摘要
利用氨三乙酸为活化剂，锌催化过氧化氢氧化维多利亚蓝B褪色的指示反应，催化光度法测定痕量锌。方法具有一定的选择性。测量的线性范围为0．05～5．50μg·L^-1，检出限为2．6×10^-11g·mL^-1，本法可直接用于头发、茶叶、火腿、牛肉等样品中痕量锌的测定，结果令人满意。
The catalytic effect of zinc on the decolorizing reaction resulted from the oxidation of Victoria blue B with hydrogen peroxide was found. The optimum conditions influencing the rate of the reaction were obtained. A new catalytic spectrophotometric method for the determination of trace zinc was thus developed. The linear range of 0.05 ～5.50 μg·L^-1 was obtained for zinc. The detection limit is 2.6×10^-11g·mL^-1. The method was been used to determine trace zinc in samples with satisfactory results. The relative standard deviation was 1.14 % ～ 3.90 %.
出处
《广东微量元素科学》
CAS
2006年第2期49-52,共4页
Trace Elements Science
