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Residual Analysis of Zineb in Radix Isatidis and Folium Isatidis

PANG Zuo-zheng1,2,XUE Jian1,SUN Hui2,WU Xiao-bo1, XUE Wen2,HUANG Xiao-hui1(1.Medicinal Plants Research Institute,Chinese Academy of Medical Sciences,Beijing 100193; 2.College of Pharmacy,Heilongjiang University of Traditional Chinese Medicine,Harbin 150040)  
A headspace gas chromatography method(flame photometric detector) for determining zineb in Radix Isatidis and Folium Isatidis was developed.Good linearity of zineb was obtained over the range of 0.1~5 mg/kg(R2=0.9985) with the recoveries from 80.6% to 115.2%,and variation coefficient from 4.8% to 9.0%,respectively.The concentration detectable limit was 0.01 mg/kg.
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