【摘 要】
:
The objectives of this study were to optimize instrumental parameters and conditions for analysis of selected organophosphorus pesticides (OPPs) by gas chromato
【机 构】
:
Institute of Subtropical Agriculture,Institute of Soil Science
【基金项目】
:
中国科学院知识创新工程项目;国家重点基础研究发展计划(973计划);国家自然科学基金
论文部分内容阅读
The objectives of this study were to optimize instrumental parameters and conditions for analysis of selected organophosphorus pesticides (OPPs) by gas chromatography (GC) with nitrogen-phosphorus detection (NPD) (GC-NPD); to select an appropriate solvent system; to conduct a comparison of sonication and shaking extractions; and to select an appropriate procedure for extracting organophosphorus pesticides from soils. Procedure Ⅰ consisted of n-hexane or petroleum ether together with acetone used as solvents, while Procedure Ⅱ contained several solvents including acetone,methanol, dichloromethane, and n-hexane or petroleum ether. Experimental results indicated that a mixture of petroleum ether/acetone (2:1, v/v) could be used in place of n-hexane/acetone (2:1, v/v) as it was a less expensive solvent system.In addition, shaking under a water bath at 20 ℃ was more effective than sonication. Also, Procedure Ⅰ was more effective,safer, and more timesaving than Procedure Ⅱ. Procedure I was applied to three soil types of different organic matter content, with recoveries of the OPPs from the yellow-brown soils, which had a higher organic matter content, being lower than those from the yellow and red soils.
其他文献
Terylene artificial silk printing and dyeing wastewater(TPD wastewater), containing averaged 710 mg/L terephthalic acid(TA) as the main carbon source and the ch
The aim of this research is to find substitute barrier materials for natural clay from two kinds of municipal sludge: waterworks sludge(Sw) and dredging sludge(
Bio-surfactant is a new type of surfactant that is produced in microbial metabolism. Adding bio-surfactant during composting process, especially to those contai
A novel process, microwave assisted catalytic wet air oxidation(MW-CWO), was applied for the degradation of H-acid( 1-amino8-naphthol-3, 6-disulfonic acid) in a
To determine the factor influencing the abundance development and distribution of Simulium damnosum(S. I) immature stages in the lower Cross River Basin, Nigeri
The dissolved organic matter(DOM), water soluble organic matter derived from sewage sludge was separated into hydrophobic fraction(Ho) and hydrophilic fraction(
Thirty-nine deep subsurface soils( 150-180 Gm depth) near the outskirts of Beijing were investagated. The concentrations including n-alkanes from C13 to C36, pr
Element cycling in the dominant plant communities including Rh. aureum, Rh. redowskianum and Vaccinium uliginosum in the Alpine tundra zone of Changbai Mountain
When municipal solid waste(MSW) with high content of food waste is landfilled, the rapid hydrolysis of food waste results in the imbalance of anaerobic metaboli
2-(4-Dimethylaminophenyl)-5-fluoro-6-(morpholin-4-yl)- 1H-benzimidazole(1) has been synthesized and characterized by 1H-NMR, MS and elemental analysis. UV-Vis s