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本文采用磷钨酸比色法测定显影液中微量的米吐尔和对苯二酚,试验了用加热分解法和氯化汞掩蔽法消除亚硫酸钠的干扰,确定了分析条件,并考查了分析的准确度,该方法适用于经活性炭净化后排放的黑白显影废水的水质检查。
In this paper, the determination of trace amounts of Metol and hydroquinone in the developing solution was determined by phosphotungstic acid colorimetric method. The interference of sodium sulfite was eliminated by pyrolysis method and mercuric chloride masking method. The analytical conditions were determined and analyzed Accuracy, this method is suitable for water quality inspection of black and white developing wastewater discharged after activated carbon purification.