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微波消-石墨炉原子吸收法测定鲨鱼肝脏中的痕量镉
引用本文:翁棣.微波消-石墨炉原子吸收法测定鲨鱼肝脏中的痕量镉[J].光谱学与光谱分析,2006,26(11):2147-2149.
作者姓名:翁棣
作者单位:浙江大学环境与资源学院,浙江,杭州,310029
摘    要:采用石墨炉原子吸收法直接测定鲨鱼肝脏中的痕量镉,试验发现,在HNO3-H2SO4-HClO4体系、HNO3-H2O2体系、HCl-HNO3体系、HF-HClO4体系中,以HF-HClO4体系消化效果最佳,经试验,0.2 g样品用1 mL HF,2 mL HClO4消溶效果较好.以HF-HClO4体系为消化试样、微波消解,用Pd(NO3)2作基体改进剂,灰化温度1 000℃,原子化温度2 200℃.该方法相对标准偏差为1.5%,标准物质测定值在其推荐值范围内,该方法快速、简便、准确.

关 键 词:微波消解  石墨炉原子吸收分光光度法  鲨鱼肝脏  
文章编号:1000-0593(2006)11-2147-03
收稿时间:2005-10-08
修稿时间:2006-01-06

GFAAS Determination of Trace Amount Cadmium in Shark Liver after Microwave Digestion
WENG Di.GFAAS Determination of Trace Amount Cadmium in Shark Liver after Microwave Digestion[J].Spectroscopy and Spectral Analysis,2006,26(11):2147-2149.
Authors:WENG Di
Institution:School of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310029, China
Abstract:In the present work, a method was developed for the determination of cadmium in shark liver by means of graphite furnace atomic absorption spectrometry with microwave digestion, and a systematic study was carried out by selection of the most appropriate working conditions and optimization of the sample mass. The samples were digested by microwave with mixed acid of HF-HCIO4 (1:2). Trace amount cadmium was determined by graphite furnace atomic absorption spectrometry (GFAAS) with Pd(NO3)2 as a matrix modifier. If appropriate working conditions are chosen, the method finally proposed shows interesting features for the determination of the analyte in the samples such as: suitable precision values. To assure the analytical quality, porcine liver GBW 08551 was used as a standard reference material. The measured values were in a good agreement with the certified ones within the analytical error of +/-10%. The method is simple and rapid with accurate results.
Keywords:Microwave digestion  Graphite furnace atomic absorption spectrometry  Shark liver  Cadmium
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