Kinetic determination of zineb in agricultural samples by continuous addition of reagent
β Scribed by M.C. Quintero; M. Silva; D. Perez-Bendito
- Book ID
- 118995781
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 503 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0039-9140
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An automatic kinetic method for the determination of micro amounts of vitamin B12 in pharmaceutical samples based on the fast formation of a coloured complex between the cobalt contained by this vitamin and PAR [4-(2-pyridilazo)resorcinol] in a weakly alkaline medium and on the use of the continuous
## Abstract 1. A modified Nessler reagent in which the ratio HgI~2~ : KI : NaOH is 1 : 2.2 : 20 is described. It is clear and ready for immediate use and is less susceptible to interference by various cations. Distillation with phosphoric acid was satisfactory for preparing ammoniaβfree water. The