CUN Li-hui,LI Bi-ying,YIN Yu-zhong,et al.Optimization of Analysis Condition for Monitoring Thallium in Water by Graphite Furnace Atomic Absorption Spectrometry[J].China Water & Wastewater,2021,37(24 24):124-129.
Optimization of Analysis Condition for Monitoring Thallium in Water by Graphite Furnace Atomic Absorption Spectrometry
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
24 24
Page:
124-129
Column:
Date of publication:
2021-12-17
- Abstract:
- Thallium in water was determined by graphite furnace atomic absorption spectrometry. Influence of lamp current, ashing temperature and atomization temperature on absorbance was discussed. Effects of adding palladium nitrate-magnesium nitrate matrix modifier on ashing temperature, atomization temperature and absorbance were explored, and the optimum instrument conditions for determining thallium by graphite furnace atomic absorption spectrometry were optimized. The enrichment method of Varian AA240Z-GTA120 multiple injection was explored because the analytical method could not meet the standard in direct determination. The method shortened the pretreatment time of a single sample from 24 h to 10 min and simplified the pretreatment process. The detection limit was 0.04 μg/L after 5 times concentration. The linear correlation coefficient was greater than 0.999, the relative standard deviation was between 0.1%-8.5%, and the standard recovery rate was 87.0%-112.0%. Therefore, the method has good precision and accuracy, and the detection limit meets the standard requirements, which can be applied to detect ultra-trace thallium in drinking water and surface water.
Last Update:
2021-12-17