中药材黑芝麻中微量元素分析及其水煎液中汞元素的脱除

目的:普查多种中药材中汞含量,发现受检黑芝麻样品中汞含量达到0.639μg/g,超出中国商务部《药用植物及制剂进出口绿色行业标准》(WM/T2-2004)中的规定水平,其溶出率为17.5%。因此,对黑芝麻及水煎液中11种微量元素(Fe、Mn、Cu、Ni、Co、Se、Mo、Hg、As、Cd、Pb)进行测定,探讨巯基滤纸脱除黑芝麻水煎液中汞元素的可行性。方法:采用高压密封消解法消解样品,电感耦合等离子体质谱法(ICP—MS)测定微量元素含量,利用自制巯基滤纸过滤黑芝麻水煎液,对汞元素进行脱除。结果:铁和锰在黑芝麻中含量较丰富,分别为铁63.64μg/g,锰22.00μg/g;用巯基滤纸过滤黑芝麻水煎液的最大脱除率为76.9%。结论:黑芝麻中微量元素丰富,元素含量超标,巯基滤纸过滤脱除Hg的方法具有一定可行性。

Determination of Trace Elements in Semen Sesami Nigrum and Mercury Removal from It''''s Water Decoctions

Objective ：Determine the content of mercury of many Traditional Chinese herbal medicine（TCHM）, the result of mercury of Semen Sesami Nigrum is 0.639 μg /g, the content of Hg is high of the requirement listed in Green Trade Standards of Importing ＆ Exporting Medicinal plants ＆ Preparations （WM/T2 - 2004, China）, the rate of dissolution is 17.5 %. Therefore determine eleven trace elements of Semen Sesami Nigrum and the decoction （ involving Fe, Mn, Cu, Ni, Co, Se, Mo, Hg, As, Cd, Pb）, test a effect for the removal of mercury from the decoctions by suIfhydryl-filters. Methods ：The ICP-MS combined with pressurized sample digestion were used to analyzed the content of eleven trace elements in Semen Sesami Nigrum and it＇s decoction, removal of mercury by sulfhydryl-filters filtrating from the decoctions. Results ：The contents of Fe and Mn are the highest in eleven trace elements, the content of Fe is 63.64 μg/g and Mn is 22.00 μg/g; Using sulfhydryl- filter filtrated the decoctions, the biggest removal rate is 76.9 %. Conclusion： Semen Sesami Nigrum is rich in trace elements, but the content of mercury exceed the standard in our research. The method of sulfhydryl- filter removal of mercury from Semen Sesami Nigrum＇s decoctions is feasible.