Fluorescence quenching method for the determination of sodium dodecyl sulphate with near-infrared hydrophobic dye in the presence of Triton X-100.
A fluorophotometric method for the determination of anionic surfactant sodium dodecyl sulphate (SDS) was proposed. The method is based on the quenching effect of SDS on the fluorescence of near-infrared (NIR) hydrophobic dye, 2-[4'chloro-7'(3''hexadecyl-2''benzothiazolinylidene)-3',5'-(1''',3'''-propanediyl)-1',3',5'-heptatriene-1'-yl]-3-ethylbenzothiazolium iodide (dye I) in the presence of Triton X-100. The calibration graph is linear in the concentration range from 0 to 2 x 10(-6) mol L(-1) of SDS with a detection limit (LOD) of 8.3 x 10(-8) mol L(-1). The relative standard deviation for the determination of 7 x 10(-7) mol L(-1) SDS was 4.1%. Recoveries of 95.3-110.3% were found for the addition to 1.0 x 10(-6) mol L(-1) SDS in the analysis of environmental water samples. Preliminary research shows that the fluorescence quenching is due to the formation of dye aggregate facilitated by SDS.
Zhu
Changqing
C
The Key Laboratory of Analytical Science of MOE, Department of Chemistry, Xiamen University, 361005, China.
Zheng
Hong
H
Li
Donghui
D
Li
Shunhua
S
Xu
Jingou
J
D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D057927:Hydrophobic and Hydrophilic Interactions; D007259:Infrared Rays; D007477:Ions / Q000737:chemistry; D015394:Molecular Structure; D017830:Octoxynol / Q000737:chemistry*; D012967:Sodium Dodecyl Sulfate / Q000032:analysis* / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry
D005456:Fluorescent Dyes; D007477:Ions; D014867:Water; D012967:Sodium Dodecyl Sulfate; D017830:Octoxynol