- Turkish Journal of Chemistry
- Vol: 37 Issue: 6
- Determination of Pb(II) in natural water with dibromo-p-methyl-sulfonazo by the light-absorption rat...
Determination of Pb(II) in natural water with dibromo-p-methyl-sulfonazo by the light-absorption ratio variation approach
Authors : Jie Zhang
Pages : 987-992
Doi:10.3906/kim-1210-58
View : 13 | Download : 5
Publication Date : 9999-12-31
Article Type : Makaleler
Abstract :Pb ions can react sensitively with dibromo-p-methylsulfonazo (DMSA) to form a blue complex, whose absorption is maximal at 630 nm. By means of the light-absorption ratio variation approach (LARVA), the direct determination of Pb was developed in 0.3 M nitric acid and plots of D Ar-1 vs. cPb-1 are linear where D Ar is the light-absorption ratio variation and cPb Pb(II) concentration is between 0 and 5.0 mg/L. The limit of detection (3s) of Pb(II) is only 0.02 mg/L. This method was applied to direct analysis of natural water with satisfactory results.Keywords : Light-absorption ratio variation, spectrophotometry, dibromo-p-methylsulfonazo, determination of Pb(II), natural water