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
The spectrophotometric determination of iron(III) in a flow-injection system with a mixed solvent
β Scribed by T.J. Cardwell; D. Caridi; R.W. Cattrall; I.C. Hamilton
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 289 KB
- Volume
- 192
- Category
- Article
- ISSN
- 0003-2670
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β¦ Synopsis
A fast and sensitive flow-injection procedure is described for the determination of iron(II1). The complexing agent is ammonium diisopropyldithiophosphate in a 1:l (v/v) isopropanol/water carrier stream. The linear range is 0.05-l 5 mg 1-l iron(II1) with a detection limit of 0.01 mg 1-l and the injection rate is about 400 h-' .
π SIMILAR VOLUMES
The change in peak current resulting from the reaction of Fe(I1) with nitroso-R salt in a flow-injection system is used to quantify Fe(I1) with either single-or dual-electrode amperometric detectors. The current change varies linearly with Fe(I1) concentration from 0 to 200 mg 1-l. The relative stan
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