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本文研究了在0.5—0.65N硫酸介质中,以氟化钾为掩蔽剂,抗坏血酸～盐酸羟胺为还原剂,用锑盐在室温催化磷显色,使磷锑钼三元配合物与阳离子表面活性剂形成多元离子缔合物,该离子缔合物在正丁醇—醋酸丁酯混合有机溶剂中经萃取后产生“析相”,此兰色胶团,经增溶后,其灵敏度大大提高,表观摩尔吸收系数为2.55×10~5l·mol·cm~(-1)。配合物组成比为P:Sb:Mo:CTMAB=1:2:12:2。稳定时间达1O小时以上。应用在天然水、地下水及一些废水中微量磷的测定中结果满意。
In the 0.5-0.65 N sulfuric acid medium, potassium fluoride was used as masking agent, ascorbic acid and hydroxylamine hydrochloride as reductants, antimony salt was used to catalyze phosphoric acid color reaction at room temperature, the phosphorus antimony molybdenum ternary complex was reacted with cationic surface active Agent to form a multi-ion complex, the ion-association in n-butanol-butyl acetate mixed organic solvent extraction to produce a “phase”, the blue micelles, solubilized, the sensitivity greatly increased, Apparent molar absorption coefficient of 2.55 × 10 ~ 5l · mol · cm ~ (-1). The complex composition ratio is P: Sb: Mo: CTMAB = 1: 2: 12: 2. Stable time of more than 1O hours. Application in the determination of trace phosphorus in natural water, groundwater and some wastewater satisfaction results.