title: Dissipation and residues determination of propamocarb in ginseng and soil by high-performance liquid chromatography coupled with tandem mass spectrometry.
abstract: Two-year field trials were performed at two experimental sites to investigate dissipation and terminal residues of propamocarb in ginseng root, stem, leaf, and soil by high-performance liquid chromatography coupled with tandem mass spectrometry (HPLC-MS/MS). Mean recoveries ranged from 80.5 to 95.6% with relative standard deviations (RSDs) of 5.5-9.1% at fortified levels of 0.01, 0.02, 0.05 and 0.20 mg kg(-1). The half-lives of propamocarb were 5.00-11.36 days in root, 5.07-11.46 days in stem, 6.83-11.31 days in leaf and 6.44-8.43 days in soil. The terminal residues of propamocarb were below the maximum residue limits (MRLs) of EU (0.20 mg kg(-1)) and South Korea (0.50 mg kg(-1) in fresh ginseng and 1.0 mg kg(-1) in dried ginseng) over 28 days after last spraying at recommended dosage. The results provide a quantitative basis for establishing the MRL and give a suggestion of safe and reasonable use of propamocarb in ginseng.
authors.affiliation: College of Agronomy, Jilin Agricultural University, Changchun, 130118, China.
authors.forename: Chunwei
authors.initials: C
authors.lastname: Wang
authors.forename: Yan
authors.initials: Y
authors.lastname: Wang
authors.forename: Jie
authors.initials: J
authors.lastname: Gao
authors.forename: Yuncheng
authors.initials: Y
authors.lastname: Xu
authors.forename: Lili
authors.initials: L
authors.lastname: Cui
mesh_terms: D002219:Carbamates / Q000032:analysis / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D004784:Environmental Monitoring; D006207:Half-Life; D005894:Panax / Q000737:chemistry*; D010573:Pesticide Residues / Q000032:analysis / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D056910:Republic of Korea; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis / Q000737:chemistry*; D053719:Tandem Mass Spectrometry
chemical_list: D002219:Carbamates; D010573:Pesticide Residues; D012987:Soil; D012989:Soil Pollutants; C033205:propamocarb