HPLC Analysis of Salicylamide,Salicylonitrile,and Salicylic Acid in Salicylonitrile Production Wastewater
A high-performance liquid chromatography analysis method for three characteristic pollutants,salicylamide,salicylonitrile,and salicylic acid,in salicylonitrile wastewater was established.A C18 reversed-phase chromatographic column was selected with the detection wavelength of 235 nm and the mobile phase of acetonitrile-water(0.1％phosphoric acid in water)(V∶V=25∶75),and the isocratic elution method was used to effectively separated and quantitatively detected the salicylamide,salicylonitrile,and salicylic acid in the wastewater.The standard deviations were 0.16,0.22,and 0.27,and the relative deviations were 0.41％,0.15％,and 0.10％.The average addition recovery rates were 100.74％,99.29％,and 98.99％,respectively.The linear correlation coefficients of salicylamide,salicylonitrile,and salicylic acid in the method were 0.999 85,0.999 88,and 0.999 86,respectively.The method has good linearity and high precision,and it can meet the requirements of rapid and accurate quality control detection in salicylonitrile wastewater pretreatment process.
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