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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/715

Title: Trace determination of zinc in standard alloys,environmental and pharmaceutical samples by fourth derivative spectrophotometry using 1-2-(thiazolylazo)-2-naphthol as reagent and ammonium tetraphenylborate supported on naphthalene as adsorbent
Authors: Bhalotra, Anju
Puri, Bal Krishan
Keywords: Zinc
1-2(Thiazolylazo)-2-naphthol
Ammonium tetraphenylborate-naphthalene
Fourth derivative spectrophotometry
Standard alloys
Environmental and pharmaceutical samples
Issue Date: 1999
Citation: Talanta, 49(3), 485–493
Abstract: A highly sensitive, selective, economical and rapid method for the trace determination of zinc using fourth derivative spectrophotometry has been proposed with 1-2-(thiazolylazo)-2-naphthol (TAN) as an analytical reagent and ammonium tetraphenylborate (ATPB)-naphthalene as an adsorbent. Zn–TAN is quantitatively retained on ATPB naphthalene in the pH range 6.5–9.5. The calibration plot is linear in the concentration range 0.02–1.4 mg ml-1 Zn of DMF solution. The sensitivity of the method as determined from the slope of the calibration plot is 2.640 (dA:dl):(mg ml-1). Nine replicate determinations of 5.0 mg of zinc in 5 ml of DMF give a mean signal height of 2.660 (peak to peak height between =597 nm and +585 nm) with a relative standard deviation of 1.1%. The various conditions have been optimized and the developed method has been used for the determination of zinc in standard alloys, environmental and pharmaceutical samples.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/715
Appears in Collections:Chemistry

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