基体改进剂对重楼中砷·汞含量测定的影响

Influence of Matrix Modifier on the Content Determination of Arsenic and Mercury in Rhizoma Paridis

[目的]探讨重楼中微量元素砷、汞含量的测定方法,为重楼药材毒副作用评价体系提供参考。[方法]采用石墨炉原子吸收光谱法(GFAAS),通过对基体改进剂硝酸镍、氯化钯的用量,酸性介质,灰化温度,原子化温度等试验参数进行优化,探索了基体改进剂对重楼中砷、汞含量测定的影响。[结果]加入硝酸镍、氯化钯不仅能提高砷、汞的灰化温度和原子化温度,还能提高测定的灵敏度和精密度,且重现性好。[结论]加入基体改进剂的方法快速、可靠,为重楼中砷、汞含量测定提供了一种简便有效的方法。

[Objective] A method for the determination of trace elements Arsenic and mercury in Rhizoma Paridis was discussed,which provided a reference for evaluating system of toxic and side-effect of Rhizoma Paridis. [Method] GFAAS was used,matrix modifier of nickel,palladium chloride dosage,acid medium,ashing temperature,atomization temperature and other test parameters were optimized,and the influence of matrix modifier on the content determination of arsenic and mercury in Rhizoma Paridis was explored. [Result ] The results showed that the matrix modifier Ni（NO3）2 and PdCl2 can not only improve ashing temperature and atomization temperature of Arsenic and Mercury,but also improve the sensitivity and precision of determination,and the reproducibility was good. [Conclusion] This method is rapid and reliable. It is a simple and effective method for the determination of trace elements Arsenic and Mercury in Rhizoma Paridis.