离子色谱法测定乌龙茶叶中的F^-、NO_2^-、NO_3^-

DETERMINATION OF F^- , NO_2^- AND NO_3^- IN WULONG TEAS BY ION CHROMATOGRAPHY

应用离子色谱法测定乌龙茶叶中的F^-、NO_2^-和NO_3^-。测得3种样品中F^-、NO_2^-和NO_3^-的含量分别为1.19～1.75、0.000～0.020和0.024～0.058 mg/g,加标回收率分别为94.9％、96.7％和93.4％。

F- , NO2- and NO3- in Wulong teas were determinated by ion chromatography. The concentrations of F- , NO2and NO3 of the anions in the teas was 1. 19 - 1. 75 mg/g, 0-0. 020 mg/g and 0. 024 - 0. 058 mg/g, the recovery was 94. 9% , 96.7% and 93.4%, respectively.