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Study on Method of Determination of Four Plant Growth Regulater Residues in Watermelons |
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DOI:10.3969/j.issn.1004-4957.年份.月份 |
KeyWord:high performance liquid chromatography(HPLC) solid phase extraction 24 dichlorophenoxyacetic acid gibberellic acid paclobutrazol 6 benzylaminopurine residues |
Author | Institution |
LU Yimin1,2,YI Guobin1 ,CHEN Chuangbin2,CAI Jinliang2,DU Binyang2,CHEN Ruzhu2 |
1.广东工业大学轻工化工学院;2.仲恺农业工程学院化学化工学院 |
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Abstract: |
A solid phase extraction/high performance liquid chromatographic method was developed for the analysis of residues of 24 dichlorophenoxyacetic acid(24 D),gibberellic acid(GA3),paclobutrazol(PP333) and 6 benzylaminopurine(6 BA) residues in watermelons. Samples were extracted with 80% methanol water solution,then concentrated and cleaned up on a Strata C18 solid phase column.The separation of target compound was carried out on a ZORBAX Eclipse XDB C18 column (46 mm×150 mm,5 μm) under gradient condition using methano-015% phosphoric acid as mobile phase.The ultraviolet detecter was used to detect analytes at 220 nm.Four plant growth regulaters were qualitatively analyzed by using retention time and UV spectra,and quantitatively determined by the external standard method.Under the optimal conditions,the calibration curves were linear between the peak areas and the concentrations in the range of 05-10 mg/L with correlation coefficients(r) more than 0999.The limits of detection were between 005 mg/kg and 015 mg/kg.The recoveries at two spiked levels of 100 mg/kg and 300 mg/kg ranged from 82% to 90% with relative standard deviations(RSDs) no more than 38%.The results indicated that this method was simple,accurate and sensitive,and was suitable for the analysis of 24 D,GA3,PP333 and 6 BA in fruits. |
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