The indirect spectrophotometric determination of 0.8-7.2 ppm calcium in the presence of magnesium, phosphate and sulphate by flow injection analysis (f.i.a.) is described. The method is based on the exchange reaction between the calcium and the zinc complex of ethylene glycol-bis(2aminoethylether)te
A flow injection system with ion-exchange for spectrophotometric determination of copper in rocks
β Scribed by Eluzir Moraes Pedrazzi; Ricardo Erthal Santelli
- Book ID
- 118996325
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 494 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0039-9140
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A spectrophotometric flow-injection method based on a diazo-coupling reaction is proposed for the simultaneous determination of nitrite and nitrate. Nitrate is reduced to nitrite by using a reductor column which is formed by filling part of the sample loop with copperized cadmium. The flow system pr