Indirect Determination of Ascorbic Acid by Atomic Absorption Spectroscopy

Authors

  • Maryam Iranpour Department of Science and Research Branch, Islamic Azad University, Fars, Iran
  • Masoomeh Emadi Young Researchers and Elite Club, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran
  • Mohammad AliZare Zare 1Young Researchers and Elite Club, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran
  • Omran Moradlou 2Department of Chemistry, College of Sciences, Alzahra University, Tehran, Iran
Abstract:

A new and simple method followed by atomic absorption spectrometry has been developedfor indirect determination of ascorbic acid (AA). The proposed method was based on the oxidationof AA to dehydroascorbic acid with Cu2+cation(200mgL-1)in an ammonium thiocyanatesolution atpH2.4. AA reduces Cu2+to Cu+followed by the precipitation of Cu+ with SCN-. Then, the excess ofCu2+in the solution was measured by the atomic absorption spectrometry.The results showed thatAA can be sensitively measured in the linear range of 2.0 to 40.0 mgL-1 with the detection limit of1.5mgL-1.The relative standard deviation (%RSD) was 0.319 in 7 determination of 2.0 mgL-1 AA.Finally, the method was successfully used for the determination of AA in tablets containing variousamounts of AA.

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Journal title

volume 4  issue 1

pages  86- 92

publication date 2016-12-01

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