摘要
用气相色谱法检测氰戊菊酯在番茄上的残留,一般可检出的最小检出量为1.17×10^(-11)克。在夏季,番茄生长期喷施20％氰戊菊酯乳油30—40毫克/亩,用药3次,收获间隔期8天,在番茄全果中的残留量低于0.2毫克/公斤(允许残留量)。
A gas-liquid chromatographic method is described for residues analysis of a synthetic pyrethroid, fenvalerate on tomatoes. The plant material is extracted with petraleum ether-acet-one and subsequenthy cleand up on Florisil with benzene-ethyl acetate eluting solvent. Gasliquid chromatographic analysis was performed on a 0.8×3 mm glass Column containing 3% ov-101 on 80-100 mesh gas-chrom Q, with triliom electron capture detection. The minmum dertectable concentration is about 1.17×10^(-11)gram.It was sprayed during the growing stage of the tomato plant In summer, At maturity, 3applications(at 3 day interal)of Fenvalerate 20EC 30-40ml/mou, the-residue on the tomato fruit was found to be below 0.2ppm.
出处
《农业环境保护》
CSCD
1989年第5期4-6,25,共4页
Agro-Environmental Protection
