title: Application of an ampholine-functionalized hybrid organic-inorganic silica material for the SPE of aromatic amines.
abstract: An SPE cartridge based on an ampholine-functionalized hybrid organic-inorganic silica sorbent has been adopted for the analysis of aromatic amines including 4-aminobiphenyl, benzidine, 2-naphthylamine, p-chloroaniline, 2,4,5-trimethylaniline, and 3,3'-dichlorobenzidine. Crucial variables governing the extraction efficiency of the material such as the pH of sample, sample loading volume, solvent used for elution, and elution volume have been thoroughly optimized. The adsorption capacities for the six aromatic amines ranged from 0.17 to 1.82 μg/mg. The recoveries of aromatic amines spiked in textile samples ranged from 78.9 to 103.0%, with RSDs of 1.1-11.9% (n = 3). Moreover, the extraction efficiency of the ampholine-functionalized hybrid organic-inorganic silica sorbent was at least comparable with that of Oasis WCX.
authors.affiliation: Xiangshan Entry-Exit Inspection and Quarantine, Xiangshan, China.
authors.forename: Yihui
authors.initials: Y
authors.lastname: Chen
authors.forename: Tingting
authors.initials: T
authors.lastname: Wang
authors.forename: Junfeng
authors.initials: J
authors.lastname: Ma
authors.forename: Zhen
authors.initials: Z
authors.lastname: Liang
authors.forename: Mingliang
authors.initials: M
authors.lastname: Chen
authors.forename: Jianghua
authors.initials: J
authors.lastname: Fang
authors.forename: Haoqi
authors.initials: H
authors.lastname: Gao
authors.forename: Lihua
authors.initials: L
authors.lastname: Zhang
authors.forename: Yukui
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D000327:Adsorption; D000588:Amines / Q000737:chemistry / Q000302:isolation & purification*; D000665:Ampholyte Mixtures / Q000737:chemistry / Q000302:isolation & purification*; D012822:Silicon Dioxide / Q000737:chemistry*; D052616:Solid Phase Extraction / Q000295:instrumentation / Q000379:methods*
chemical_list: D000588:Amines; D000665:Ampholyte Mixtures; D012822:Silicon Dioxide
keywords: Ampholine; Aromatic amine; Hybrid silica; SPE