期刊论文

Zeng Qingru

中文

分析化学

0253-3820

2006

34

5

642-646

10.3321/j.issn:0253-3820.2006.05.012

本文系湖南省科技计划基金资助项目（No.04SK3019）

本校为第一且通讯机构

介绍了几种聚氧乙烯型非离子表面活性剂的KI-I2分光光度法测定,讨论不同实验条件对测定的影响.结果表明,以碘-碘化钾溶液为显色剂的KI-I2分光光度法测定波长为500 nm, 显色时间为120 min, Brij35, Brij 30, Triton X-100和Tween-80工作曲线相关系数在0.9971～0.9995之间;检测范围分别为 0.2～25 mol/L、0.4～25 mol/L、1.5～50 mol/L和0.5～50 mg/L;操作简单,酸稳定性好,大部分盐类、非离子和阴阳表面活性剂、土壤腐植酸、土壤浸提液对测定的干扰小;易水解的Al^3＋和Fe^3＋对测定有较大的干扰,但加酸后即可消除.方法直接用于测定聚氧乙烯型非离子表面活性剂在土壤上的吸附等温线获得了满意的效果...

The method KI-I-2 spectrophotometry used in determing polyoxyethylene nonionic sfrfactants had been studied. In addition, the effect of different experiment conditions on the determination of nonionic sfrfactants was discussed. The results show that the wave length for determination of nonionic surfactant 500 nm and the reactive time with KI-I-2 developer was 120 min respectively, The work curves of Brij35, Brij30, Triton X-100 and Tween-80 were highly linear (correlation coefficient was 0.9971 -0.9995) and their linear ranges were 0.2 - 25 mg/L, 0.4 - 25 mg/L, 1.5 - 50 mg/L, respectively. Fur...