title: Eggshell membrane-based biotemplating of mixed hemimicelle/admicelle as a solid-phase extraction adsorbent for carcinogenic polycyclic aromatic hydrocarbons.
abstract: A new solid-phase extraction (SPE) format was demonstrated, based on eggshell membrane (ESM) templating of the mixed hemimicelle/admicelle of linear alkylbenzenesulfonates (LAS) as an adsorbent for the enrichment of carcinogenic polycyclic aromatic hydrocarbons (PAHs) in environmental aqueous samples. The LAS mixed hemimicelle/admicelle formation and SPE of the target PAHs were conducted simultaneously by adding the organic target and LAS through a column filled with 500 mg of ESM. The effect of various factors, including LAS concentration, solution pH, ionic strength, and humic acid concentration on the recoveries of PAHs were investigated and optimized. The results showed that LAS concentration and solution pH had obvious effect on extraction of PAHs, and the recoveries of PAHs compounds decreased in the presence of salt and humic acid. Under the optimized analytical conditions, the present method could respond down to 0.1-8.6 ng/L PAHs with a linear calibration ranging from 0.02 to 10 μg/L, showing a good PAHs enrichment ability with high sensitivity. The developed method was used satisfactorily for the detection of PAHs in environmental water samples. The mixed hemimicelle/admicelle adsorbent exhibited high extraction efficiency to PAHs and good selectivity with respect to natural organic matter and was advantageous over commercial C₁₈ adsorbent, for example, high extraction yield, high breakthrough volume, and easy regeneration.
authors.affiliation: Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education; College of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, China.
authors.forename: Weidong
authors.initials: W
authors.lastname: Wang
authors.forename: Bo
authors.initials: B
authors.lastname: Chen
authors.forename: Yuming
authors.initials: Y
authors.lastname: Huang
mesh_terms: D000327:Adsorption; D017738:Alkanesulfonic Acids / Q000737:chemistry; D000818:Animals; D002274:Carcinogens, Environmental / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification*; D002645:Chickens; D002681:China; D004528:Egg Shell / Q000737:chemistry* / Q000648:ultrastructure; D004784:Environmental Monitoring / Q000191:economics / Q000379:methods*; D005525:Food-Processing Industry / Q000191:economics; D006812:Humic Substances / Q000032:analysis; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste / Q000032:analysis / Q000191:economics; D057230:Limit of Detection; D008566:Membranes / Q000737:chemistry / Q000648:ultrastructure; D008823:Micelles; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification*; D015203:Reproducibility of Results; D052616:Solid Phase Extraction; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D017738:Alkanesulfonic Acids; D002274:Carcinogens, Environmental; D006812:Humic Substances; D007220:Industrial Waste; D008823:Micelles; D011084:Polycyclic Aromatic Hydrocarbons; D062065:Wastewater; D014874:Water Pollutants, Chemical; C030641:alkylbenzyl sulfonic acid