石墨炉原子吸收光谱法测定土壤保水剂中的微量镉  

Determination of Trace Cadmium in Soil Water Retaining Agent Samples by Graphite Furnace Atomic Absorption Spectrometry

作　　者：黄锋[1] 卢桂英 

机构地区：[1]云南省昭通市疾病预防控制中心,云南昭通657000 [2]湖南省益阳市产商品质量监督检验研究院,湖南益阳413000

出　　处：《现代科学仪器》2017年第2期98-100,共3页Modern Scientific Instruments

摘　　要：目的：建立石墨炉原子吸收光谱法测定土壤保水剂中镉的方法。方法：用硝酸一盐酸一高氯酸体系进行土壤保水剂样品前处理，对试样分解、灰化及原子化温度进行选择，优化仪器工作参数及石墨炉升温程序。结果：方法检出限为0．00321ag／g，样品加标回收率为97．8％。结论：方法具有分析速度快、灵敏度高、干扰少、操作简便等特点，应用于土壤保水剂中微量镉的测定获得了满意结果。Objective： The method of cadmium determination in soil water retaining agent samples is established by using graphite furnace atomic absorption spectrometric method. Methods： In this paper, soil water retaining agent samples were dealed with using nitric acid - hydrochloric acid -perchloric acid system. The sample decomposition, ashing and atomization temperature, working parameters of the instrument and graphite furnace temperature program were investigated. Results： The limit of quantification is 0.0032gg/g and the recovery rate of cd in soil water retaining agent samples is 97.8%. Conclusion： The method has the characteristics of fast speed, high sensitivity, less interference, simple operation, it is applied to soil water retaining agent samples of cd determination with satisfactory results.

关 键 词：石墨炉原子吸收光谱法 土壤保水剂 镉 

分 类 号：O657.3[理学—分析化学]