水处理剂聚合硫酸铁中六价铬的检测方法探讨  

Determination of hexavalent chrom in water treatment chemicals-poly ferric sulfate

作　　者：樊正[1] 张荣[1] 

机构地区：[1]安徽省马鞍山市疾病预防控制中心,安徽马鞍山243000

出　　处：《中国卫生检验杂志》2010年第6期1275-1277,1538,共4页Chinese Journal of Health Laboratory Technology

摘　　要：目的:探讨水处理剂聚合硫酸铁中六价铬的检测方法,提高分析结果的准确性。方法:用2 mol/L氢氧化钠溶液对样品进行前处理,采用石墨炉原子吸收法测定六价铬含量并找出最佳实验条件。结果:线性范围0μg/L～50μg/L,相关系数为0.9998,检出限为0.049μg/L,相对标准偏差为1.73%～3.39%,回收率为94.5%,最佳灰化温度1100℃、原子化温度2600℃。结论:方法具有操作简便、快速、检出限低、灵敏度高、结果准确等优点,适合于水处理剂聚合硫酸铁中六价铬的测定。Objective：To develop a method for determination of hexavalent chrom in water treatment chemicals-poly ferric sulfate and advance the veracity of the results.Methods：The pretreatment was performed using 2 mol/L sodium hydroxide solution,Graphite fumace atomic absorption spectrometry was used to determination of hexavalent chrom in this study and the best experimental conditions was found.Results：The linear range was 0 μg/L～50 μg/L,The correlation coefficient was 0.9998.The limits of detection was 0.049 μg/L.The RSD was 1.73%～3.39%.The rate of recovery was 94.5%.The best cineration temperature was 1100℃,atomization temperature was 2600℃.Conclusion：The method has advantages of simple operation,fast determination,low limit of detection,high sensitivity as well as accurate resualts,and therefore is suitable for determination of hexavalent chrom in water treatment chemicals-poly ferric suifate.

关 键 词：水处理剂 聚合硫酸铁 六价铬 氢氧化钠 石墨炉原子吸收法 

分 类 号：O657.31[理学—分析化学]