Spectrophotometric determination of zinc in pharmaceutical multimineral preparations by azo-dye derivatives of benzimidazole and 1,2,4-triazole

Zareba, S.

doi:10.1016/0031-6865(95)00009-x

Cited by 7 publications

(3 citation statements)

References 8 publications

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“…Finally Zn 2+ has chemical stability and it undergoes the complexation with selected sensitive chromophoric chelator 19 . Among the many reagents reported so far with heterocyclic rings [20][21][22][23][24] the present heterocyclic pyramidine (Scheme 1) has been shown to serve as an excellent chromophor for the quantification of zinc ions in aqueous solution. The complexation is found to be quantitative in sodium acetate and acetic acid buffer in the presence of pyridinum chloride [pyridine+2 M HCl] as salting out agent.…”

Section: Research Articlementioning

confidence: 99%

Direct and Derivative Spectrophotometric Determination of Zn(II) in Pharmaceuticals

Vani¹,

Subudhi²,

Shivaramaiah³

et al. 2013

Chem Sci Trans

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Heterocyclic compound diamino and dihydroxy-pyramidine was synthesized and proposed as chelating agent for the determination of trace amounts of zinc. Zinc(II) forms the ripen-mangocolour complex with DADHP (Diamino dihydroxypyrimidine) in 1:3 stoichiometric ratio at pH-6 in acetic acid and sodium acetate buffer in the presence of pyrideniumchloride as salting out agent. The maximum absorbance is observed at 480 nm. The Beer's law is obeyed in the range of 1-6 µg. The molar absorptivity (ε) and Sandell's sensitivity of the complex is 0.1484 x 10 4 L mol-1 cm-1 and 0.04545 µg cm-1 respectively. The method was successfully applied for the quantification of Zn(II) in pharmaceutical multi vitamin preparations in the presence of other trace elements. The statistical data evaluated reveals the sensitivity and accuracy of the method than the other methods reported.

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Section: Research Articlementioning

confidence: 99%

Direct and Derivative Spectrophotometric Determination of Zn(II) in Pharmaceuticals

Vani¹,

Subudhi²,

Shivaramaiah³

et al. 2013

Chem Sci Trans

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show abstract

“…Several spectrophotometric procedures reported in the literature for the determination of Zn(II) are summarized by Bhalotra et al [4] and a previous solvent extraction step is required in other spectrophotometric methods [5][6][7][8][9]. Electroanalytical methods such as potentiometry [10][11][12], potenciometric stripping analysis [13,14] and anodic redissolution stripping voltammetry also were described [15].…”

Section: Introductionmentioning

confidence: 99%

Spectrophotometric flow injection system for determination of Zn2+ in ophthalmic formulations using Alizarin red S

Fatibello‐Filho

Vieira

2009

Eclet. Quím.

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A spectrophotometric flow injection method for the determination of Zn(II) in ophthalmic formulations was developed. In this work, Zn(II) ion was complexed with Alizarin red S in borate buffer solution (pH 9.0) and the chromophore produced was monitored at 520 nm. The analytical curve was linear in the Zn(II) concentration range from 6.05 x 10 -6 to 1.50 x 10 -4 mol L -1 with a detection limit of 3.60 x 10 -6 mol L -1 . Recoveries ranged from 96.3 to 105 % and a relative standard deviation of 1.2 % (n = 10) for 5.5x10 -5 mol L -1 Zn(II) reference solution were obtained. The sampling rate was 60 h -1 and the results obtained of Zn(II) in ophthalmic products using this procedure are in close agreement with those obtained using a comparative spectrophotometric procedure at 95 % confidence level.

show abstract

Section: Introductionmentioning

confidence: 99%

Spectrophotometric flow injection system for determination of Zn2+ in ophthalmic formulations using Alizarin red S

Fatibello‐Filho

Vieira

2009

Eclet. Quim.

View full text Add to dashboard Cite

A spectrophotometric flow injection method for the determination of Zn(II) in ophthalmic formulations was developed. In this work, Zn(II) ion was complexed with Alizarin red S in borate buffer solution (pH 9.0) and the chromophore produced was monitored at 520 nm. The analytical curve was linear in the Zn(II) concentration range from 6.05 x 10-6 to 1.50 x 10-4 mol L-1 with a detection limit of 3.60 x 10-6 mol L-1. Recoveries ranged from 96.3 to 105 % and a relative standard deviation of 1.2 % (n = 10) for 5.5x10-5 mol L-1 Zn(II) reference solution were obtained. The sampling rate was 60 h-1 and the results obtained of Zn(II) in ophthalmic products using this procedure are in close agreement with those obtained using a comparative spectrophotometric procedure at 95 % confidence level.

show abstract

Spectrophotometric determination of zinc in pharmaceutical multimineral preparations by azo-dye derivatives of benzimidazole and 1,2,4-triazole

Cited by 7 publications

References 8 publications

Direct and Derivative Spectrophotometric Determination of Zn(II) in Pharmaceuticals

Direct and Derivative Spectrophotometric Determination of Zn(II) in Pharmaceuticals

Spectrophotometric flow injection system for determination of Zn2+ in ophthalmic formulations using Alizarin red S

Spectrophotometric flow injection system for determination of Zn2+ in ophthalmic formulations using Alizarin red S

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