Article

Elimination of matrix effects for headspace solid-phase microextraction of important volatile compounds in red wine using a novel coating

Department of Chemistry, Wuhan University, Wuhan 430072, PR China
Analytica Chimica Acta DOI:10.1016/j.aca.2005.03.029 pp.341-353

ABSTRACT In this paper, hydroxy-terminated silicone oil-butyl methacrylate-divinylbenzene (OH-TSO-BMA-DVB) copolymer was first synthesized and used as stationary phase with the aid of γ-methacryloxypropyltrimethoxylsilane (KH-570) as bridge in solid-phase microextraction (SPME) using sol–gel method and cross-linking technique. It has high extraction efficiency for both polar alcohols and fatty acids and nonpolar esters in comparison with commercial PDMS, PDMS-DVB and PA fibers. A simple and sensitive headspace SPME-gas chromatography (HS-SPME-GC) method using the novel fiber was presented for the simultaneous analysis of both polar alcohols and fatty acids and nonpolar esters in wine. To check the matrix effects, various model wine matrices, including distilled water; 11.5% ethanol/water (v/v) solution; a concentrated synthetic wine; a ‘volatile-free’ wine and a real wine were investigated in detail. Matrix effects were compensated for by using internal standard method and selecting the ‘volatile-free’ wine as working standard. The method presented in this study showed satisfactory linearity, precision, detection limits and accuracy. The recoveries obtained ranged from 85.87 to 104.2%, and the relative standard deviation values were below 9%. The results obtained indicated that the present method is a validated and accurate procedure for the simultaneous determination of both polar and nonpolar aroma compounds in wine.

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    Article: Progress of solid-phase microextraction coatings and coating techniques.
    Guibin Jiang, Minjia Huang, Yaqi Cai, Jianxia Lv, Zongshan Zhao
    [show abstract] [hide abstract]
    ABSTRACT: Solid-phase microextraction (SPME) has been popular as an environmentally friendly sample pretreatment technique to extract a very wide range of analytes. This is partly owing to the development of SPME coatings. One of the key factors affecting the extraction performances, such as the sensitivity, selectivity, and reproducibility, is the properties of the coatings on SPME fibers. This paper classifies the materials used as SPME coatings and introduces some common preparation techniques of SPME coating in detail, such as sol-gel technique, electrochemical polymerization technique, particle direct pasting technique, restricted access matrix SPME technique, and molecularly imprinted SPME technique.
    Journal of chromatographic science 07/2006; 44(6):324-32. · 0.88 Impact Factor
Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.

Keywords

concentrated synthetic wine
 
fatty acids
 
hydroxy-terminated silicone oil-butyl methacrylate-divinylbenzene
 
internal standard method
 
nonpolar aroma compounds
 
nonpolar esters
 
novel fiber
 
PA fibers
 
polar alcohols
 
present method
 
relative standard deviation values
 
satisfactory linearity
 
sensitive headspace SPME-gas chromatography
 
simultaneous analysis
 
simultaneous determination
 
solid-phase microextraction
 
sol–gel method
 
stationary phase
 
various model wine matrices
 
‘volatile-free’ wine
 

Mingming Liu