TY - JOUR T1 - Dissipation and residues of nicosulfuron in corn and soil under field conditions. AU - Wu,Qiong, AU - Chen,Xiaoxu, AU - Xu,Yanjun, AU - Han,Lijun, Y1 - 2010/05/30/ PY - 2010/02/01/received PY - 2010/05/19/accepted PY - 2010/6/1/entrez PY - 2010/6/1/pubmed PY - 2010/10/19/medline SP - 79 EP - 82 JF - Bulletin of environmental contamination and toxicology JO - Bull Environ Contam Toxicol VL - 85 IS - 1 N2 - A simple, sensitive method for the analysis of nicosulfuron in corn and soil was developed. Samples were extracted with acetonitrile: water (2:3, V/V) mixture and partitioned with dichloromethane. After concentration, the soil sample extracts were detected using high performance liquid chromatography-ultraviolet detector (HPLC-UVD), and the corn sample extracts were detected using high performance liquid chromatography-mass spectrometry detector (HPLC-MSD). The fortified recoveries at 0.05-1.0 mg/kg were 79.7%-115.8%, with the relative standard deviation of 1.40%-13.8%. The limit of detection of the analytical method was 0.05 ng at a signal-to-noise ratio of 3, and the limit of quantification was 0.05 mg/kg for both corn and soil. The dissipation dynamics of nicosulfuron in the field trials in Beijing and Changchun were investigated. The half-lives of nicosulfuron in corn plants were 0.73 days in Beijing and 0.53 days in Changchun, both with a dissipation rate of 90% over 7 days after application. The half-lives in soil were 13.64 days both in Beijing and in Changchun with a dissipation rate of 90% over 21 days. Low residues and short half-life in corn suggested that nicosulfuron could be safely used in corn crops with the suitable dosage and application. SN - 1432-0800 UR - https://www.unboundmedicine.com/medline/citation/20512311/Dissipation_and_residues_of_nicosulfuron_in_corn_and_soil_under_field_conditions_ DB - PRIME DP - Unbound Medicine ER -