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Potentiometric Measurement of Ascorbate by Using a Solvent Polymeric Membrane Electrode

Potentiometric Measurement of Ascorbate by Using a Solvent Polymeric Membrane Electrode

Huimin Guo, Tanji Yin, Qingmei Su, Wei Qin

Talanta. 2008 May 15;75(3):851-5.

PMID: 18585157

Abstract:

A novel potentiometric method for the determination of ascorbate is described in this communication. It is based on ascorbate oxidation with permanganate which is continuously released from the inner reference solution of a ligand-free tridodecylmethylammonium chloride (TDMAC)-based polymeric membrane ion selective electrode (ISE). The ISE potential determined by the activity of permanganate ions released at the sample-membrane phase boundary is increased with the consumption of permanganate. The proposed membrane electrode is useful for continuous and reversible detection of ascorbate at concentrations in 0.1M NaCl ranging from 1.0 x 10(-6) to 1.0 x 10(-3)M with a detection limit of 2.2 x 10(-7)M.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP12125029-B	Ammonium ion solution for ISE		12125-02-9	Price

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