Year-end Sale % OFF 
Abstract
Weak anion exchange sorbent based on cross-linked polystyrene with primary secondary amine group was prepared by substitution nucleophilic reaction (SN2) between methylene chloride group and 1,2-ethylene diamine. The effect of factors, namely the weight ratio of amine over methylene chloride, reaction time and temperature on nitrogen percentage were studied using experimental design approach. The amination yield rose as all of factors increased but was reduced while both temperature and time increased simultaneously. Nitrogen percentage of the products were varied from 4.0% to 6.3%. Sorbents with predicted capacity of 4.5%, 5.0%, 6.3%, and 6.5% were synthesized. The results showed that the actual capacities of the products were close to the predictions, especially for those in the experimental domain, indicating a good model that can be used to prepare sorbents of any desired capacity. The sorbent application ability of multiresidue pesticides analysis in food were initially investigated through both aspects: interference elimination and analyte content conservation.
Highlights
Crosslinked polystyrene and its modified materials are popular materials which were applied as sorbent of various analytes [1,2,3,4] due to their advantageous properties, namely, high surface area, chemical resistance, rigid structure
The aim of this work was to synthesize and test whether the primary secondary amine (PSA) sorbent based on cross-linked polystyrene can be used in QuEChERS method
It was found that all of factors, including temperature, time, and amine to methylene chloride ratio give an increase in capacity
Summary
Crosslinked polystyrene and its modified materials are popular materials which were applied as sorbent of various analytes [1,2,3,4] due to their advantageous properties, namely, high surface area, chemical resistance, rigid structure. The method includes three main steps (i) the extraction of pesticides with acetonitrile (ii) partition the analytes into acetonitrile phase by adding salts and (iii) a dispersive solid phase extraction for clean-up. This method and several modified versions have been applied for different types of matrices and pesticides [8,9,10,11]. The aim of this work was to synthesize and test whether the PSA sorbent based on cross-linked polystyrene can be used in QuEChERS method
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Science and Technology Development Journal - Natural Sciences
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
