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New Findings on Sulfur Amino Acids from Assam University Summarized

February 18, 2014



By a News Reporter-Staff News Editor at Life Science Weekly -- New research on Sulfur Amino Acids is the subject of a report. According to news reporting originating from Silchar, India, by NewsRx correspondents, research stated, "The electrocatalytic oxidation of ascorbic acid in phosphate buffer solution (pH 7.0) by immobilized silver nanoparticles (Ag@CTAB) on L-cysteine modified gold electrode is reported. The modified electrode has been characterized electrochemically using redox couple [Fe(CN)(6)](3-/4-)."

Our news editors obtained a quote from the research from Assam University, "The electrocatalytic activity of the prepared electrodes is studied using cyclic voltammetry and electrochemical impedance spectroscopy. Electrochemical measurements show that the modified electrode (Au/L-cysteine/AgNPs) is highly active towards ascorbic acid oxidation. The oxidation peak of ascorbic acid at the Au/L-cysteine/AgNPs electrode is highly stable upon repeated potential cycling. The oxidation current of ascorbic acid increases upon each increment (0.05-0.35 mu m) in differential pulse voltammetry experiments. The oxidation current shows a linear relationship with the concentration of ascorbic acid with a correlation coefficient of 0.996. The detection limit of ascorbic acid was found to be 2x10(-12) M. Common physiological interferents such as glucose, tartaric acid, citric acid and cysteine do not show any interference within the detection limit of ascorbic acid."

According to the news editors, the research concluded: "The silver nanoparticles modified gold electrode has been used to determine the amount of ascorbic acid present in fruit and vegetable juices.."

For more information on this research see: Electrocatalytic oxidation of ascorbic acid by immobilized silver nanoparticles on self-assembled L-cysteine monolayer modified gold electrode. Indian Journal of Chemistry Section A-Inorganic Bio-Inorganic Physical Theoretical & Analytical Chemistry, 2014;53(1):57-61. Indian Journal of Chemistry Section A-Inorganic Bio-Inorganic Physical Theoretical & Analytical Chemistry can be contacted at: Natl Inst Science Communication-Niscair, Dr K S Krishnan Marg, Pusa Campus, New Delhi 110 012, India (see also Sulfur Amino Acids).

The news editors report that additional information may be obtained by contacting K. Barman, Assam Univ, Dept. of Chem, Silchar 788011, Assam, India.

Keywords for this news article include: Asia, India, Silchar, Cysteine, Chemistry, Nanoparticle, Nanotechnology, Electrochemical, Sulfur Amino Acids, Neutral Amino Acids, Sulfhydryl Compounds, Emerging Technologies

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Source: Life Science Weekly


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