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CATALYTIC KINETIC PHOTOMETRIC DETERMINATION OF TRACE AMOUNTS OF NITRITE

Jinlong Yan

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Abstract

Based on the catalytic effect of trace amounts of nitrite on the oxidation de-coloration reaction between potassium bromate and PAN in dilute phosphoric acid medium,a new method for the determination of trace amounts of nitrite was established.The linear rang for nitrite is 0.2-8.0 μg/25 mL,and the detection limit is 5.7 μg·L~-1.The proposed method has been applied to the determination of traces of nitrite in water and fruit samples giving RSD′s less than 2.5%,and recoveries in the range of 101%-104%.

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What this paper is about

Based on the catalytic effect of trace amounts of nitrite on the oxidation de-coloration reaction between potassium bromate and PAN in dilute phosphoric acid medium,a new method for the determination of trace amounts of nitrite was established.The linear rang for nitrite is 0.2-8.0 μg/25 mL,and the detection limit is 5.7 μg·L~-1.The proposed method has been applied to the determination of traces of nitrite in water and fruit samples giving RSD′s less than 2.5%,and recoveries in the range of 101%-104%.

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Available abstract

Based on the catalytic effect of trace amounts of nitrite on the oxidation de-coloration reaction between potassium bromate and PAN in dilute phosphoric acid medium,a new method for the determination of trace amounts of nitrite was established.The linear rang for nitrite is 0.2-8.0 μg/25 mL,and the detection limit is 5.7 μg·L~-1.The proposed method has been applied to the determination of traces of nitrite in water and fruit samples giving RSD′s less than 2.5%,and recoveries in the range of 101%-104%.

Key concepts: Nitrite, Potassium bromate, Chemistry, Trace Amounts, Detection limit, Phosphoric acid, Catalysis, Inorganic chemistry

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