原子吸收分光光度法测定铅的两种前处理方法 比较研究
目的 探讨干法灰化和湿法消解2种方式对测铅处理的影响。方法 用2个不同浓度的铅标准溶液作为样品, 采用干法灰化与湿法消解对其进行前处理, 并用原子吸收分光光度计进行检测, 通过计算回收率和采用统计技术中经典Z值来确定2种方式的优劣。结果 干法灰化平均回收率87.52%, 回收率在85.45%~88.75% 之间; 湿法消解平均回收率99.03%, 回收率在96.12%~102.35%之间。通过对2种方法的回收率进行经典Z值计算, 干法灰化的Z值是10.14, 不可接受; 湿法消解的Z值是0.44, 结果良好。结论 证明湿法消解比干法灰化的效果更好。
Objective To discuss the influence of the 2 kinds of ways of dry ashing and wet digestion to measure lead processing. Methods Dry ashing and wet digestion were used as pretreatment with 2 kinds of different concentrations of lead standard solution as the sample, and tested by atomic absorption spectrophotometry; the calculation of recovery and statistical techniques in classic Z value were used to determine the merits of the 2 kinds of ways. Results Dry ashing average recovery was 87.52%, the recovery was between 85.45%~88.75%; Wet digestion average recovery was 99.03%, the recovery was between 96.12%~102.35%. Through the Z value calculation of recovery rate of the 2 kinds of methods, Z value was 10.14 by dry ashing, and it was not acceptable; Z value was 0.44 by wet digestion, and the result was good. Conclusion It was proved that the result of wet digestion was better than that of dry ashing.
标题：原子吸收分光光度法测定铅的两种前处理方法 比较研究
英文标题：Comparative study of 2 kinds of different pretreatments in determination of lead by atomic absorption spectrophotometry
作者：
李跃彬 汤臣倍健股份有限公司
中文关键词:干法灰化,湿式消解,回收率,原子吸收分光光度法,
英文关键词:dry ashing,wet digestion,recovery,atomic absorption spectrophotometry,
发表日期：2015-06-09
- 文件大小:
- 195.77 KB
- 下载次数:
- 60
-
高速下载
|
|
