Indirect spectrophotometric determination of sulphide with the ternary complex system Ag(I)-phen-BPR.
Trace amounts of sulphide can be determined from its effect on the ternary complex system of Ag(+), Bromopyrogallol Red (BPR), and 1,10-phenanthroline (phen). Sulphide in the range 5-120 ng/ml causes a decrease in absorption, that is a linear function of the concentration. Common metal ions such as Na(+), K(+), Ca(2+), Mg(2+), Al(3+), Mn(2+) and anions such as F(-), Cl(-), NO(-)(3), SO(2-)(4), CO(2-)(3), and PO(3-)(4) at the 4 mug/ml level or more do not interfere, but I(-) or CN(-) must be absent.
Fu-Sheng
W
W
Department of Chemistry, China University of Science and Technology, Hefei, Anhui, China.
Yu-Rei
Z
Z
Fang
Y
Y
Nai-Kui
S
S