RESUMO
OBJECTIVE:To establish the method for simultaneous determination of 5 heavy metals in Vespae Nidus,and to dis-cuss the effects of difterent producing area and part on the contents of heavy metals in Vespae Nidus. METHODS: The contents of arsenic(As),mercury(Hg),lead(Pb),cadmium(Cd)and copper(Cu)were determined by atomic spectrophotometry(hydride generation method,cold vapor method,graphite furnace method and flame method). The difference in the contents of heavy metals in samples were compared among different producing areas by analyzing data. RESULTS:The linear range of As,Hg,Pb,Cu, Cd were 0-40 ng/mL(r=0.9930),0-0.9 ng/mL(r=0.9974),0-80 ng/mL(r=0.9955),0-8 ng/mL(r=0.9927),0-800 ng/mL(r=0.9966),respectively. Limit of quantitation were 4.473,2.35×10 - 3 ,8.380,2.128,54 ng/mL,limit of detection were 1.342,0.701× 10 - 3,2.514,0.632,16 ng/mL. RSDs of precision,stability and reproducibility tests were all lower than 5.0%. The recoveries were 84.26% -102.25%(RSD=7.71% ,n=6),90.90% -115.31%(RSD=9.38% ,n=6),92.16% -105.70%(RSD=6.19% ,n=6), 90.81%-113.99%(RSD=8.86%,n=6),91.63%-102.79%(RSD=5.09%,n=6). The phenomenon that heavy metals of sample from Shandong and Hebei exceed the standard was the most serious. Main heavy metal which exceed the standard was Pb. The con-tent of Pb in Chamber was higher than other parts. CONCLUSIONS: The method is simple,precise,stable and reproducible,and can be used for simultaneous determination of 5 heavy metals in Vespae Nidus. There are different contents of heavy metal in Ves-pae Nidus of different producing areas and parts.