Journals / Turkish Journal of Chemistry / 2013 / Cilt: 37 - Sayı: 6
Determination of Pb(II) in natural water with dibromo-p-methyl-sulfonazo by the light-absorption ratio variation approach
- Journal
- Turkish Journal of Chemistry
- Pages
- 987–992
- DOI
- —
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.
Özet
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.