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本文介绍一种简便,快速测定水和废水中硫化物方法,其原理是根据水中硫化物被ZnS固定后,在pH 5.2的EDTA溶液中,可与1.2-萘醌磺酸盐,生成蓝色荧光物质的反应。荧光强度在激发波235nm、发射波470nm下,与硫化物含量呈线性关系。仪器Perkin-Elmer LS-5型荧光分光光度计,附带恒温器和1.00cm比色池。 Beckman 70型pH计。蒸馏装置在250ml蒸馏瓶上装有一滴液漏斗和一通氮管,用100ml容量瓶作接收瓶。
This article describes a simple and rapid method for the determination of sulfide in water and wastewater. The principle is based on the sulfide in the water by ZnS fixed in EDTA solution pH 5.2, with 1.2-naphthoquinone sulfonate to generate blue fluorescence Material reaction. Fluorescence intensity in the excitation wave 235nm, emission wave 470nm, and the sulfide content showed a linear relationship. Instrument Perkin-Elmer LS-5 fluorescence spectrophotometer with thermostat and 1.00 cm cuvette. Beckman 70 pH meter. Distillation Unit A 250 ml distillation flask was equipped with a dropping funnel and a nitrogen tube. A 100 ml volumetric flask was used as the receiving flask.