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A novel poly(3,4-ethylenedioxythiophene)-ionic liquid composite coating for the headspace solid-phase microextraction and gas chromatography determination of several alcohols in soft drinks.

Analytica chimica acta (2014-12-03)
Mian Wu, Haibo Zhang, Faqiong Zhao, Baizhao Zeng
ABSTRACT

A novel poly(3,4-ethylenedioxythiophene)-ionic liquid (i.e., 1-hydroxyethyl-3-methyl imidazolium-bis[(trifluoromethyl)sulfonyl]imide) composite film was electrodeposited on a Pt wire for headspace solid-phase microextraction. The film showed nodular structure and had large specific surface. In addition, it displayed high thermal stability (up to 300°C) and durable property (could be used for more than 200 times). Coupled with gas chromatography-flame ionization detection, the resulting fiber was applied to the headspace solid-phase microextraction and determination of several alcohols (i.e., linalool, nonanol, terpineol, geraniol, decanol and dodecanol). It presented higher extraction capability in comparison with the poly(3,4-ethylenedioxythiophene) and commercial polydimethylsiloxane/divinylbenzene fiber. Under the optimized conditions, the linear ranges exceeded three magnitudes with correlation coefficients above 0.9952 and the low limits of detection were 34.2-81.3ng L(-1). For different alcohols the repeatabilities (defined as RSD) were <5.8% and <7.8% for single fiber (n=5) and fiber-to-fiber (n=4), respectively. The proposed method was applied to the determination of these alcohols in real samples with acceptable recoveries from 81.1% to 106.6%.

MATERIALS
Product Number
Brand
Product Description

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SPME fiber assortment kit 3
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SPME fiber assembly polyacrylate (PA), df 85 μm (PA), for use with manual holder, needle size 24 ga
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SPME Fiber Assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), df 60 μm (PDMS/DVB), for use with autosampler/HPLC, needle size 24 ga, StableFlex fiber
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SPME fiber assortment kit 1, for use with manual holder, needle size 24 ga
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SPME fiber assortment kit 2, for use with manual holder, needle size 24 ga
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SPME fiber assortment kit 4, for use with manual holder, size 24 ga
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SPME fiber assortment kit 5, needle size 23 ga, for use with autosampler
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SPME StableFlex fiber assortment kit, for use with manual holder
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SPME fiber assembly polyacrylate (PA), df 85 μm (PA), for use with autosampler, needle size 24 ga
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SPME fiber assembly Polydimethylsiloxane (PDMS), df 7 μm (PDMS), needle size 24 ga, for use with autosampler
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SPME Fiber Assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), df 65 μm (PDMS/DVB), needle size 24 ga, for use with manual holder
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SPME fiber assembly, Carbowax-Polyethylene Glycol (PEG) Coating, needle size 23 ga, df 60 μm (PEG), for use with autosampler
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SPME fiber assortment kit 1, for use with autosampler, needle size 24 ga
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SPME fiber assortment kit 2, for use with autosampler, size 24 ga
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SPME fiber assortment kit 4, for use with autosampler, size 24 ga
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SPME LC Tips, PDMS/DVB, pkg of 96 ea
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SPME StableFlex fiber assortment kit, for use with autosampler, needle size 24 ga
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SPME fiber assembly polyacrylate (PA), df 85 μm (PA), for use with autosampler, needle size 23 ga
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SPME fiber assembly Polydimethylsiloxane (PDMS), df 7 μm (PDMS), needle size 23 ga, for use with autosampler
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SPME Fiber Assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), fused silica fiber, df 65 μm (PDMS/DVB), for use with manual holder, needle size 23 ga