographically pure acetonitrile for 3 times, separate the liquid in the beaker and Combined, then filtered through a 0.45 μm polyamide filter membrane into a 25 mL volumetric flask, then dilute to the mark with chromatographically pure acetonitrile, and shake well;

[0025] (2) Chemical cracking treatment of sample liquid

[0026] Accurately pipette 10 mL of the filtrate, add it to a 50 mL flat-bottomed flask, and then add 4 g of cleavage reagent (aluminum: iodine: anhydrous calcium sulfate = 1:8:1, mass ratio) to the flask. Reflux reaction for 50~55 min;

[0027] (3) Purification

[0028] Take out the flask, carefully drop 8~10 drops of distilled ...

Embodiment 2

[0034] Embodiment 2: the gas chromatography detection of NPEO content in the leveling agent for tanning

[0035] (1) Sample dissolution

[0036] Accurately weigh 0.5 g (accurate to 1 mg) of the sample into a 50ml glass beaker, mix with about 1 g of anhydrous sodium sulfate, dissolve the sample in the beaker with 20 mL of chromatographically pure acetonitrile for 3 times, separate the liquid in the beaker and combine , and then filter it into a 25 mL volumetric flask with a 0.45 μm polyamide filter membrane, then dilute to the mark with chromatographically pure acetonitrile, and shake well;

[0037] (2) Chemical cracking treatment of sample liquid

[0038] Accurately pipette 10 mL of the filtrate, add it to a 50 mL flat-bottomed flask, and then add 4 g of cleavage reagent (aluminum: iodine: anhydrous calcium sulfate = 1:8:2, mass ratio) to the flask, at a temperature of 90 °C Reflux reaction for 50~55 min;

[0039] (3) Purification

[0040] Take out the flask, carefully dro...

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Abstract

The invention discloses a gas chromatography detecting method for the content of nonylphenol polyoxyethylene ether in a tanning agent, and relates to the field of analysis and testing. The method includes the steps of sample dissolution, chemical degradation treatment of sample liquid, purification by a solid-phase extraction column, gas chromatography detecting and comparison with a standard working curve to obtain the concentration value of nonylphenol polyoxyethylene ether. The method is convenient to operate, low in cost, high in reproducibility and accurate in qualitative process, and thecontent of nonylphenol polyoxyethylene ether in the tanning agent can be accurately detected without the aid of expensive gas chromatography-mass spectrometers or liquid chromatography-mass spectrometers. Compared with an existing testing technology, the method is low in cost and accurate and reliable in result when the concentration of nonylphenol polyoxyethylene ether in the tanning agent is detected.

Description

【Technical field】 [0001] The invention belongs to the field of analysis and testing, and in particular relates to a gas chromatography detection method for nonylphenol polyoxyethylene ether, especially for the detection of the concentration of nonylphenol polyoxyethylene ether in a tanning auxiliary. 【Background technique】 [0002] Nonylphenol polyoxyethylene ether (NPEO) is a nonionic surfactant, because of its excellent emulsification, dispersion and decontamination functions, and low cost, it is widely used in leather, paper, dyeing and finishing, chemicals, pesticides and many other industrial processes. In the tanning industry, NPEO used to be the main ingredient in tanning auxiliary products (such as degreasing agent, leveling agent, water soaking agent, liming agent, antifungal agent, etc.). At present, tens of thousands of tons of NPEO are used every year all over the world, and my country is a big user of NPEO. The used NPEO basically completely enters into the wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06G01N2030/062
Inventor 陈治军马贺伟龙忠珍石磊
Owner XUZHOU HONGFENG HIGH MOLECULAR MATERIAL CO LTD
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