Yao Zhi-gang
2004
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Journal
The Chemical Engineer
Abstract
A method for the determination of 3-amino-4-chlorobenzonic acid was established by high performance liquid chromatography with a Kromasil C_ 18 column and a UV detector. The mixture of methanol-0.05% orthophosphoric acid in water (65:35 by volume) was used as a mobile phase with the flow rate at 1.2mL·min -1 .The eluate was detected at λ=254nm. The calibration curve was linear over the range of concentration from 0.08 to 0.40×10 -4 g·L -1 ,the mean recovery was 101%(RSD=0.98%,n =6).The method is simple and accurate.