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| A Major Degradation Product′s Dynamic Changes and Toxicity to Gambusia affinis of Carbosulfan in Water |
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| KeyWord:carbosulfan; dynamic changes; Gambusia affinis; toxicity |
| Author Name | Affiliation | | PAN Bo | Institute of Environment and Plant Protection, Academy of Tropical Agriculture Sciences of China
Danzhou Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture, P.R.China | | LIN Yong | Institute of Environment and Plant Protection, Academy of Tropical Agriculture Sciences of China
Danzhou Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture, P.R.China | | JIANG Lei | Institute of Environment and Plant Protection, Academy of Tropical Agriculture Sciences of China
Key Laboratory of Pests Comprehensive Governance for Tropical crops, Ministry of Agriculture, P.R.China | | CHU Xiao-qiang | Institute of Environment and Plant Protection, Academy of Tropical Agriculture Sciences of China
Key Laboratory of Pests Comprehensive Governance for Tropical crops, Ministry of Agriculture, P.R.China | | LIU Ying | Institute of Environment and Plant Protection, Academy of Tropical Agriculture Sciences of China
Key Laboratory of Pests Comprehensive Governance for Tropical crops, Ministry of Agriculture, P.R.China |
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| Abstract: |
| A method for the determination of carbofuran residues in the water was developed by SPE-HPLC. Residues in water were extracted with acetonitrile, followed by cleanup with SPE column. The extracted samples were analyzed by HPLC with post-column derivatization system and fluorescence detector. The correlation coefficient（R2） of this method was 0.999 9. In this study, to analyze carbofuran’s dynamic changes in water, carbosulfan technical（90%） and formulation（20% EC） was added to water in the same carbosulfan concentration as 0.1, 0.2, 0.6, 1.2 mg·L-1 and 1.8 mg·L-1, respectively. Then, at the end of 96 h, the contents of carbofuran ranged from 0.018 mg·L-1 to 0.244 mg·L-1 for water treated with carbosulfan technical（90%）, Whereas, for water treated with carbosulfan formulation（20% EC）, the concentrations of carbofuran ranged from 0.020 mg·L-1 to 0.276 mg·L-1. Meanwhile, the LC50 of 96 h for Gambusia affinis exposed to carbosulfan technical（90%） and formulation（20% EC）, was 0.079 mg·L-1 and 0.047 mg·L-1, respectively. Thus, when applied to water, compared to carbosulfan technical（90%）, carbosulfan 20% EC formulation exhibited stronger toxicity to Gambusia affinis, and, the acute toxicity of carbosulfan to Gambusia affinis would be replaced by the joint toxicity of carbosulfan and its degradation products. |
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