摘要
以0．16moL／LHNO3为底液．预镀汞膜的玻碳电极为工作电极，用微分电位溶出法对固体食品中的铅进行测定，用标准加入法定量。检出限2．5×10－9，变异系数0．7％～5．7％，回收率93％～106％，本法与原子吸收法对比，测定结果无显著性差异．
Using a mercury film-plated grassy carbon electrode as working electrode and 0. 16mol/L HNO3 as base solution, lead in solid food was determined by differential potentiometric stripping method and quantitatively analysed by standard addition method. The detection limit of the method is 2. 5 × 10-9. CV is 0. 7% ～5. 7%. The recovery is 93% ～ 106%. There is no significant difference between this method and AAS.
出处
《广东微量元素科学》
CAS
1997年第5期69-72,共4页
Trace Elements Science
