微波消解处理-三重四级杆电感耦合等离子体质谱测定土壤样品中硒量
Determination of Selenium in Soil Samples by Microwave Digestion and Triple Quadruple Inductively Coupled Plasma Mass Spectrometry
邓碧霞1
作者信息
- 1. 中国冶金地质总局昆明地质勘查院,云南昆明 650203
- 折叠
摘要
土壤样品中Se含量测试时,微波消解可以充分消解样品且试剂使用量较少,测试结果同参考值相吻合,测试相对误差RE在-3.2%～-4.0%之间,RSD在2.3%～4.6%之间.三重四级杆电感耦合等离子体质谱测试土壤样品中Se时,其本身抗干扰能力较强,采用He气作为碰撞气体,采用碰撞模式时测试效果更好,测试精密度RSD在0.8%～4.6%之间,相对误差RE在-1.3%～3.8%之间.使用氧气作为碰撞气体,可以使溶液中Se离子碰撞结合成质量更大的测试目标物Se.O(98),从而进一步排除干扰,测试结果同参考值更加吻合.经实际样品测试验证,采用微波消解进行前处理,电感耦合等离子体质谱仪在氧气碰撞模式下测试土壤样品中的硒测试精密度RSD在0.8%～4.9%之间,加标回收率在96.7%～102.8%之间,方法稳定可靠.
Abstract
When testing the Se content in soil samples,microwave digestion can fully digest the sample and use less reagents.The test results are consistent with the reference values,with a relative error of RE between-3.2%and-4.0%,and an RSD between 2.3%and 4.6%.When measuring Se in soil samples by triple quadrupole inductively coupled plasma mass spectrometry,it has strong anti-interference ability.When using He gas as the collision gas,the test effect is better when using the collision mode.The test precision RSD is between 0.8%and 4.6%,and the relative error RE is between-1.3%and 3.8%.By using oxygen as a collision gas,Se ions in the solution can collide and combine to form a larger mass of the test target Se.O(98),thereby further eliminating interference.The test results are more consistent with the reference values.The actual sample test verified that the microwave digestion was used for pretreatment.The precision RSD of the inductively coupled plasma mass spectrometer in the oxygen collision mode was 0.8%and 4.9%,and the spiked recovery rate was 96.7%and 102.8%.The method was stable and reliable.
关键词
微波消解/三重四级杆/电感耦合等离子体质谱/土壤样品/硒量Key words
microwave digestion/triple quadrupole/inductively coupled plasma mass spectrometry/soil sample/selenium content引用本文复制引用
出版年
2024
NETL
NSTL
万方数据