2009•Food ScienceRequires access
Catalytic Kinetic Spectrophotometric Determination of Ascorbic Acid
Yongnian Ni
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Abstract
A new catalytic kinetic spectrophotometric method was proposed for determining trace ascorbic acid based on the catalytic effect of ascorbic acid on the oxidation of potassium dichromate with rhodamin B in nitrate acid solution.Good linearity is obtained in the concentration range of 0.20 to 4.0 μg/ml of ascorbic acid,and the detection limit is 0.050 μg/ml.The method is used to determine trace ascorbic acid in fruits and juice with satisfactory results.