微波消解-原子吸收分光光度法测定土壤中重金属的研究.pdfVIP

安徽农业科学，Journal of Anhui Agri. Sci.2013 ,41 (1 6) :7128 -7129 ,7176 责任编辑刘月销责任校对李岩 微波消解-原子吸收分光光度法测定土壤中重金属的研究 王敏，赵冲厚，张睛，李强 (连云港市海洋环境监测中心，江苏连云港 222001 ) 摘要 [目的]研究微波消解一原子吸收分光光度法测定土壤中重金属的样品前处理过程与方法。[方法]分别采用微波消解和温法消 化法样品前处理方法，结合原子吸收分光光度法，研究土壤中重金属元素含量测定方法，通过标准品的回收率确定样品前处理过程。 [结采]当微波消解过程 HNOJ:HCl:HF 的比例为 8:2:2 时，消解彻底，分析结果精密度高;微波消解法回收率为 90% -1089奋，批间内相对 标准偏差小于5% ，在 0.05 水平显著高于湿法消解的回收率759毛 -829奋。[结论]该法测定结果能够满足试验要求。 关键词 微波消解;湿法消化;重金属 中图分类号 5153.6 文献标识码 A 文章编号 0517 -6611(2013)16 -07128-02 Determination of Heavy Metals in Soil by Microwave Digestion-Atomic Absorption Spectrometry WANG Min et al (Lianyungang Marine Environmental Monitoring Center , Lianyungang , Jiangsu 222001 ) Abstract [ ObjectiveJ The research aimed to study the sample pretreatment process and method about microwave digestion-atomic absorption spectrometηfor the determination of heavy metals in soil. [Method ] The microwave digestion method and wet d悖stion method for sample preparation methods were adopted. Combined with atomic absorption spectrometry for determination of heavy metals in the soil , sample pre- treatment process was determined by recoveηrate. [Result ] The results showed that when HNOJ :HCl: HF ratio in the microwave digestion process was 8:2:2 , recovery rate was in the range of909毛- 108% , relative standard deviation was less than 5% , significantly higher than that of the wet digestion. [ConclusionJ The measuring accuracy could meet the test requirements. Key words Microwave digestion; Wet digestion; Heavy metal 解罐温度降至室温时即可打开消解罐，向罐中加入0.5 rnl 士壤是生态环境的重要组成部分，是农产品生产的载 HCI0 ，放置于 170 t:控温电加热器中，赶酸至样品呈灰白色 体。土壤质量的优劣对农产品食用安全性的影响巨大。然 4