Ageing and retail display time in raw beef odour according to the degree of lipid oxidation.

Ageing and retail display time in raw beef odour according to the degree of lipid oxidation.

Food chemistry (2017-10-19)

Virginia C Resconi, Mónica Bueno, Ana Escudero, Danielle Magalhaes, Vicente Ferreira, M Mar Campo

ABSTRACT

This study aims to assess the changes in beef aroma over time when steaks from pre-aged knuckles are stored in retail display under high oxygen conditions for 15 or 22days in vacuum conditions. Odorous volatile compounds were analysed by solid-phase microextraction/gas chromatography-mass spectrometry. Results were grouped as low, medium and high oxidative groups according to thiobarbituric acid reactive substances values after 9days of display. The intensity of off-odours in the raw meat increased with ageing and display time and oxidative groups. Based on correlations between the variables and regressions of the compounds through display, eight compounds were proposed as odour shelf-life markers. Among them, five were most sensitive and precise in all oxidative groups: 1-hexanol in meat aged for 15days, ethyl- octanoate and 2-pentylfuran in meat aged for 22days, and pentanoic and hexanoic acids in the two studied ageing times.

MATERIALS

Product Number

Brand

Product Description

57325-U

Supelco

SPME fiber assortment kit 4, for use with autosampler, size 24 ga

57551-U

Supelco

SPME StableFlex^™ fiber assortment kit, needle size 24 ga, for use with autosampler

57285-U

Supelco

SPME fiber assortment kit 1, for use with autosampler, needle size 23 ga

57286-U

Supelco

SPME fiber assortment kit 2, for use with autosampler, needle size 23 ga

57902-U

Supelco

SPME Fiber Assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), d_f 65 μm(PDMS/DVB, for use with autosampler, needle size 23 ga, metal alloy fiber

57307

Supelco

SPME fiber assortment kit 1, for use with autosampler, needle size 24 ga

57550-U

Supelco

SPME StableFlex^™ fiber assortment kit, for use with manual holder

57306

Supelco

SPME fiber assortment kit 1, for use with manual holder, needle size 24 ga

W342300

Sigma-Aldrich

trans-2-Undecenal, ≥95%, stabilized, FG

255653

Sigma-Aldrich

trans-2-Nonenal, 97%

108383

Sigma-Aldrich

1,1,3,3-Tetramethoxypropane, 99%

W316504

Sigma-Aldrich

trans-2-Heptenal, ≥95%, stabilized, FG

57362-U

Supelco

SPME fiber assortment kit 5, needle size 23 ga, for use with autosampler

57284-U

Supelco

SPME StableFlex^™ fiber assortment kit, needle size 23 ga, for use with autosampler

57321-U

Supelco

SPME fiber assortment kit 2, for use with autosampler, size 24 ga

57287-U

Supelco

SPME fiber assortment kit 4, for use with autosampler, needle size 23 ga

57324-U

Supelco

SPME fiber assortment kit 4, for use with manual holder, size 24 ga

57320-U

Supelco

SPME fiber assortment kit 2, for use with manual holder, needle size 24 ga

269956

Sigma-Aldrich

trans-2-Octenal, technical grade, 94%

57311

Supelco

SPME Fiber Assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), d_f 65 μm(PDMS/DVB, needle size 24 ga, for use with autosampler

115606

Sigma-Aldrich

Hexanal, 98%

57354-U

Supelco

SPME fiber assembly, Carbowax-Polyethylene Glycol (PEG) Coating, needle size 23 ga, d_f 60 μm(PEG, for use with autosampler

57328-U

Supelco

SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 24 ga, for use with manual holder, StableFlex fiber

57342-U

Supelco

SPME fiber assembly Polydimethylsiloxane (PDMS), d_f 100 μm(PDMS, for use with manual holder, needle size 23 ga

57291-U

Supelco

SPME fiber assembly Polydimethylsiloxane (PDMS), d_f 7 μm(PDMS, needle size 23 ga, for use with autosampler

57293-U

Supelco

SPME Fiber Assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), d_f 65 μm(PDMS/DVB, needle size 23 ga, PDMS/DVB StableFlex, for use with autosampler

57298-U

Supelco

SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 23 ga, StableFlex, for use with autosampler, fiber L 1 cm, pk of 3

57302

Supelco

SPME fiber assembly Polydimethylsiloxane (PDMS), d_f 7 μm(PDMS, needle size 24 ga, for use with manual holder

57304

Supelco

SPME fiber assembly polyacrylate (PA), d_f 85 μm(PA, for use with manual holder, needle size 24 ga

57310-U

Supelco

SPME Fiber Assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), d_f 65 μm(PDMS/DVB, needle size 24 ga, for use with manual holder