20%辛硫·三唑磷乳油的高效液相色谱分析

Analysis for Phoxim+Triazophos 20% EC by HPLC

建立了在相同的液相色谱条件下测定混剂中三唑磷、辛硫磷有效成分含量的方法。本方法采用XTerra RP18柱,以甲醇、水溶液(75:25,V/V)为流动相,在波长261nm下,外标法对试样中的三唑磷、辛硫磷进行定量分析。分析结果表明,三唑磷、辛硫磷的线性相关系数分别为0.9994、0.9990;标准偏差分别为0.063、0.060;变异系数分别为0.63%、0.60%;平均回收率分别为101.4%、95.9%。

A HPLC method was developed for the determination of phoxim＋triazophos 20% EC. The HPLC conditions were XTerra RP18 （4.6 mm＋ 150 mm） column, methanol - water （75 ： 25, v/v） as mobile phase, and UV detection at 261 nm. The results showed that the variation coefficients of triazophos and phoxim were 0.63% and 0.60%, the standard deviations were 0.063 and 0.060, the average recoveries were 101.4% and 95.9%, and the linear correlations were 0.999 4 and 0.999 0, respectively.