摘要：
研究了在OP微乳液的作用下,用一阶导数磷钼蓝分光光度法直接测定水中可溶性磷酸盐的最佳条件。OP微乳液大大改变了磷钼蓝的最大吸收波长,并提高了测定的稳定性和灵敏度。本法可有效地消除硅、砷和悬浮物等的干扰,其服从比耳定律的线性范围为0～1.92mg/L,检出限为0.007mg/L,加标回收率在98%～101%之间,测定准确、快速。
关键词:
可溶性磷酸盐,
磷钼蓝,
OP微乳液,
一阶导数分光光度法,
直接测定
Abstract:
A new method for the determination of soluble phosphate in water by micro emulsion and the first order derivative spectrophotometry is proposed. The λ max of phosphomolybdenum blue is changed because of OP micro emulsion,and the solubility and sensitivity are increased.The interference such as the suspension,micro amount of Si and As etc. can be effectively eliminated.A linear calibration curve is obtained in 0～1.92 mg/L with a detective limit of 0.007 mg/L and the recovery rate of 98%～101%. The method is very simple and accurate in comparison with the conventional spectrophotometry.
Key words:
soluble phosphate,
phosphomolybdenum blue,
OP micro emulsion,
first order derivative spectrophotometry,
direct determination
中图分类号:
盖仕辉, 王林. 微乳液增溶导数分光光度法直接测定水中可溶性磷酸盐[J]. 工业水处理, 2003, 23(1): 65-66.
Ge Shihui, Wang Lin. Direct determination of soluble phosphate in water by micro emulsion and first order derivative spectrophotometry[J]. INDUSTRIAL WATER TREATMENT, 2003, 23(1): 65-66.