title: Dissipation of fuphenthiourea residues in rice and field ecosystem after seed soaking application.
abstract: An analytical method with SPE or matrix solid-phase dispersion clean-up procedure on PSA followed by HPLC-DAD was established for determination of fuphenthiourea residues in rice, water and soil. At three concentration levels (0.05, 0.5 and 5 mg kg(-1)), recoveries were in the range of 61.2-82.7%, with a RSD less than 13%. The LOQ of this method was 0.005, 0.02 and 0.01 mg kg(-1) for the water, soil and rice samples, respectively. Fuphenthiourea was applied in supervised ﬁeld trials at GAP conditions during rice seeding. It was found that under field conditions, the dissipation half-lives of fuphenthiourea were 0.8 d in the water and 24.8 d in the soil. At harvest, no detectable residues (<LOD) were found in the various samples.
authors.affiliation: College of Science, China Agricultural University, Beijing 100193, China.
authors.forename: Yaping
authors.initials: Y
authors.lastname: Jiang
authors.forename: Yongxiao
authors.initials: Y
authors.lastname: Bao
authors.forename: Canping
authors.initials: C
authors.lastname: Pan
mesh_terms: D016573:Agrochemicals / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism; D017753:Ecosystem; D004784:Environmental Monitoring; D005618:Fresh Water / Q000737:chemistry; D005663:Furans / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism; D012275:Oryza / Q000378:metabolism*; D010937:Plant Growth Regulators / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism; D012639:Seeds / Q000378:metabolism*; D012987:Soil / Q000737:chemistry; D052616:Solid Phase Extraction; D013890:Thiourea / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism
chemical_list: C558278:5-(2-chlorophenyl)-N-(2-(2nitrobenzoyl)hydrazinecarbonothioyl) furan-2-carboxamide; D016573:Agrochemicals; D005663:Furans; D010937:Plant Growth Regulators; D012987:Soil; D013890:Thiourea