We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
The Chiral Separation and.
- Authors
Qi, Yanli; Liu, Donghui; Sun, Mingjing; Di, Shanshan; Wang, Peng; Zhou, Zhiqiang
- Abstract
ABSTRACT The chiral pesticide enantiomers often have different and environmental behaviors, which suggests that the risk assessments should be on an enantiomeric level. In this work, the chiral separation of the napropamide enantiomers and the degradation in tomato, cucumber, rape, cabbage, and soil were investigated. Napropamide enantiomers could be separated absolutely by high-performance (HPLC) using a Chiralpak IC column with a resolution factor of 11.75 under the optimized condition. Solid phase extraction (SPE) was used for cleanup of the enantiomers in the vegetable samples. The residue analysis method was validated. Good linearities (R2 = 0.9997) and recoveries (71.43% -97.64%) were obtained. The (LOD) were 0.05 mg/kg in soil and 0.20 mg/kg in vegetables. The results of degradation showed that napropamide dissipated rapidly in vegetables with half-lives of only 1.13-2.21 days, but much more slowly in soil, with a half-life of 11.95 d. Slight degradation of the two enantiomers was only observed in cabbage, with enantiomeric fraction (EF) = 0.46, and there was no in the other vegetables. The degradation of napropamide in the five matrixes was fast, and there was no . Chirality 28:108-113, 2014. © 2014 Wiley Periodicals, Inc.
- Subjects
RESOLUTION (Chemistry); SEPARATION of enantiomers; PESTICIDE analysis; HIGH performance liquid chromatography; SOLID phase extraction; NAPROPAMIDE
- Publication
Chirality, 2014, Vol 26, Issue 2, p108
- ISSN
0899-0042
- Publication type
Article
- DOI
10.1002/chir.22277