Hexadecylpyridinium chloride micelles for the kinetic determination of sulphur-containing compounds by their induction of the iodine-azide reaction

Lunar, María Loreto; Rubio, Soledad; Pérez‐Bendito, Dolores

doi:10.1016/0003-2670(94)80165-7

Cited by 9 publications

(3 citation statements)

References 14 publications

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“…The mechanism of the iodineazide reaction was discussed elsewhere. [12,13] Iodine consumption in the iodine-azide reaction is measured by volumetric titration [14] as well as spectrophotometric [15,16] measurements. The change in its quantity after the iodine-azide reaction is proportional to the amount of a sulfur(II) compound in a sample.…”

Section: Introductionmentioning

confidence: 99%

Thin Layer Chromatography with Post-Chromatographic Iodine-Azide Reaction for Thiuram Analysis in Food Samples

Zakrzewski

Ciesielski

2008

Journal of Liquid Chromatography & Related Technologies

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A simple, sensitive, precise, and rapid planar chromatographic method for thiuram analysis was elaborated. Reaction between iodine and azide ions induced by thiuram was applied as a detection system. The developed plates were sprayed with freshly prepared mixtures of sodium azide and starch solution adjusted to pH 6.0, and exposed to iodine vapor. The spots became visible as white spots on a violet-grey background. The iodine-azide detection system was proved to be the most favorable and enabled detection of quantities at the level 0.5 pmol per spot. The iodine-azide test was compared with other visualizing techniques commonly used in planar chromatography: iodine vapor, UV 254 , Cu(II). Certain factors that influence detection with iodine-azide reaction as a detection system were checked. The developed method was linear over the concentration range of 2-9 pmol per spot. The proposed technique was applied to detect thiuram in food samples.

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Section: Introductionmentioning

confidence: 99%

Thin Layer Chromatography with Post-Chromatographic Iodine-Azide Reaction for Thiuram Analysis in Food Samples

Zakrzewski

Ciesielski

2008

Journal of Liquid Chromatography & Related Technologies

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“…(34). The aim of the present work was to establish a simple kinetic spectrophotometric method for determination of biotin in certain pharmaceutical dosage forms, based on the catalytic effect of biotin on the tri-iodide-azide reaction which has been widely applied to the determination of compounds viz, captopril and ethamsylate (35), carbocisteine, ethionamide, thioctic acid and penicillamine (36) and glutathione and tetramethylthiuram disulphide (37).…”

Section: Introductionmentioning

confidence: 99%

Kinetic Spectrophotometric Determination of Biotin in Pharmaceutical Preparations

Salim,

Walash,

Rizk

et al. 2008

Int. J Biomed Sci.

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A simple accurate kinetic spectrophotometric method was developed for the determination of biotin in pure form and pharmaceutical preparations. The proposed method is based on a catalytic acceleration of biotin on the reaction between sodium azide and tri-iodide in an aqueous solution. Concentration range of 4-16 µg/mL for biotin was determined by measuring the decrease in the absorbance of tri-iodide at 348 nm by a fixed time method. The decrease in absorbance after 14 min from the initiation of the reaction was markedly correlated to the concentration with correlation coefficient of 0.9999. The detection limit (LOD) of biotin was 0.18 µg/mL while quantitation limit (LOQ) was 0.54 µg/mL. The percentage recovery of the spiked samples was 100.08 ± 0.761. The proposed procedure was successfully applied for the determination of biotin in its pharmaceutical preparations with mean recoveries of 101.17 ± 2.05 and 97.87 ± 1.50 for biotin ampoules and capsules, respectively. The results obtained were in good agreement with those obtained using official method.

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“…The aim of the present work was to establish a simple kinetic spectrophotometric method for determination of biotin in certain pharmaceutical dosage forms, based on the catalytic effect of biotin on the tri-iodide-azide reaction which has been widely applied to the determination of compounds viz, captopril and ethamsylate ( 35 ), carbocisteine, ethionamide, thioctic acid and penicillamine ( 36 ) and glutathione and tetramethylthiuram disulphide ( 37 ).…”

Section: Introductionmentioning

confidence: 99%

Kinetic Spectrophotometric Determination of Famotidine in Pharmaceutical Preparations

Walash

Sharaf-El-Din

Metwally

et al. 2005

Jnl Chinese Chemical Soc

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A simple accurate kinetic spectrophotometric method was developed for the determination of biotin in pure form and pharmaceutical preparations. The proposed method is based on a catalytic acceleration of biotin on the reaction between sodium azide and tri-iodide in an aqueous solution. Concentration range of 4-16 μg/mL for biotin was determined by measuring the decrease in the absorbance of tri-iodide at 348 nm by a fixed time method. The decrease in absorbance after 14 min from the initiation of the reaction was markedly correlated to the concentration with correlation coefficient of 0.9999. The detection limit (LOD) of biotin was 0.18 μg/mL while quantitation limit (LOQ) was 0.54 μg/mL. The percentage recovery of the spiked samples was 100.08 ± 0.761. The proposed procedure was successfully applied for the determination of biotin in its pharmaceutical preparations with mean recoveries of 101.17 ± 2.05 and 97.87 ± 1.50 for biotin ampoules and capsules, respectively. The results obtained were in good agreement with those obtained using official method.

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Hexadecylpyridinium chloride micelles for the kinetic determination of sulphur-containing compounds by their induction of the iodine-azide reaction

Cited by 9 publications

References 14 publications

Thin Layer Chromatography with Post-Chromatographic Iodine-Azide Reaction for Thiuram Analysis in Food Samples

Thin Layer Chromatography with Post-Chromatographic Iodine-Azide Reaction for Thiuram Analysis in Food Samples

Kinetic Spectrophotometric Determination of Biotin in Pharmaceutical Preparations

Kinetic Spectrophotometric Determination of Famotidine in Pharmaceutical Preparations

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