罗丹明B-双氧水流动注射化学发光体系测定水中微量Cr(Ⅲ)

Determination of trace Cr(Ⅲ) in water by RDB-H_2O_2 flow injection-chemiluminescence system

基于在碱性介质中，Cr^3＋-罗丹明B—H2O2的化学发光。建立了流动注射化学发光测定废水中微量Cr^3＋的方法。该法的线性范围为2．5×10^-4-1．0×10^-2g·mL^-1，方法的检出限为5×10^-5g·mL^-1。11次平行测定Cr^3＋的相对标准偏差为2．2％。

Based on the Cr^3＋ - RDB- H2O2 - OH- chemiluminescence system, a method for determination of trace Cr^3＋ in water was developed.Under optimal conditions,the linear range for determination of Cr^3＋ was 2.5×10^-4-1.0×10^-2g·mL^-1, The detection limit was 5×10^-5g·mL^-1, The relative standard deviations for 1.0×10^-3g·mL^-1 Cr^3＋ （n = 11） was 2.2%.