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  • Development of a functionalized polymeric ionic liquid monolith for solid-phase microextraction of polar endocrine disrupting chemicals in aqueous samples coupled to high-performance liquid chromatography.

Development of a functionalized polymeric ionic liquid monolith for solid-phase microextraction of polar endocrine disrupting chemicals in aqueous samples coupled to high-performance liquid chromatography.

Analytical and bioanalytical chemistry (2015-07-30)
Juanjuan Feng, Min Sun, Yanan Bu, Chuannan Luo
ABSTRACT

Ionic liquids (ILs) have been efficiently used as a "designer sorbent" in sample preparation. A novel 1-(3-aminopropyl)-3-(4-vinylbenzyl)imidazolium 4-styrenesulfonate IL monomer was synthesized and copolymerized with 1,6-di(3-vinylimidazolium) hexane bishexafluorophosphate IL as cross-linking agent to prepare a cross-linked polymeric ionic liquids (PILs) monolith. Coupled to high-performance liquid chromatography (HPLC), the PILs monolith was used as a solid-phase microextraction (SPME) sorbent to extract some polar endocrine disrupting chemical (EDCs) such as estrogens, bisphenol A, and phthalate esters in aqueous samples. Preparation and extraction conditions were investigated and optimized to obtain satisfactory extraction efficiency. Limits of detection (LODs) of the proposed method for three steroid estrogens and bisphenol A were 0.25 and 0.2 μg L(-1), respectively, which were lower than or comparable to some other sample preparation methods. Intra- and inter-day repeatability for all the analytes was 2.2-12%. The monolith-to-monolith repeatability was 7.4-15%. The extraction performance of the method for analysis of target estrogens in treated domestic wastewater was investigated and compared with a dispersive liquid-liquid microextraction (DLLME) method. The proposed SPME method provided better sensitivity and higher resistance to matrix interferences.

MATERIALS
Product Number
Brand
Product Description

Supelco
SPME fiber assortment kit 2, for use with autosampler, needle size 23 ga
Supelco
SPME StableFlex fiber assortment kit, needle size 23 ga, for use with autosampler
Supelco
SPME fiber assortment kit 4, for use with autosampler, needle size 23 ga
Supelco
SPME fiber assembly, Carbowax-Polyethylene Glycol (PEG) Coating, needle size 23 ga, df 60 μm (PEG), for use with autosampler
Supelco
SPME fiber assembly, Carbowax-Polyethylene Glycol (PEG) Coating, needle size 23 ga, df 60 μm (PEG), metal alloy fiber, for use with manual holder
Supelco
SPME Fiber Assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), df 65 μm (PDMS/DVB), for use with autosampler, needle size 23 ga, metal alloy fiber
Sigma-Aldrich
Diethylstilbestrol, mixture of cis and trans, 97%
Supelco
SPME fiber assortment kit 5, needle size 23 ga, for use with autosampler
Supelco
SPME fiber assortment kit 2, for use with manual holder, needle size 24 ga
Supelco
Bisphenol A, ≥99%
Sigma-Aldrich
Bisphenol A, 97%
Sigma-Aldrich
1,6-Dibromohexane, 96%
Sigma-Aldrich
4-Vinylbenzyl chloride, 90%
Supelco
SPME fiber assortment kit 1, for use with autosampler, needle size 24 ga
Supelco
SPME Fiber Assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), fused silica fiber, df 65 μm (PDMS/DVB), for use with manual holder, needle size 23 ga
Supelco
SPME Fiber Assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), df 65 μm (PDMS/DVB), needle size 24 ga, for use with autosampler
Supelco
SPME Fiber Assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), df 65 μm (PDMS/DVB), needle size 24 ga, for use with manual holder
Supelco
SPME fiber assortment kit 1, for use with manual holder, needle size 24 ga
Supelco
SPME StableFlex fiber assortment kit, for use with manual holder
Supelco
SPME fiber assortment kit 4, for use with manual holder, size 24 ga
Supelco
SPME Fiber Assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), df 65 μm (PDMS/DVB), needle size 24 ga, StableFlex, for use with manual holder
Supelco
SPME Fiber Assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), df 65 μm (PDMS/DVB), needle size 24 ga, StableFlex, for use with autosampler
Supelco
SPME fiber assortment kit 2, for use with autosampler, size 24 ga
Supelco
SPME Fiber Assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), df 65 μm (PDMS/DVB), for use with autosampler, needle size 23 ga
Supelco
SPME fiber assortment kit 1, for use with autosampler, needle size 23 ga
Supelco
SPME StableFlex fiber assortment kit, for use with autosampler, needle size 24 ga
Supelco
SPME Fiber Assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), df 65 μm (PDMS/DVB), needle size 23 ga, PDMS/DVB StableFlex, for use with autosampler
Supelco
SPME fiber assortment kit 4, for use with autosampler, size 24 ga
Sigma-Aldrich
Diethyl phthalate, ≥99%
Sigma-Aldrich
Diethyl phthalate, 99.5%