能量色散X射线荧光法快速测定生物质燃料中的磷含量

应用能量色散X射线荧光光谱法建立了生物质燃料中磷含量的快速测定方法。对比分析压片压力条件、基体效应和干扰元素,明确了能量色散X射线荧光光谱法的测试条件,通过加标回收率实验、标准样品测试、ICP-OES方法对比等获得实验结果。实验结果表明:能量色散X射线荧光光谱法用于生物质燃料样品的分析,标准工作曲线线性相关系数为0.998 3,方法检出限为0.4 mg/kg,平均加标回收率为98.1%,测定值的相对标准偏差为1.36%~4.92%,标准样品磷含量在标准值不确定度内,能量色散X射线荧光光谱法与行业标准ICP-OES方法的准确度和精密度不存在显著性差异,可应用于生物质中磷含量的环境监测。

Study on Rapid Determination of Phosphorus Content in Biomass Fuel by Energy Dispersive X-ray Fluorescence Method for Environmental Monitoring

A rapid method for the determination of phosphorus in biomass fuel is established by energy dispersive X-ray fluorescence.The tablet pressure conditions,matrix effect and the selection of interference elements are compared and analyzed,the test conditions of energy dispersive X-ray fluorescence method are defined.Through the comparative test of spiked recovery test,standard sample and ICP-OES Method,the test results show that the Linear Coefficient of the standard working curve is 0.998 3,the detection limit is 0.4 mg/kg,and the average recovery is 98.1%,the Relative Standard Deviation of the measured value is 1.36%-4.92%.The phosphorus content of the standard sample is within the uncertainty of the standard value,there is no significant difference in the accuracy and precision of the ICP-OES method,and it can be applied to the determination of phosphorus in biomass environmental monitoring.