论文部分内容阅读
采用HNO_3-HCIO_4消解体系,火焰原子吸收光谱法(FAAS)和氢化物发生-原子荧光光谱法(HG-AFS)测定了隆回金银花中13种微量元素Fe、Cu、Zn、Mn、Ni、Pb、Cd、Cr、As、Sb、Se、Sn、Hg的含量,试样中各元素测定的相对标准偏差(RSD)为0.86%—4.36%,加标回收率为90.0%—106.2%,方法快速、准确、灵敏度高,适用于金银花中微量元素含量的测定。同时考察了微波提取、超声提取和传统煎煮法对金银花中13种微量元素溶出的情况。结果表明:金银花溶出液中含量较多的元素顺序为:Mn>Se>Zn>Cu>Fe,其余元素的含量均很少;微波萃取法在有效成分的提取中具有快速、高效、安全等特点。
The contents of trace elements Fe, Cu, Zn, Mn, Ni and Pb in Lonicera japonica Thunb. Were determined by HNO_3-HCIO_4 digestion system, flame atomic absorption spectrometry (FAAS) and hydride generation-atomic fluorescence spectrometry (HG-AFS) , Cd, Cr, As, Sb, Se, Sn and Hg. The relative standard deviations (RSDs) of each element in the sample were 0.86% -4.36%, and the recoveries were 90.0% -106.2% , Accurate, high sensitivity, suitable for the determination of trace elements in honeysuckle. The effects of microwave extraction, ultrasonic extraction and traditional decoction on the dissolution of 13 trace elements in honeysuckle were also investigated. The results showed that the order of the elements in the solution of Lonicera japonica Thunb was more: Mn> Se> Zn> Cu> Fe, and the contents of other elements were very few. Microwave extraction was rapid, efficient and safe in the extraction of active ingredients .