Method for determining contents of TMG by utilizing gas chromatography

A technology of gas chromatography and gas chromatographic analysis, which is applied in the field of determining TMG content by gas chromatography, and achieves the effects of simple method, high sensitivity and accurate method

Inactive Publication Date: 2019-01-08
CHAMBROAD CHEM IND RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, gas chromatography is used more and more in analysis and detection, but there are few reports on the quantitative analysis method of TMG, and in the actual production process, the monitoring of TMG has important guiding significance

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  • Method for determining contents of TMG by utilizing gas chromatography
  • Method for determining contents of TMG by utilizing gas chromatography
  • Method for determining contents of TMG by utilizing gas chromatography

Examples

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Embodiment 1

[0067] There is a batch of TMG samples with an unknown concentration, about 10%, which need to be determined. Gas chromatography is used for detection and internal standard percentage method for quantitative analysis. The specific steps include:

[0068] 1. Prepare TMG standard solution: Accurately weigh 0.05g, 0.1g, 0.15g, 0.2g, 0.25g (accurate to 0.0001) of TMG standard samples respectively in 10mL volumetric flasks, add internal standard dimethyl phthalate respectively Esters 0.05g, dilute to the mark with dimethyl carbonate to obtain standard solutions I, II, III, IV, V, the concentrations are 5000mg / L, 10000mg / L, 15000mg / L, 20000mg / L, 25000mg / L respectively ;

[0069] 2. Prepare TMG sample solution: According to the approximate content range of TMG in the sample, accurately weigh an appropriate amount of sample (accurate to 0.0001g), such as 0.5g in a 10mL volumetric flask, add 0.05g of internal standard dimethyl phthalate , dimethyl carbonate to the scale, to obtain a T...

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Abstract

The invention provides a method for determining 1,1,3,3-tetramethyl guanidine (called as TMG form short) by utilizing a gas chromatography (GC). According to the method, a conventional gas chromatograph is adopted, a 19091J-413, HP-5 chromatographic column is taken as a separation column, nitrogen is taken as carrier gas, the TMG is taken as a standard sample, an internal standard percentage method is adopted to draw a content ratio-peak area ratio standard curve so as to obtain a linear regression equation, and calculation is carried out through the regression equation to obtain the contentsof the TMG in to-be-determined samples. The method is capable of effectively separating and detecting TMG organic alkali catalysts, and is short in analysis time, simple, feasible, convenient and reliable.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis, and in particular relates to a method for measuring TMG content by gas chromatography. Background technique [0002] Tetramethylguanidine, referred to as TMG, is a strong organic base catalyst, widely used in industry, mainly used as a cosolvent for the synthesis of new antibiotic cephalosporins; it can also be used as a solvent for polyurethane foam Catalyst; it can also be used for level dyeing of nylon (nylon), wool and other proteins to improve their durability. It is of great significance for the continuous production to select the best detection method to quickly analyze its accurate content. [0003] At present, gas chromatography is used more and more in analysis and detection, but there are few reports on the quantitative analysis method of TMG, and in the actual production process, the monitoring of TMG has important guiding significance. The chemical production process is m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
CPCG01N30/02
Inventor 郭艳萍马韵升王岳华李霞邢丽莉吕印美董淑杰
Owner CHAMBROAD CHEM IND RES INST CO LTD
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