[Determination of 2-methyl-3-nitrobenzoic acid through pretreatment with diazomethane by gas chromatography].
A method for the quantitative determination of 2-methyl-3-nitrobenzoic acid by gas chromatography is described. 2-Methyl-3-nitrobenzoic acid was esterified by pretreatment with diazomethane prior to analysis. A CP-Sil-43CB capillary column(25 m x 0.32 mm i.d. x 0.2 microm), a flame ionization detector and the area normalization method were used. The average recovery was 99.81%. The RSD was 0.08% and the detection limit was 3 x 10(-11) g. The results showed that the method is practical and reliable. It was realized that the higher purity and higher boiler matter was analyzed by gas chromatography. The method can be used to monitor the purity of this type of materials. analysis of research and production. It can be used in the development of new products and in the process.
Xue
Ke-She
KS
Experiment Center of Department of Environmental Science, Northwest University, Xi'an 710069, China. dlxgis@nwu.edu.cn
Nan
Zhi-Xiang
ZX