氢化物发生-原子荧光法测定煤中硒的试验研究

Evaluation of method for determination of selenium in coal by hydride generation-atomic fluorescence spectrometry

基于煤中硒含量的准确测定可为避免燃煤硒中毒提供有效依据,介绍了应用氢化物发生-原子荧光法测定煤中硒的试验方法,探讨了还原剂及载液浓度等测定煤中硒的试验条件选择,并对10个煤中硒含量测定进行了精密度和正确度试验与评估。结果表明:应用氢化物发生-原子荧光法可准确测定煤中硒的含量,精密度和正确度试验结果与现行国家标准测定结果无显著性差异,即氢化物发生-原子荧光法测定煤中硒的精密度和正确度均良好。氢化物发生-原子荧光光谱法测定煤中硒含量具有自动化程度高、操作快速方便、灵敏度高等特点,适合批量样品的测定。

Because that selenium content accurate determination in coal could provide effective basis for avoiding coal-fired selenium poisoning,the test method for determination of selenium in coal by hydride generation-atomic fluorescence spectrometry was introduced.The selection of reductant and carrier concentration was discussed and the precision and accuracy test and evaluation were carried out for 10 coal samples.The results show that the content of selenium in coal can be determined accurately by hydride generation-atomic fluorescence spectrometry,there is no significant difference between the precision and accuracy test results and the results of current national standards.That is to say,the precision and accuracy of the determination of selenium in coal by hydride generation atomic fluorescence spectrometry are good.Hydride generation-atomic fluorescence spectrometry has advantages such as high automatic degree,quick and easy operation,and high sensitivity,it is suitable for batch samples.