砷钼杂多酸分光光度法测定三七中总砷含量

目的]获得快速检测三七中总砷的方法。方法]采用砷钼杂多酸分光光度法测定人工种植三七中的总砷含量,并优化其显色条件。结果]最佳显色条件：显色剂用量为5.0 ml,显色温度为40℃,显色时间为30 min;AsⅢ标准溶液在浓度为0～0.04μg/ml时,与吸光度呈良好的线性关系（r=0.996 6）;样品中未检测到As。结论]该方法精密度高,稳定性好,可作为三七中砷含量的检测方法。

Determination of As in Panax notoginseng(Burk.)F.H.Chen by Heteromolybdoarsenic Acid Spectrophotometry

Objective] To obtain a rapid determination method for arsenic from Panax notoginseng(Burk.)F.H.Chen.Method] Content of As was determined by heteromolybdoarsenic acid spectrophotometry,and the developing conditions were optimized.Result] The optimum developing conditions were :color developing agent amount of 5.0 ml,color developing temperature of 40 ℃ and developing duration of 30 min.When the concentration of standard AsⅢ solution ranged from 0 to 0.04 μg/ml,the linear relationship between concentration and absorbance was good(r=0.996 6).Arsenic was not detected in sample.Result] High in precision and good in stability,the method can be used as the determination method for As from Panax notoginseng(Burk.)F.H.Chen.