微波消解-原子荧光光谱法测定沙棘产品中的铅、砷、汞  

Determination of Pb、As and Hg in sea- buckthorn products by microwave digestion- AFS

作　　者：师存杰[1] 汪正花 段金凤 

机构地区：[1]青海大学化工学院,青海西宁810016 [2]青海黄河水电有限公司新能源分公司,青海西宁810008 [3]青海碱业有限公司,青海海西817000

出　　处：《青海大学学报（自然科学版）》2014年第4期22-26,共5页Journal of Qinghai University(Natural Science)

摘　　要：为建立沙棘PV粉、沙棘油中铅、砷、汞的原子荧光光谱检测方法,通过试验确定了样品前处理方法,对负高压、灯电流、载气、屏蔽气、原子化气高度、酸度等测试条件进行了优化。在优化的工作条件下,用原子荧光光谱法测定其中的铅、砷、汞的含量。结果表明：对所测元素铅、砷、汞,校准曲线的相关系数分别为：0.999 7、1.000 0、0.999 9;检出限分别为：0.000 1、0.000 2、0.000 02 mg/kg;相对标准偏差为1.2%～4.83%;用加标回收率评价方法的准确性,回收率为92%～105%。该方法快速、简便、准确且灵敏度高,为沙棘产品中重金属含量测定提供了较好的方法。To develop an atomic fluorescence spectrometric method for the determination of Pb, As, Hg in sea - buckthorn - PV - powder and sea - buckthorn - oil. Sample pretreatement method, nega- tive high pressure, burner current, carrier gas, shieding gas, atomizer height acidity and so on were optimized. On optimal conditions, Samples were digested Pb, As, Hg,were directly analyzed by atomic fluorescence relative coefficient of the calibration curves were 0. 999 7 with microwave digestion system, and the spectrometric （AFS）. Pb, As, Hg, the cor- 1. 000 0 and 0. 999 9 respectively. Detec- tion limit were 0. 000 1,0. 000 2,0. 0000 2 mg/kg respectively. The RSDs were between 1.20% ～ 4. 83% and the recoveries were between 92% ～ 105%. The method is convenient, quick -acquired accurate and highly sensitive. The method has been applied to the determination of trace heavy metal in sea- buckthorn products with satisfactory results.

关 键 词：微波消解 原子荧光 沙棘 铅 砷 汞 

分 类 号：O657.34[理学—分析化学]