A Highly Selective Complexometric Determination of Mercury(II) using L-Tyrosine as a Masking agent
Publish place: Advanced Journal of Chemistry-Section A، Vol: 3، Issue: 3
Publish Year: 1399
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_AJCS-3-3_006
تاریخ نمایه سازی: 28 فروردین 1399
Abstract:
Determination of mercury in the existence of various other metal ions, a transparent speedy and accurate complexometric method is described, depending on the selective masking ability of L-Tyrosine towards Hg (II). Along with other associated metal ions, Hg (II) present in a given sample solution is first complexed with an surplus of EDTA and the leftover EDTA is titrated with Zinc sulfate solution in the presence of xylenol orange as an indicator at pH 5.0-6.0.A known excess of 0.02M L-Tyrosine solution is then added to discharge the EDTA from Hg (II)-EDTA complex and then it is mixed well. The displaced EDTA is again titrated with a Zinc sulfate solution. The method goes well in the range 4-80 mg of mercury (II) with the relative error ±0.4 and standard deviation ≤0.05 mg. The issue of the existence of various metal ions on the exactitude of the results has been studied. And the method can be applied for the determination of Mercury in alloys, in its synthetic mixtures of ions and its complexes.
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Authors
Ashwini Prasad
Department of Chemistry, St. Aloysius College, Mangalore-۵۷۵۰۰۳, Karnataka, India
Gopalakrishna Bhat Nellikaya
Department of Chemistry, Srinivas Institute of Technology (Visvesvaraya Technological University), Valachil, Mangalore-۵۷۴۱۴۳, Karnataka, India
Ronald Aquin Nazareth
Department of Chemistry, St. Aloysius College, Mangalore-۵۷۵۰۰۳, Karnataka, India
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