title: Electromembrane extraction of diamine plastic restricted substances in soft drinks followed by capillary electrophoresis with contactless conductivity detection.
abstract: Ethane-1,2-diamine (EA) and hexane-1,6-diamine (HA) are two important plastic restricted substances commonly existing in food contact materials. A capillary electrophoresis with capacitively coupled contactless conductivity detection (CE-C4D) method has been developed for direct determination of above analytes, and the detection sensitivity has been significantly improved based on electromembrane extraction (EME). Under the optimum conditions, EA and HA could be well separated from their aliphatic diamine homologs as well as the common inorganic cations within 25min. The limits of detection could reach sub-ng/mL level, and good linearity (r>0.998) between peak area and analyte concentration could be obtained at three orders of magnitude. This EME/CE-C4D method provided a novel application for determining these plastic restricted substances in different bottled soft drinks, providing an alternative for the sensitive analyses of diamine substances.
authors.affiliation: School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Liu
authors.affiliation: School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Guo
authors.affiliation: School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
authors.affiliation: School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China.
authors.forename: Fengying
authors.initials: F
authors.lastname: Huang
authors.affiliation: School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Shi
authors.affiliation: School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China.
authors.forename: Ge
authors.initials: G
authors.lastname: Gao
authors.affiliation: School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China.
authors.forename: Xiaoxin
authors.initials: X
authors.lastname: Wang
authors.affiliation: School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China.
authors.forename: Jiannong
authors.initials: J
authors.lastname: Ye
authors.affiliation: School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China. Electronic address: qcchu@chem.ecnu.edu.cn.
authors.forename: Qingcui
authors.initials: Q
authors.lastname: Chu
mesh_terms: D002253:Carbonated Beverages / Q000032:analysis*; D003959:Diamines / Q000032:analysis* / Q000302:isolation & purification; D019075:Electrophoresis, Capillary / Q000379:methods*; D005029:Ethylenediamines / Q000032:analysis* / Q000302:isolation & purification; D057230:Limit of Detection; D010969:Plastics / Q000032:analysis*
chemical_list: D003959:Diamines; D005029:Ethylenediamines; D010969:Plastics; C031234:ethylenediamine; C007297:1,6-diaminohexane
keywords: Aliphatic diamine; Capacitively coupled contactless conductivity detection; Capillary electrophoresis; Electromembrane extraction; Plastic restricted substances; Soft drinks