Showing papers by "Badiadka Narayana published in 2002"
Journal Article•
TL;DR: Sandell's sensitivity and molar absorptivity of the complex are 5.6 × 10 - 3 μg cm - 2 and 3.41 × 10 4 dm 3 mol - 1 cm - 1, respectively as discussed by the authors.
4 citations
TL;DR: In this paper, a complexometric method for the determination of mercury in presence of other metal ions based on the selective masking ability of potassium bromide towards mercury is described, and accurate results are obtained for 8 mg to 250 mg of mercury with a relative error ± 0.28% and standard deviations ≤ 0.5 mg.
Abstract: A complexometric method for the determination of mercury in presence of other metal ions based on the selective masking ability of potassium bromide towards mercury is described. Mercury(II) present in a given sample solution is first complexed with a known excess of EDTA and the surplus EDTA is titrated against zinc sulfate solution at pH 5–6 using xylenol orange as the indicator. A known excess of 10% solution of potassium bromide is then added and the EDTA released from Hg-EDTA complex is titrated against standard zinc sulfate solution. Reproducible and accurate results are obtained for 8 mg to 250 mg of mercury(II) with a relative error ± 0.28% and standard deviations ≤0.5 mg. The interference of various ions is studied. This method was applied to the determination of mercury(II) in its alloys.
3 citations
Journal Article•
1 citations
TL;DR: In this paper, a complexometric method for the determination of thorium(IV) in presence of other metal ions based on the selective masking ability of sodium fluoride towards thorium is described.
Abstract: A complexometric method for the determination of thorium(IV) in presence of other metal ions based on the selective masking ability of sodium fluoride towards thorium is described. Thorium(IV) present in a given sample solution is first complexed with a known excess of EDTA and the surplus EDTA is titrated against bismuth nitrate solution at pH 2–3 using xylenol orange as indicator. A known excess of sodium fluoride (5%) is then added and the EDTA released from the Th-EDTA complex is titrated against standard bismuth nitrate solution. Reproducible and accurate results are obtained for 5 mg to 280 mg of thorium with relative errors ± 0.65% and standard deviations ≤ 0.75 mg. The interference of various ions was studied.
1 citations