短柄五加中的无机元素及Ca/Mg、Cu/Zn含量比值的分析研究

目的:测定短柄五加地上部分中的无机元素。方法:采用微波辅助消解-ICP-AES法同时测定14个无机元素(Ca、Na、Al、Mn、Cu、Pb、Zn、Mg、Fe、Ba、Cd、As、Ni和Se),探讨了微波消解功率、消解剂的比例和用量、消解时间等因素对各元素测定的影响,优选了最佳消解条件,并对Ca/Mg和Cu/Zn含量比值进行了分析。结果:短柄五加中含有多种对人体有益的无机元素,且Ca/Mg和Cu/Zn含量比值分别为1.5487和0.9121,加标回收率为97.6%～104.2%,RSD(n=3)≤3.9%,检出限≤0.043μg.mL-1。结论:该方法简单、快速,灵敏度高,准确性好,可同时测定短柄五加中的多种无机元素。

Study on of inorganic elements and content ratios of Ca to Mg and Cu to Zn in Acanthopanax brachypus Harms

Objective: To determine inorganic elements in the aerial part of A.brachypus Harms.Methods: Fourteen kinds of inorganic elements(Ca,Na,Al,Mn,Cu,Pb,Zn,Mg,Fe,Ba,Cd,As,Ni and Se) were simultaneously determined by microwave-assisted digestion-ICP-AES,the influence factors(such as digestion power,amount and proportion of digestion solvent,digestion time,etc.) on various elements determination were investigated,the digestion condition was optimized,and the content ratios of Ca/Mg and Cu/Zn were analyzed.Results: A.brachypus Harms contains a variety of inorganic elements which are beneficial to human body.The content ratios of Ca/Mg and Cu/Zn were 1.5487 and 0.9121,respectively.The recoveries were in the range of 97.6%-104.2 % with RSD(n=3) ≤3.9%,and detection limit was less than 0.043 μg·mL-1.Conclusion: The method is simple,rapid,with high sensitivity,good accuracy and can simultaneously determine many elements in A.brachypus Harms.