Vanadium (O-l mg 1-l) is determined in solutions by a catalytic procedure with conductometric detection. Reaction times of the bromate/iodide/ascorbic acid Landolt reaction are evaluated from conductance vs. time traces, obtained with an instrument with compensation facilities. Results are evaluated
Catalytic determination of molybdenum with improved sensitivity by means of the hydrogen peroxide/iodide/ascorbic acid landolt reaction
โ Scribed by J.A. Amberson; G. Svehla
- Publisher
- Elsevier Science
- Year
- 1985
- Tongue
- English
- Weight
- 481 KB
- Volume
- 178
- Category
- Article
- ISSN
- 0003-2670
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โฆ Synopsis
Modified catalytic procedures are described for the determination of O-O.1 and O-l mg 1-l molybdenum in solutions. Reaction times of the hydrogen peroxide/iodide/ ascorbic acid Landolt reaction are evaluated from conductometric or potentiometric traces. Calibration graphs are based on the ratio of the reaction times for the blank and the sample, t(O)/t(c), plotted against the concentration of molybdenum. The shapes of the conductometric and potentiometric traces are explained.
๐ SIMILAR VOLUMES
Chlorpromazine is oxidized catalytically in the presence of iodide with 1 M hydrogen peroxide in 1 M sulphuric acid medium to form a red radical, which is further oxidized to a colourless sulphoxide. The plot of absorbance at 528 nm vs. reaction time shows an absorbance maximum proportional to the c
## Ah&act The lodme quenciung effect on the fluorescence of the bmaphthyl-based ampluphde CsBNC,N, was applied to the momtormg of a Landolt-type reaction between hydrogen peroxide, potassium iodide and ascorbtc aad The veszular system presented takes advantage of both the extremely high sensltmty