首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Ultrasonic assisted headspace single drop micro-extraction and gas chromatography with nitrogen-phosphorus detector for determination of organophosphorus pesticides in soil
Authors:Amir Salemi  Reihaneh Rasoolzadeh  Massumeh Mohebbi Nejad  Maryam Vosough
Institution:1. Environmental Sciences Research Institute (ESRI), Shahid Beheshti University, G.C., Evin, Zip Code: 1983963113, Tehran, Iran;2. Chemistry and Chemical Engineering Research Center of Iran, P.O. Box 14335-186, Tehran, Iran
Abstract:This work describes optimization of headspace single drop micro-extraction for extraction of five organophosphorus pesticides; thionazin, sulfotep, dimethoate, disulfoton and parathion in soil. Ultrasound has also been used successfully to improve and accelerate the extraction of the analytes from the sample. The optimized extraction performance was obtained when the experimental parameters were set as follows; 3.0 μL of octanol as extraction solvent, high ionic strength (20% sodium chloride), 1:1 (w/v) sample dilution with water, extraction temperature at 60 °C for 30 min; applying ultrasound and without any pH adjustment. The optimized method was linear over the calibration range (5–200 and 10–300 for different analytes) with limits of detection of 0.1–2.0 ng g−1. The enrichment factor for OPPs was 1.4–12.7 and the method was also reproducible with the relative standard deviations (RSD%) of 2.1–6.9%.
Keywords:Gas chromatography  Nitrogen-phosphorus detector  Organophosphorus pesticide  Single drop micro-extraction  Ultrasonic assisted extraction
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号