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《化学分析计量》 2020年第02期
DOI:10.3969/j.issn.1008-6145.2020.02.022
石墨炉原子吸收法测定土壤中铅、镉、钴、锑、铍
焦二虎
河南省驻马店水文水资源勘测局,河南驻马店 463000 
Determination of lead, cadmium, cobalt, antimony and beryllium in soil by graphite furnace atomic absorption spectrometry
JIAO Erhu
Zhumadian Bureau of hydrology and water resources of Henan Province, Zhumadian 463000, China 
摘要:建立石墨炉原子吸收法测定土壤中铅、镉、钴、锑、铍含量的方法。优化了石墨炉原子吸收光谱法测定条件,在最佳实验条件下,采用硝酸-盐酸-氢氟酸-双氧水混合酸体系微波消解土壤样品,选用抗坏血酸-硝酸镁混合溶液为基体改进剂。铅、镉、钴、锑、铍的质量浓度在各自的范围内与吸光度成良好的线性关系,相关系数均大于0.999,各元素的检出限为0.008~0.06 μg/g。样品加标回收率为90.5%~104.0%,测定结果的相对标准偏差均小于2.5%(n=6)。该方法样品前处理简便,灵敏度高,检出限低,测定结果准确、可靠,可用于土壤中铅、镉、钴、锑、铍的测定。 
Abstract:A method for the determination of lead, cadmium, cobalt, antimony and beryllium in soil by graphite furnace atomic absorption spectrometry was established. Under the best experimental conditions, the mixture of nitric acid, hydrochloric acid, hydrofluoric acid and hydrogen peroxide was used for microwave digestion of soil samples, and the mixture of ascorbic acid and magnesium nitrate was used as matrix modifier. The mass concentration of lead, cadmium, cobalt, antimony and beryllium had a good linear relationship with absorbance in their respective range, the correlation coefficients were all more than 0.999, and the detection limit of each element was 0.008-0.06 μg/g. The recovery of the standard addition of the sample was 90.5%-104.0%, and the relative standard deviation of determination results was less than 2.5%(n=6). The method has the advantages of simple pretreatment, high sensitivity, low detection limit, accurate and reliable results, and it can be used for the determination of lead, cadmium, cobalt, antimony and beryllium in soil. 
关键词:土壤;重金属;微波消解;石墨炉原子吸收法 
Keywords:soil; heavy metals; microwave digestion; graphite furnace atomic absorption spectrometry 
本文引用格式:
焦二虎. 石墨炉原子吸收法测定土壤中铅、镉、钴、锑、铍[J]. 化学分析计量,2020,29(2):95-97.
JIAO E H. Determination of lead,cadmium,cobalt,antimony and beryllium in soil by graphite furnace atomic absorption spectrometry[J]. Chemical analysis and meterage,2020,29(2):95-97. 

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