摘要
A novel method of flow injection chemiluminescence (CL) analysis for the determination of rare earth La(Ⅲ) ion is prensented. It is based on the quenching effect of La(Ⅲ) ion in the CL system of Luminol H 2O 2 Cr(Ⅲ). The CL emission intensity is linear with La(Ⅲ) concentration in the range 1×10 -7 ～1×10 -4 mol/L; the detection limit is 4×10 -8 mol/L, the relative standard deviation is less than 3% (for 2×10 -7 mol/L La, n =11).
A novel method of flow injection chemiluminescence (CL) analysis for the determination of rare earth La(Ⅲ) ion is prensented. It is based on the quenching effect of La(Ⅲ) ion in the CL system of Luminol H 2O 2 Cr(Ⅲ). The CL emission intensity is linear with La(Ⅲ) concentration in the range 1×10 -7 ～1×10 -4 mol/L; the detection limit is 4×10 -8 mol/L, the relative standard deviation is less than 3% (for 2×10 -7 mol/L La, n =11).
