Detection method of glyoxalic acid, glycolic acid, glyoxal and oxalic acid

A detection method, glyoxylic acid technology, applied in the field of glyoxal and oxalic acid, detection of glyoxylic acid, glycolic acid, can solve the problems of expensive equipment, signal interference and spectral overlap phenomenon can not be overcome, to achieve simple equipment, simple detection method, detection of sensitive effects

Inactive Publication Date: 2003-09-10
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that a variety of chemical reagents are still required for sample pretreatment, and the signal interference and spectral overlap of more complex systems cannot be overcome.
At the same time the equipment required is quite expensive

Method used

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  • Detection method of glyoxalic acid, glycolic acid, glyoxal and oxalic acid
  • Detection method of glyoxalic acid, glycolic acid, glyoxal and oxalic acid
  • Detection method of glyoxalic acid, glycolic acid, glyoxal and oxalic acid

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Example 1: Under given chromatographic conditions, namely YSA type 8098A-2 # Anion chromatographic column (manufactured by Beijing Institute of Chemical Industry and Metallurgy, Ministry of Nuclear Industry); PCD-1 pulsed conductivity detector (manufactured by Xiamen University); G-XYZ-A electrochemical suppression column (manufactured by Xiamen University); A # Eluent: 2.4mmol / L Na 2 CO 3 +3.0mmol / L NaHCO 3 ; Flow rate: 1.5mL / min; Injection volume: 100 μL. Use a rotary six-way valve to inject samples through the filter membrane, inject 100 μL of glyoxylic acid standard solutions of different concentrations, and perform ion chromatography detection according to the experimental method. can be used as figure 1 The process flow of the standard ion chromatography device is composed of eluent tank 1, advection pump 2, sampling valve 3, separation column 4, suppression column 5, conductivity detector 6 and recorder 7, etc. The eluent tank 1, the advection pump 2, and th...

Embodiment 2

[0023] Embodiment 2: the same as the method of embodiment 1, the standard working curve that injects glycolic acid standard solution to obtain is as follows image 3 shown. From image 3 It can be clearly seen that the concentration of glycolic acid measured by this method M / mg L -1 The linear relationship between its standard ion chromatographic peak intensity A, the linear range is 2.0~35.0mg / L, the linear regression equation is Y=-0.9546+3.5883X, and the linear regression coefficient R=0.9996. use B # Eluent: 2.0mmol / L NaOH+0.05mmol / L NaOH 2 CO 3 , the flow rate and the injection volume are the same as in Example 1.

Embodiment 3

[0024] Embodiment 3: the same as the method of embodiment 1, the standard working curve that injects glyoxal standard solution to obtain is as follows Figure 4 shown. From Figure 4It can be clearly seen that the linear relationship between the concentration of glyoxal measured by this method and its standard ion chromatogram peak intensity A, the linear range is 5.0~25.0mg / L, and the linear regression equation is Y=1.2948+1.7854X, Linear regression coefficient R=0.9992. use B # Eluent, flow rate, injection volume are identical with embodiment 2.

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Abstract

The present invention relates to ionic chromatography method of detecting glyoxalic acid, glycolic acid, glyoxal and oxalic acid. The detection includes the steps of: weighing sodium carbonate and sodium bicarbonate and dissolving with deionized water to compound eluting liquid; weighing sodium hydroxide and dissolving with deionized water to compound eluting liquid; weighing sodium hydroxide and dissolving with deionized water to compound eluting liquid; diluting the sample with deionized water to concentration for detection and ionic chromatography detection; comparing the ionic chromatography detection result of the sample with corresponding standard work curve to obtain the composition and contents of the sample. The said method can fast detecting the said components simultaneously in high selectivity and high sensitivity.

Description

(1) Technical field [0001] The invention relates to a method for detecting glyoxylic acid, glycolic acid, glyoxal and oxalic acid by using an ion chromatography conductivity detection method. (2) Background technology [0002] Glyoxylic acid (CHOCOOH) is the simplest alkyd acid, which has both properties of aldehyde and acid. Glyoxylic acid can be used to derive dozens of fine chemical products, which can be used as intermediates of spices, medicines, pesticides, paints, and amino acid fine chemical products; it can also be used in processes such as water-based paints, surfactants, food storage, and polymer synthesis. the cross-linking agent. With the development of the downstream product market of glyoxylic acid, it has become a fine chemical product with good development prospects, and has been widely used at home and abroad. The synthesis method of glyoxylic acid can be divided into chemical method and electrosynthesis method. Due to serious environmental pollution and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/02G01N30/02G01N30/64
Inventor 陈声培孙世刚黄桃张麒
Owner XIAMEN UNIV
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