【讨论】ICP-MS应用之半定量分析方法

1做一些
2元素不一样，30％左右

7500ce仪器说明书上是30%...
半定量分析前,应对半定量响应曲线进行校正

半定量分析前用调谐液对低中高三个质量数元素进行校准
仪器说明书上以及培训老师也是说有30%的误差

如果校准好，在中重质量范围的半定量结果可以到误差小于20%

半定量曲线比较重要
一般仪器中会对每个元素提供一个RSF（相对灵敏度因数）
如果生成半定量曲线的元素比较理想，这种半定量误差还是很低的

半定量也得看基体，比较干净的水也许可以达到30%左右，基体稍微复杂点差的就远了

Semiquantitative analysis is a very powerful feature of ICP-MS, since it provides reasonable accuracy (±10 - 30%) without the need to run external standards. It scans through all masses (or selected masses) and reports concentrations for all elements,based on a stored elemental response database. It is especially useful for screening
unknown samples, or for evaluating new matrices sample types. It is also useful for determining the concentrations of calibration standards to be prepared for quantitative analysis.

Yes,it means without the need to run external standards.

有干扰的根本就别想了