能量色散-X射线荧光光谱测定中草药痕量镉、铅、铜

为寻求一种能够直接对中草药中重金属进行快速检测的方法，采用压片法对样品进行前处理，建立了能量色散-X射线荧光光谱法快速检测中草药中痕量重金属镉、铅、铜元素的方法。在20 min即可完成检测，镉、铅、铜检出限分别为0.072、0.207、0.340 mg/kg，测试结果表明与原子吸收和ICP-MS相比，本方法数据稳定性和准确度良好，具有快速、准确、简单的优点，能够满足药典中对重金属元素的限量要求，适用于现场快速检测与质量控制检测。

Determination of trace cadmium, lead, and copper in Chinese herbal medicine by X-ray fluorescence spectrometry

In order to find a method that can directly detect the heavy metals in Chinese herbal medicines, the method by energy dispersive X-ray fluorescence spectrometry was established for the rapid determination of trace heavy metals such as cadmium, lead and copper in Chinese herbal medicines, and in this method the sample was pretreated by tablet pressing. The detection can be completed within 20 minutes, and the detection limits of cadmium, lead and copper are 0.072, 0.207 and 0.340 mg/kg respectively, compared with atomic absorption and ICP-MS, the data stability and accuracy are good, this method has the advantages of fast, accurate and simple, can meet the limit requirements of heavy metal elements in the pharmacopoeia, and is suitable for on-site rapid detection and quality control.