Identification and quantification of odours from oxobiodegradable polyethylene oxidised under a free radical flow by headspace solid-phase microextraction followed by gas chromatography-olfactometry-mass spectrometry

Wrona, M. (Universidad de Zaragoza) ; Vera, P. (Universidad de Zaragoza) ; Pezo, D. (Universidad de Zaragoza) ; Nerín, C. (Universidad de Zaragoza)

Resumen: Recently oxobiodegradable polyethylene gained popularity as food packaging material due to its potential to reduce polymer waste. However, this type of material can release after its oxidation off-odour compounds that affect the organoleptic properties of packaged food. Odour compounds released from both polyethylene and oxobiodegradable polyethylene before and after oxidation under a free radicals flow were investigated after 1 day, 2 days and 3 days of oxidation. The samples were analysed using headspace solid phase microextraction followed by gas chromatography-mass spectrometry and headspace solid phase microextraction coupled to gas chromatography-olfactometry-mass spectrometry. Sixty-two different odorous compounds were identified. 4-methylthio-2-butanone (fruit), nonanal (fat) and 3, 6-nonadienal (fat) were present in different materials before oxidation. Multiple headspace-solid phase microextraction has been used to quantify all analytes. The most abundant compound was (Z)-3-hexenyl hexanoate with a concentration range between 1.5791±0.1387 µg/g and 4.8181±0.3123 µg/g. Compounds such as 2-dodecenal, 2-octenal, 2-pentanol, 3-nonenal, 3, 6-nonadienal, ethyl 3-methylbutanoate, ethyl octenoate, hexanone, isopropyl hexanoate, octanal were below their LOD evaluated using MS detector; however, they were detected by gas chromatography-olfactometry. The minimum LOD and LOQ were 0.011 µg/g and 0.036 µg/g, respectively.

Idioma: Inglés

DOI: 10.1016/j.talanta.2017.05.022

Año: 2017

Publicado en: Talanta 172 (2017), 37-44
ISSN: 0039-9140

Factor impacto JCR: 4.244 (2017)

Categ. JCR: CHEMISTRY, ANALYTICAL rank: 9 / 78 = 0.115 (2017) - Q1 - T1

Factor impacto SCIMAGO: 1.186 - Chemistry (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MEC/FPU-AP2012-2716
Financiación: info:eu-repo/grantAgreement/ES/MICINN/IPT-2011-1662-060000

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Química Analítica (Dpto. Química Analítica)
Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)
Área (Departamento): Proy. investigación HVA (Dpto. Química Analítica)