电感耦合等离子体发射光谱法测定广西八角中7种金属元素

Determination of 7 Metal Elements in Guangxi Star Anise Samples by Inductively Coupled Plasma Optical Emission Spectrometry

目的:分析八角中金属元素钙、镁、铜、铁、锌、钾、锰含量。方法:以硝酸-过氧化氢混合体系,微波消解法处理样品,应用电感耦合等离子体发射光谱仪(ICP-OES)对样品进行测定。结果:测定的20批次八角中钙、镁、铜、铁、锌、钾、锰含量的均值分别为102,109,8.93,86.4,8.89,879,187mg/kg。该方法的回收率为90.2%~105.5%,相对标准偏差为1.92%~3.37%,检出限范围为0.006~0.013mg/L。结论:方法具有准确、快速、检出限低、灵敏度高等优点。

Objective：To analyze the content of metal elements（calcium,magnesium,cuprum,iron,zinc,potassium and manganese）in star anise samples. Methods：The determination method of calcium,magnesium,cuprum,iron,zinc,potassium and manganese in star anise samples by inductively coupled plasma optical emission spectrometry with microwave digestion is developed.Results：The mean value of calcium,magnesium,cuprum,iron,zinc,potassium and manganese in 20 batches of star anise samples is 102,109,8.93,86.4,8.89,879,187 mg/kg respectively.The recoveries of the above mentioned elements range from 90.2%to 105.5%,while the RSDs vary between 1.92% and 3.37%,the detection limits range from 0.006 mg/L to 0.013 mg/L.Conclusion：This method is accurate,rapid and has the advantages of low detection limit and high sensitivity.