X射线荧光光谱法测定生物样品中氯硫氮磷钾铜锌溴
Determination of Cl, S, N, P, K, Cu, Zn and Br in Biological Samples by X-ray Fluorescence Spectrometry
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摘要: 研究了用微晶纤维素垫底镶边粉末压片制样-X射线荧光光谱测定生物样品中的Cl、S、N、P、K、Cu、Zn和Br的分析方法.重点研究了N的分析条件和校正方式,K、Cu和Zn的内标选定,测量次数对测定结果的影响.方法的检出限、精密度和准确度基本满足生物样品的分析要求.方法用于实际生物样品的测定,结果与化学法相符.Abstract: A method for the determination of Cl, S, N, P, K, Cu, Zn and Br in biological samples by XRF with pressed-powder pellet sample preparation was proposed in this paper. Measurement condition and calibration model for N, the choice of internal standard for K, Cu and Zn measurements,the effect of measurement times on signal intensities are studied in details. The precision and accuracy of the method can meet the requirements of biological sample analysis. The method has been applied to the determination of these elements in practical biological samples and the results are in agreement with those from chemical analysis method.
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Key words:
- X-ray /
- fluorescence /
- spectrometry /
- multi-element /
- analysis /
- biological /
- sample /
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