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STUDY OF THE CATALYTIC-KINETIC PHOTOMETRIC DETERMINATION OF TRACE AMOUNTS OF MANGANESE

Pei Lu

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Abstract

In an acetate buffer of pH 4.5 and in the presence of nitrilotriacetic acid, strong catalytic action of trace amounts of manganese(Ⅱ) on the oxidation decoloration reaction of methylene blue by potassium periodate is observed. Optimum condition of this decoloration reaction is studied and based on these facts a satisfactory method for the determination of trace amounts of manganese in pure magnesium metal is proposed. The RSD′s of this method is found to be ≤10% and the recoveries are found in the range of 93%～107%.

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In an acetate buffer of pH 4.5 and in the presence of nitrilotriacetic acid, strong catalytic action of trace amounts of manganese(Ⅱ) on the oxidation decoloration reaction of methylene blue by potassium periodate is observed. Optimum condition of this decoloration reaction is studied and based on these facts a satisfactory method for the determination of trace amounts of manganese in pure magnesium metal is proposed. The RSD′s of this method is found to be ≤10% and the recoveries are found in the range of 93%～107%.

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Available abstract

In an acetate buffer of pH 4.5 and in the presence of nitrilotriacetic acid, strong catalytic action of trace amounts of manganese(Ⅱ) on the oxidation decoloration reaction of methylene blue by potassium periodate is observed. Optimum condition of this decoloration reaction is studied and based on these facts a satisfactory method for the determination of trace amounts of manganese in pure magnesium metal is proposed. The RSD′s of this method is found to be ≤10% and the recoveries are found in the range of 93%～107%.

Key concepts: Potassium periodate, Nitrilotriacetic acid, Manganese, Chemistry, Catalysis, Inorganic chemistry, Magnesium, Methylene blue

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