抄録
Bleaching agents (perborates, percarbonates, and hypochlorites) in detergents were determined automatically by the use of Auto-Analyzer.
The proposed method is based on the reaction of 4-amino-antipyrine with phenol in the presence of oxidizing agents. The enzyme, a horseradish peroxidase, was used as a catalyst for the determination of oxygen releasing compounds (perborates and percarbonates). In the case of hypochlorites, the enzyme is unnecessary. A sample solution was introduced automatically into the stream of the reductants solution and then the absorbance of the formed indophenolic dye was monitored at 505 nm.
In this method, a large amount of EDTA did not interfere the determination and the resulting calibration curves were completely linear. Sodium perborate or sodium percarbonate in a standard detergent was determined by this method. The results were satisfactory. The sampling rate was 5070 samples/h.
