原子荧光法测定龙山卷丹百合中砷、汞含量

Content Determination of As and Hg of Lilium Lancifolium Samples from Longshan County by AFS

目的优化微波消解条件,测定龙山卷丹百合中砷、汞的含量。方法采用自动微波消解仪,在聚四氟乙烯微波管中用HNO_3-H_2O_2消解龙山卷丹百合样品,并通过原子荧光法分别测定龙山卷丹百合中砷、汞的含量。结果龙山卷丹百合是砷的含量范围为0.031~0.507 mg/kg,汞的含量最高为0.024 mg/kg,砷、汞的线性方程分别为Y=221.23X+170.72(r=0.995 9)、Y=503.52X-682.43(r=0.999 2)。生产基地的样品中砷、汞元素加样回收率分别为94.32%、92.48%,RSD分别为2.14%、2.70%;育种基地的样品中砷、汞元素加样回收率分别为94.95%、93.52%,RSD分别为1.15%、1.97%。结论该方法易操作、可靠,可用于龙山卷丹百合中砷、汞含量的测定,同时为龙山卷丹百合生产与育种基地选址提供参考。

Objective To analyze and discuss the content determination of As and Hg from Lilium Lancifolium in Longshan County; To optimize microwave digestion conditions. Methods Automatic microwave digestion appratus was used. Lilium Lancifolium samples from Longshan County were digested in teflon microwave tube with HNO3-H2O2, and As and Hg were measured with atomic fluorescence spectrometry （AFS）. Results The content of As was in the range of 0.031–0.507 mg/kg, and the highest content of Hg was 0.024 mg/kg. The regression equation was Y=221.23X＋170.72 （r=0.995 9）, Y=503.52X-682.43, （r=0.999 2）. For the production base, the recoveries of As and Hg were 94.32% and 92.48% in the samples, and RSD were 2.14% and 2.70%; for the breeding base, the recoveries of As and Hg were 94.95% and 93.52% in the samples, and RSD were 1.15% and 1.97%. Conclusion The method is simple and reliable, which can be used to the content determination of As and Hg from Lilium Lancifolium, and provide references for the choice of base of production and breeding of Lilium Lancifolium in Longshan County.