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FAAS法测定不同消化方法栽培桔梗中12种金属元素含量的研究
引用本文:薛国庆,韩玉琦,宋海,邸多隆.FAAS法测定不同消化方法栽培桔梗中12种金属元素含量的研究[J].光谱学与光谱分析,2007,27(6):1231-1234.
作者姓名:薛国庆  韩玉琦  宋海  邸多隆
作者单位:1. 河西学院化学系,西部资源环境化学重点实验室,甘肃,张掖,734000
2. 中国科学院兰州化学物理研究所,甘肃,兰州,730000
基金项目:甘肃省科技攻关项目 , 甘肃省教育厅科研项目
摘    要:分别采用湿法、干法和先灰化再用硝酸一高氯酸(ψ,4:1)常压微沸条件下消解桔梗样品,用火焰原子吸收法测定栽培桔梗中的金属元素K,Mg,Ca,Cu,Zn,Mn,Fe,Co,Ni,CA,Cr和Pb含量.研究了不同消化方法对测定栽培桔梗中的金属元素含量的影响以及测定不同元素的仪器最佳工作条件,并做了方法的准确度和精密度考察.结果表明,不同消化方法对测定Mg和Ca有显著影响,不同消化方法测定的栽培桔梗中K,Mg,Ca,Mn,Fe,Cu,Zn的平均含量分别为13 226.32,922.57,1 710.72,9.23,336.66,8.75,19.62μg·g-1;Ni,Co,CA,Cr和Pb未检出.方法的加标回收率为95.45%~105.50%,相对标准偏差(n=9)为0.34%~5.78%.选择先灰化再用混酸消化测定栽培中药材金属元素含量,方法简单易行,结果令人满意.

关 键 词:火焰原子吸收法  栽培桔梗  金属元素
文章编号:1000-0593(2007)06-1231-04
修稿时间:2006-03-282006-06-28

Study on Different Digestion Methods for Determination of Twelve Metal Elements in the Plant Platycodon Grandiflorum(Jacq.)A.DC.by FAAS
XUE Guo-qing,HAN Yu-qi,SONG Hai,DI Duo-long.Study on Different Digestion Methods for Determination of Twelve Metal Elements in the Plant Platycodon Grandiflorum(Jacq.)A.DC.by FAAS[J].Spectroscopy and Spectral Analysis,2007,27(6):1231-1234.
Authors:XUE Guo-qing  HAN Yu-qi  SONG Hai  DI Duo-long
Institution:1. Department of Chemistry, Key Laboratory of Resources and Environment Chemistry of West China, Hexi University, Zhangye 734000, China; 2. Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
Abstract:In the present paper the effects of different digestion methods on determining the amount of metal elements in the plant platycodon grandi florum (Jacq.) A. DC. by flame atomic absorption spectrophotometry(FAAS) are reported. FAAS method was established for the determination of K, Mg, Ca, Cu, Zn, Mn, Fe, Co, Ni, Cd and Cr and Pb in the plant platycodon grandi florum (Jacq.) A. DC. The samples were incinerated and followed by digestion with HNO3-HClO (phi, 4 : 1) at 90-95 degrees C and normal pressure. In the meantime, the optimum parameters of FAAS and effects of solution medium on the results were discussed. The analytical results of K, Mg, Ca, Mn, Fe, Cu and Zn were 13 226.32, 922.57, 1 710.72, 9.23, 336.66, 8.75 and 19.62 microg x g(-1) respectively, while Co, Ni, Cd, Cr and Pb were not checked out in the samples. The results showed that the recovery of standard addition was 95.45Y-105.50% and the relative standard deviation (n = 9) was 0.34%-5.78%. The method is quick, simple and convenient, and the results are satisfactory.
Keywords:FAAS  Plant platycodon grandiflorum(Jacq  ) A  DC    Metal element
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