1997
DOI: 10.1016/s0731-7085(97)00092-7
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Potentiometric determination of ascorbic acid in pharmaceutical preparations using a copper based mercury film electrode

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Cited by 7 publications
(8 citation statements)
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“…The linearity range is 10 −5 -10 −1 M, with LOD = 2 μM. This method can be used whenever visual titrimetric methods are out of the question due to colored or opaque pharmaceutical solutions 98 .…”
Section: Spcementioning
confidence: 97%
“…The linearity range is 10 −5 -10 −1 M, with LOD = 2 μM. This method can be used whenever visual titrimetric methods are out of the question due to colored or opaque pharmaceutical solutions 98 .…”
Section: Spcementioning
confidence: 97%
“…The mercury electrode was prepared according to literature (Riyazuddin and Nazer, 1997), with some adaptations. We used a copper rod of 2 mm diameter and 5 cm length.…”
Section: Instrumentation and Protocolsmentioning
confidence: 99%
“…Fabrication of CBMFE CBMFE was prepared as reported in our earlier publications. [24][25][26] A plastic sleeved copper wire (99% purity) of 10 cm length and 1 mm thickness was taken and plastic sleeve was removed at both ends to expose about 1 cm copper wire. Epoxy seal was applied at the junction of copper wire and plastic sleeve to impede entry of solution in to the sleeve.…”
Section: Instrumentationmentioning
confidence: 99%
“…11 Many potentiometric methods have also been reported for the assay of INH by making use of commercially available ion selective electrodes [19][20][21][22][23] which are either costly or not readily available in the market. Since copper based mercury film electrode (CBMFE) is cost effective, it has been applied as an indicator electrode for the assay of INH, 24 ascorbic acid, [25][26] sulphamethoxazole. 27 The present work deals with the potentiometric back titration of INH in the presence of RIF and vitamin B 6 in tablets and syrups.The interferences of RIF and vitamin B 6 are not significant in the proposed method.…”
Section: Introductionmentioning
confidence: 99%