用于流动注射分析中用孔雀石绿萃取分光光度法测定阴离子表面活性剂的新型相分离器。

New phase separator for extraction-spectrophotometric determination of anionic surfactants with Malachite Green by flow injection analysis.

作者信息

Sakai T, Harada H, Liu X, Ura N, Takeyoshi K, Sugimoto K

机构信息

Department of Applied Chemistry, Aichi Institute of Technology, Yachigusa, Yakusa-cho, Toyota 470-03, Japan.

出版信息

Talanta. 1998 Jan;45(3):543-8. doi: 10.1016/s0039-9140(97)00096-9.

DOI:10.1016/s0039-9140(97)00096-9

PMID:18967035

Abstract

A simple flow injection spectrophotometric method for the determination of anionic surfactants in river water was studied. A three-channel flow system was assembled. The distilled water as a carrier and 5x10(-5) mol l(-1) Malachite Green (MG) dissolved in 0.1 mol l(-1) CH(3)COONa-CH(3)COOH buffer solution (pH 5) were delivered at 1.94 ml min(-1). The mixed solvent (toluene+methylisobutyl ketone (MIBK)=1+1) was pumped at 0.78 ml min(-1). Other conditions were the extraction coil 0.5 mm i.d.x3 m, the reaction temperature 20 degrees C and the sample size 200 mul. The calibration graph was linear in the range 0.1-0.4 ppm at 626 nm. The detection limit (S/N=3) was 18 ppb and a sample frequency of 20 h(-1) was attained. The relative standard deviation (n=7) for 0.4 ppm standard sodium dodecylsulfate (SDS) solutions was 1.1%. And also, new phase separator with a convenient connector was designed. This Fl method was applied to the determination of anionic surfactants in river water.

摘要

研究了一种用于测定河水中阴离子表面活性剂的简单流动注射分光光度法。组装了一个三通道流动系统。以蒸馏水为载流，将溶解于0.1 mol l(-1) CH(3)COONa-CH(3)COOH缓冲溶液（pH 5）中的5×10(-5) mol l(-1)孔雀石绿（MG）以1.94 ml min(-1)的流速输送。混合溶剂（甲苯+甲基异丁基酮（MIBK）=1+1）以0.78 ml min(-1)的流速泵送。其他条件为：萃取盘管内径0.5 mm×3 m，反应温度20℃，进样量200 μl。校准曲线在626 nm处0.1 - 0.4 ppm范围内呈线性。检测限（S/N = 3）为18 ppb，进样频率达到20 h(-1)。0.4 ppm标准十二烷基硫酸钠（SDS）溶液的相对标准偏差（n = 7）为1.1%。此外，还设计了带有方便接头的新型相分离器。该流动注射法应用于河水中阴离子表面活性剂的测定。