A differential pulse polarographic method is described for the determination of three pharmacologically active 5-hydroxynaphthoquinones in Drosera-containing phytomedicines available on the Austrian market. The polarographic behaviours of plumbagin, 7-methyljuglone and droserone were examined in var
Direct determination of zinc in insulin preparations by differential pulse polarography
✍ Scribed by L.L. Lewin; P.Sanz Pedrero; M.R. Vilariño
- Publisher
- Elsevier Science
- Year
- 1986
- Tongue
- English
- Weight
- 382 KB
- Volume
- 4
- Category
- Article
- ISSN
- 0731-7085
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✦ Synopsis
A rapid and direct differential pulse polarographic method for the determination of zine in insulin preparations is described. Optimum conditions were studied using 0.2 M acetate buffer (pH 4.1) as the supporting electrolyte. Agreement between the results by direct analysis and those by the procedure involving pressurized digestion was satisfactory.
📜 SIMILAR VOLUMES
A differential pulse polarographic assay was developed for determining flucytosine in tablets. The drug is extracted from the sample with water and hydrochloric acid and, after the pH is adjusted, an aliquot is added to the cell and the solution is polarographed at the dropping mercury electrode ver