Abstract This article studied the sensitizing effects of surfactants in the experiment of spectrophotometric determination of trace iron, described the results of different surfactants combined with the analysis of visible absorption spectroscopy, kinetic research, acid and alkali environment adaptability. The research showed that sensitizing effects of the cationics was obvious, mixed use of trimethyl ammonium bromide and fourteen alkyl pyridine bromide had the best sensitizing effects. The absorbance could be increased nearly 84%, the molar absorption coefficient ε was 4.4×104, and the linear relationship was quite good while the concentration range of iron was 0.1～1.5 μg/mL, which conformed the Lambert Beer's law and was suitable to measure trace iron in the water.
DAI Xing-De, ZHANG Ai-Jv, ZHANG Xiao-Lin. Sensitizing Effects of Surfactants in Spectrophotometric Determination of Trace Iron[J]. , 2015, 36(20): 30-32.
