Fate of parathion in artificially fortified grape juice processed into wine
Titel:
Fate of parathion in artificially fortified grape juice processed into wine
Auteur:
Kawar, Nasri S. Gunther, Francis A. Iwata, Yutaka
Verschenen in:
Journal of environmental science and health. Part B, Pesticides, food contaminants, and agricultural wastes
Paginering:
Jaargang 13 (1978) nr. 1 pagina's 1-9
Jaar:
1978
Inhoud:
“Semellon”; grape juice fortified with a high level of 25 ppm parathion was fermented using Saccharomyces cerevisiae var. ellipsoideus. After 12 days the parathion levels in the wine and lees were 10.3 and 156 ppm, respectively; the paraoxon, amino-parathion, and p-nitrophenol levels in the wine were 0.16, 0.20, and 4.5 ppm, respectively, and in the lees were 0.04, 3.1, and 10 ppm, respectively. Thus, hydrolysis of parathion to p-nitrophenol and parathion sorption to sedimented particulate matter were important pathways for parathion residue reduction in the wine. The 56-day-old finished wine just prior to bottling contained 8.8 ppm parathion, 0.04 ppm paraoxon, 0.21 ppm aminoparathion, and 3.0 ppm p-nitrophenol. Two months storage at 24°, 12°, 4°, and -20°C had no effect on paraoxon and aminoparathion residue levels in the wine; parathion residues in wine decreased at all storage temperatures.