Square-wave and differential pulse voltammetric methods are proposed for the determination of the herbicides paraquat and diquat, based on their oxidation peak at the glassy carbon electrode, following their degradation in strong alkaline medium. The potential values are near 0.31 V for paraquat and
Square wave voltammetric determination of paraquat and diquat in aqueous solution
โ Scribed by A. Walcarius; L. Lamberts
- Publisher
- Elsevier
- Year
- 1996
- Tongue
- English
- Weight
- 965 KB
- Volume
- 406
- Category
- Article
- ISSN
- 1572-6657
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
## Abstract The voltammetric behavior of paraquat was investigated at hydroxyapatiteโmodified carbon paste electrode HAPโCPE in K~2~SO~4~. A method was developed for the detection of the trace of this herbicide, based on their redox reaction. The reduction peaks of paraquat were observed around โ0.
Adsorption of diquat and paraquat cationic pesticides from aqueous solution studied on three different activated carbons varying in N\*-BET surface area from 660 m'/g to 1280 m\*/g suggests that the rate limiting step for removal of these pesticides in agitated non-flow systems is one of intrapartic
The behavior of ยฏuvoxamine (FVX) was studied by square-wave techniques, leading to two methods for its determination in aqueous samples (pH 2.0 and 4.7) and pharmaceuticals formulations. The application of the square-wave mode shows the determination of FVX between 2610 78 and 3610 76 mol L 71 . FVX
Xenon compounds in aqueous solution at the glassy carbon electrode are irreversibly reduced to xenon(O). The observed reduction potentials us see for xenon compounds are: (I) Perxenate -0.49 to -0.67 V with increasing pH from lO\_ 14; (2) Xenon trioxide -0.54 to -0.48 V with increasing pH from 7-13.