沉淀富集法测定水中铊元素的实验方法优化
Optimization of the Experimental Method for the Determination of Thallium in Water by Precipitation Enrichment Method
张康康 1张映 1谈春秀 1黄荣2
作者信息
- 1. 陕西云筑检测技术有限公司,陕西西安 710076
- 2. 国检测试控股集团陕西京诚检测有限公司,陕西西安 710000
- 折叠
摘要
文章使用过氧化氢取代溴水作为氧化剂,以特定的离心机转速通过沉淀富集法进行水样前处理,并优化了仪器分析条件,从而达到省时、提高正确度及获得较好的测量结果的目的.采用石墨炉原子吸收光谱仪对改良后的方法进行检出限、精密度、正确度和加标回收率的验证.结果表明,过氧化氢的使用以及高转速会使实验更易进行,样品回收率更高.经验证,当H2O2用量为2 mL、10 000 r/min的离心机转速及特定的仪器条件下,石墨炉原子吸收光谱仪检测水样中铊含量在检出限、精密度及正确度上均满足要求.
Abstract
In this paper,hydrogen peroxide was used to replace bromine water as oxidant,and the water sample was pre-treated by precipitation enrichment method at a specific centrifuge rotational speed,and the analytical conditions were optimized to achieve the purpose of saving time,improving accuracy and obtaining better measurement results.The detection limit,precision,accuracy and adding standard recovery of the improved method were verified by graphite furnace atomic absorption spectrometer.The results show that the use of hydrogen peroxide and high rotational speed can make the experiment easier and the sample recovery is higher.It has been proved that when the amount of H2O2 is 2 mL,10 000 r/min centrifuge rotational speed and specific instrument conditions,the determination of thallium content in water samples by graphite furnace atomic absorption spectrometer can meet the requirements in terms of detection limit,precision and accuracy.
关键词
沉淀富集法/过氧化氢/铊Key words
precipitation enrichment method/hydrogen peroxide/thallium引用本文复制引用
出版年
2024
NETL
NSTL
万方数据