Voltammetric Method for Manganese Analysis in Indian Traditional Leafy Vegetables and Medicinal Plants Collected Around
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Voltammetric Method for Manganese Analysis in Indian Traditional Leafy Vegetables and Medicinal Plants Collected Around Tirupati Town, a Famous Pilgrim Center in India: The Catalytic Hydrogen Wave (CHW) Technique S. Kanchi & K. Saraswathi & N. Venkatasubba Naidu
Received: 6 January 2011 / Accepted: 7 February 2011 / Published online: 22 February 2011 # Springer Science+Business Media, LLC 2011
Abstract Cost-effective, rapid, sensitive, and novel catalytic hydrogen wave technique (CHW) was developed for the analysis of manganese(II) in NH4Cl–NH4OH medium at pH 6.2 and produced catalytic hydrogen waves at −0.60 and −0.56 V Vs SCE with ammonium piperidine dithiocarbamate and ammonium morpholine dithiocarbamate, respectively, in various leafy vegetables and medicinal plants collected around Tirupati, Chittoor District, Andhra Pradesh which is one the famous pilgrim centers in India. Different optimal parameters like effect of pH, supporting electrolyte (NH 4 Cl– NH4OH) concentration, ligand and metal ion concentrations, and effect of adverse ions on peak height were studied to improve the sensitivity, selectivity, and detection limits CHW technique. This technique was compared in terms of Student t test and variance ratio f test with differential pulse polarography (DPP) method. The technique was applied for the analysis of manganese(II) in leafy vegetables and medicinal plants. The results obtained are in good agreement with DPP.
Poster presentation at National Seminar on Recent Advances in Chemical Research on 6–7th February 2009 at Department of Chemistry, Osmania University, Hyderabad, AP, India. S. Kanchi : K. Saraswathi : N. V. Naidu (*) Department of Chemistry, Sri Venkateswara University, Tirupati 517 502, Andhra Pradesh, India e-mail: [email protected]
Keywords D.C. polarography . Catalytic hydrogen wave (CHW) . Manganese(II) . Ammonium piperidine dithiocarbamate (Amm Pip-DTC) . Ammonium morpholine dithiocarbamate (Amm Mor-DTC) . Differential pulse polarography (DPP) . Leafy vegetables and medicinal plants
Introduction Manganese has several oxidation states. The most stable and important one is the divalent state, Mn(II), which forms a series of complexes with number of chelating agents. The principal industrial use of manganese is in the manufacture of steel and electrical accumulators. It also serves as an oxidizing agent in the chemical industry. Manganese is found in plants and animal tissues (Sanchelli 1969). It also occurs in all foods (Reilly 1980) and drinking water (Platte 1968). Manganese is required by human beings and animals. The content of manganese in drinking water has a negative correlation with the cardiac vascular diseases (Ying 1956; Chen 1958). Manganese acts as a catalyst in several enzymatic and physiological processes of living organisms. It plays an important role in the respiratory process of plants such as oxidation of carbohydrates to carbon dioxide and water. This process is catalyzed by an enzyme which is activated by manganese. According to physiologists, manganese together wit
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