In this study, the time dependent effect of non thermal plasma (NTP) application (15 kV, AC power supply) on the volatile profile of milk was investigated by gas chromatography–mass spectrometry, based on solid-phase microextraction (SPME) analysis. Plasma was applied at time intervals of 0, 3, 6, 9, 12, 15 and 20 min. More than 50 volatile organic compounds were separated and identified. The exposure to NTP treatments resulted in a significant increase in the content of the total aldehydes for milk samples treated for 15 min. Furthermore, the comparison of chromatographic data of control samples with those treated with NTP suggested that the content of total alcohols in the NTP treated samples was slightly higher, while that of the hydrocarbons was not affected by LTP treatment. The molecules significantly affected by NTP treatments included; 2 heptanone, nonanal, 2 octenal, 1 octanol and benzaldyde which showed a marked increase following exposure to the plasma.
The effect of low temperature plasma on volatile profile of milk / Ozen F.; Gurol C.; Ekinci FY; Aslan N; Guerzoni ME; Vannini L; Gottardi D; Korachi M. - In: JOURNAL OF BIOTECHNOLOGY. - ISSN 0168-1656. - STAMPA. - 161:S(2012), pp. 43-43. [10.1016/j.jbiotec.2012.07.137]
The effect of low temperature plasma on volatile profile of milk
VANNINI, LUCIA;GOTTARDI, DAVIDE;
2012
Abstract
In this study, the time dependent effect of non thermal plasma (NTP) application (15 kV, AC power supply) on the volatile profile of milk was investigated by gas chromatography–mass spectrometry, based on solid-phase microextraction (SPME) analysis. Plasma was applied at time intervals of 0, 3, 6, 9, 12, 15 and 20 min. More than 50 volatile organic compounds were separated and identified. The exposure to NTP treatments resulted in a significant increase in the content of the total aldehydes for milk samples treated for 15 min. Furthermore, the comparison of chromatographic data of control samples with those treated with NTP suggested that the content of total alcohols in the NTP treated samples was slightly higher, while that of the hydrocarbons was not affected by LTP treatment. The molecules significantly affected by NTP treatments included; 2 heptanone, nonanal, 2 octenal, 1 octanol and benzaldyde which showed a marked increase following exposure to the plasma.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
