In:
Pest Management Science, Wiley, Vol. 57, No. 5 ( 2001-05), p. 427-431
Abstract:
To investigate the hepatic metabolism of the new insecticide flupyrazofos [ O,O ‐diethyl O ‐(1‐phenyl‐3‐trifluoromethylpyrazol‐5‐yl) phosphorothioate], isolated rat liver was perfused with flupyrazofos under single‐pass conditions. In outflow perfusate and bile, 1‐phenyl‐3‐trifluoromethyl‐5‐hydroxypyrazole (PTMHP), PTMHP–sulfate and PTMHP–glucuronide conjugates were identified as the metabolites of flupyrazofos. However, O,O ‐diethyl O ‐(1‐phenyl‐3‐trifluoromethylpyrazol‐5‐yl) phosphate (flupyrazofos oxon) was not detected. A HPLC method with UV detection was used to investigate the hepatic disposition of flupyrazofos and its metabolite PTMHP. The concentrations of flupyrazofos, PTMHP and PTMHP conjugates in outflow perfusate reached steady‐state levels within 20 min after commencing perfusion of 7.3 µ M flupyrazofos. At steady state, the mean extraction ratio of flupyrazofos was 0.93 (±0.01) and clearance was 26.1 (±0.2) ml min −1 which nearly approached perfusate flow rate (28 ml min −1 ). PTMHP accounted for 55.7 (±5.8)% of eliminated flupyrazofos and was recovered as unchanged PTMHP, PTMHP–sulfate and PTMHP–glucuronide in the bile as well as the outflow perfusate. © 2001 Society of Chemical Industry
Type of Medium:
Online Resource
ISSN:
1526-498X
,
1526-4998
Language:
English
Publisher:
Wiley
Publication Date:
2001
detail.hit.zdb_id:
2003455-6
SSG:
12
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