A new spectrophotometric method has been applied to the determination of zinc in bottled mineral water (with and without gas), refreshments, vinegar, and table salt. The method introduces the I-[di-(2-pyridyl)methylidene]-5-(salicylidene)-thiocarbohydrazone (DPST) as chromogenic reagent. This proced
A new method for allantoin determination and its application in allantoin determination in Agrostemma githago L. seed
✍ Scribed by Miladin M. Vrbaški; Bojana Grujić-Injac; Danica Gajić
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- English
- Weight
- 248 KB
- Volume
- 91
- Category
- Article
- ISSN
- 0003-2697
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✦ Synopsis
We have established several optimal conditions for qualitative and quantitative allantoin determination by applying Ehrlich's reagent. The limit of detection for allantoin determination amounts to 5 x 10(-6) mM. Allantoin is determined quantitatively by measuring the absorbance at 440 nm (from 300 to 1000 micrograms/ml). The color of the complex becomes stable by standing for 10 min at room temperature. We have used these conditions for allantoin determination in Agrostemma githago seed.
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