抄録
Ion flotation followed by a spectrophotometric determination of sulfide ion in water is reported. It is based on the formation of methylene blue from sulfide ion through the reaction with N, N-dimethyl-p-phenylenediamine in the presence of ferric ion, and on the flotation of methylene blue by using an anionic surfactant, sodium lauryl sulfate. Influences of various experimental parameters on the formation and the flotation of methylene blue were examined. Under the optimum conditions established, down to 2 μg of sulfide ion in 1000 ml of sample could be determined. Calibration curve obtained was linear in the range of 2-40 μg 1-1.
