Influence of temperature, pressure, modifier, and collection mode on supercritical CO2 extraction efficiencies of Diuron from sugar cane and orange samples
✍ Scribed by Fernando M. Lanças; Sandra R. Rissato
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 93 KB
- Volume
- 10
- Category
- Article
- ISSN
- 1040-7685
No coin nor oath required. For personal study only.
✦ Synopsis
The effects of temperature, pressure, modifier, and collection mode in Ž . Ž Ž the supercritical fluid extraction SFE of the herbicide Diuron 3-3,4-dichloro-. . phenyl -1,1-dimethylurea in real sugar cane and orange samples were evaluated. The extraction efficiencies were directly compared to those achieved using Ž . solid᎐liquid extraction SLE described in the literature with identical clean-up and analysis by high resolution gas chromatography᎐electron capture detection Ž . HRGCrECD . The SFE recoveries at temperatures lower than 80ЊC and pressure lower than 150 atm were typically lower than that obtained by SLE; however, an increase in the temperature and pressure increased the efficiencies of SFE over SLE. The results showed that under certain conditions CO in the supercritical 2 Ž state presented higher extraction power than SLE extracted ca. 10% more . pesticide , showing it to be a suitable method for pesticide residue analysis. ᮊ 1998