电感耦合等离子体质谱法测定松潘地产大黄药材中重金属元素

Content Determination of Heavy Metal Elements in Rhubarb from Songpan County of Sichuan Province Using Inductively Coupled Plasma-Mass Spectra

目的测定松潘地产大黄药材中的铅、镉、汞、铜、砷5种重金属元素含量,从重金属含量是否超标的角度评价该地区大黄药材的安全性。方法微波消解法处理药材样品,电感耦合等离子体质谱法检测松潘地区不同产地、不同栽培方法的大黄药材中5种重金属元素的含量。结果 5种元素的检出限范围为0.02～0.30ng/ml;各元素线性相关系数均达到0.999 1;采自该地区的20批大黄药材样品中,上述5种重金属元素含量均低于国家限量标准。结论从重金属元素含量不超标的角度,可以推断松潘地产大黄作为药用较为安全,松潘地区适宜发展大黄药材的栽培种植。

Objective To determine the contents of plumbum （Pb）, cadmium （Cd）, hydrargyri （Hg）, cuprum （Cu） and arsenic （As） in rhubarb from Songpan county of Sichuan province,in an attempt to evaluate the safety of rhubarb based on whether or not the contents of heavy metal elements are out of limits. Methods Rhubarb samples were processed by microwave digestion （MVD）. The contents of five heavy mental elements in rhubarb from different areas and cultivations were detected by inductively coupled plas- ma-mass spectra （ICP-MS）. Results The detection limits of five heavy metal elements ranged from 0.02 to 0.30 ng/ml. This method had good linear correlation for each element （r〉0. 999 1）. The contents of five heavy metal elements from 20 samples of rhubarb were within the limits of national standards. Conclusion Based on the contents of heavy metal elements being within the limits,it can be concluded that rhubarbs from Songpan county are safe for medicine,and Songpan area is suitable for the cultivation of rhubarbs.