“…Numerous analytical methods, such as titrimetric, 1,2 amperometric, 3 polarographic, 4,5 potentiometric, 6,7 catalytic, [8][9][10][11][12][13] spectrophotometric [14][15][16][17][18][19][20][21][22][23][24][25][26][27] and chromatographic [28][29][30][31][32][33][34] techniques, have been reported for the determination of sulfide in water samples. In most of these methods, the preparation of standard solutions of unstable sulfide causes difficulties.…”