Title: Determination of monosultap total residues in tomato,cucumber and soil by ultra-performance liquid chromatographytandem mass spectrometry
Abstract: An analytical method was developed for residue determination of monosultap in tomato, cucumber and soil samples by ultra-performance liquid chromatography-electrospray tandem mass spectrometry( UPLC-MS / MS). Firstly,monosultap was hydrolyzed to nereistoxin under alkaline condition. Then, after liquid-liquid partition with ether, the organic layer was evaporated and restructed in methanol. The formed nereistoxin was detected by UPLC-MS / MS,and the residue of monosultap could be calculated accordingly. Results showed good linearity ranging from 1 to 500 μg / L with correlation coefficients higher than 0. 99; the limit of detection( LOD) was 0. 213 μg / kg( tomato matrix),0. 212 μg / kg( cucumber matrix) and 0. 172 μg / kg( soil matrix), and the limit of quantification( LOQ) was 0. 710 μg / kg( tomato matrix),0. 707 μg / kg( cucumber matrix) and 0. 573 μg / kg( soil matrix). For tomato,cucumber and soil samples,average recoveriesranged from 79% to 101% at spiked level 10,100 and 500 μg / kg,and the relative standard deviations( RSD) was between 6. 6% and 16%. The developed method is suitable for determination of monosultap total residues in tomato,cucumber and soil samples.
Publication Year: 2014
Publication Date: 2014-01-01
Language: en
Type: article
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Cited By Count: 1
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