We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
GC–ECD analysis of S-metolachlor (Dual Gold) in cotton plant and soil in trial field.
- Authors
Pengying Cao; Fengmao Liu; Suli Wang; Yuhong Wang; Lijun Han
- Abstract
The analytical method of S-metolachlor residue and its degradation in cotton and soil in trial field were investigated. S-metolachlor EC (96% w/ w) was applied as pre-emergence at dosages of 1,500 and 2,250 ml ha−1 3 days after sowing of the cottonseeds in the field. The soil and the plant samples were collected at different intervals and the residues of S-metolachlor were analyzed by GC–ECD. The results showed that the degradation of S-metolachlor in cotton leaves in Beijing and Nanjing coincides with C = 0.1113e−0.1050t and C = 0.1177e−0.1580t, respectively; the half-lives were about 6.6 and 4.4 days. The degradation of S-metolachlor in soil in Beijing and Nanjing coincides with C = 1.0621e−0.0475t, and C = 0.9212e−0.0548t, respectively; the half-lives were about 14.6 and 12.6 days,. At harvest time, the S-metolachlor in cotton seeds and soil samples were detected by GC–ECD and confirmed by GC/MS. The results showed that the residues in cottonseeds were lower than the USA EPA’s maximum residue limit of 0.1 mg kg−1 in cottonseed. It could be considered as safe to human beings and environment.
- Subjects
UNITED States; ALACHLOR; AGRICULTURAL wastes; ENVIRONMENTAL degradation; HALF-life (Nuclear physics); SOIL testing
- Publication
Environmental Monitoring & Assessment, 2008, Vol 143, Issue 1-3, p1
- ISSN
0167-6369
- Publication type
Article
- DOI
10.1007/s10661-007-9942-5