Determination of chlorion in selenium and selenium-tellurium alloy with ion selective electrode

Micro chlorion in selenium and selenium-tellurium alloy has been determined by standard addition method with a chlorion selective electrode. The interference of selenium and tellurium in a large quantity can be eliminated by fluorion complexing. The proposed method is simple and fast, with a relative standard deviation less than 8% and standard addi- tion recoveries of 96%~104%. This method can determine chlorion in a quantity as low as 0. 001 %.