Determination of Selenium in Soil Samples by Microwave Digestion and Triple Quadruple Inductively Coupled Plasma Mass Spectrometry
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.
microwave digestiontriple quadrupoleinductively coupled plasma mass spectrometrysoil sampleselenium content
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