title: Determination of semi-volatile additives in wines using SPME and GC-MS.
abstract: Parameters of headspace solid-phase microextraction, such as fiber coating (85μm CAR/PDMS), extraction time (2min for white and 3min for red wines), temperature (85°C), pre-incubation time (15min) were optimized for identification and quantification of semi-volatile additives (propylene glycol, sorbic and benzoic acids) in wines. To overcome problems in their determination, an evaporation of the wine matrix was performed. Using the optimized method, screening of 25 wine samples was performed, and the presence of propylene glycol, sorbic and benzoic acids was found in 22, 20 and 6 samples, respectively. Analysis of different wines using a standard addition approach showed good linearity in concentration ranges 0-250, 0-125, and 0-250mg/L for propylene glycol, sorbic and benzoic acids, respectively. The proposed method can be recommended for quality control of wine and disclosing adulterated samples.
authors.affiliation: Al-Farabi Kazakh National University, Center of Physical Chemical Methods of Research and Analysis, Almaty, Kazakhstan. Electronic address: sagandykova.gulyaim1@gmail.com.
authors.forename: Gulyaim N
authors.initials: GN
authors.lastname: Sagandykova
authors.affiliation: Al-Farabi Kazakh National University, Center of Physical Chemical Methods of Research and Analysis, Almaty, Kazakhstan. Electronic address: alimzhanova.mereke@gmail.com.
authors.forename: Mereke B
authors.initials: MB
authors.lastname: Alimzhanova
authors.affiliation: Al-Farabi Kazakh National University, Center of Physical Chemical Methods of Research and Analysis, Almaty, Kazakhstan. Electronic address: n.yenlik@gmail.com.
authors.forename: Yenglik T
authors.initials: YT
authors.lastname: Nurzhanova
authors.affiliation: Al-Farabi Kazakh National University, Center of Physical Chemical Methods of Research and Analysis, Almaty, Kazakhstan. Electronic address: bkenesov@cfhma.kz.
authors.forename: Bulat
authors.initials: B
authors.lastname: Kenessov
mesh_terms: D001565:Benzoates / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D019946:Propylene Glycol / Q000032:analysis*; D052617:Solid Phase Microextraction / Q000379:methods*; D013011:Sorbic Acid / Q000032:analysis*; D014920:Wine / Q000032:analysis*
chemical_list: D001565:Benzoates; D019946:Propylene Glycol; D013011:Sorbic Acid
keywords: 1,2-Propylene glycol (PubChem CID: 1030); Adulteration; Benzoic acid (PubChem CID: 243); Gas chromatography; Mass spectrometry; Semi-volatile additives; Solid-phase microextraction; Sorbic acid (PubChem CID: 643460); Wine