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对川楝子中Mg、Fe、Sr、Zn、Mn和Cu 6种微量元素的化学形态进行了分析研究。先用传统的煎煮法进行元素提取,然后分别采用0.45μm微孔滤膜、LSA-10大孔吸附树脂柱、正辛醇/水分配体系,依次区分元素的可溶态和悬浮态、有机态和无机态、醇溶态和水溶态,最后用电感耦合等离子体-原子发射光谱法(ICPAES)对湿法消解后的各种元素进行测定。结果表明:6种元素的提取率在16.6%~64.4%,悬浮态的颗粒吸附率在2.4%~27.9%,加标回收率在94.7%~103.7%,检出限为2.0~7.2μg/L,RSD≤5.1%。
The chemical forms of 6 trace elements of Mg, Fe, Sr, Zn, Mn and Cu in Toosendan sinensis were analyzed. The first element was extracted by traditional decoction method, and then were separated by 0.45μm microporous membrane, LSA-10 macroporous resin column and n-octanol / water partitioning system, respectively, to distinguish between soluble and suspended elements, organic State and inorganic state, alcohol-soluble state and water-soluble state. Finally, the various elements after wet digestion were determined by inductively coupled plasma atomic emission spectrometry (ICPAES). The results showed that the extraction rates of the six elements ranged from 16.6% to 64.4%, the adsorption rates of suspended particles from 2.4% to 27.9% and the recoveries from 94.7% to 103.7% with the detection limits of 2.0-7.2 μg / L , RSD≤5.1%.