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

57550-U

Supelco

SPME Fiber Assembly Kit, Assortment, StableFlex (1 cm), needle size 24 ga, Manual Holder, pk of 4

57306

Supelco

SPME Fiber Assembly Kit, Assortment #1, Fused Silica (1 cm), needle size 24 ga, Manual Holder, pk of 3

57321-U

Supelco

SPME Fiber Assembly Kit, Assortment #2, Fused Silica (1 cm), size 24 ga, Autosampler, pk of 3

57324-U

Supelco

SPME Fiber Assembly Kit, Assortment #4, Fused Silica (1 cm), size 24 ga, Manual Holder, pk of 3

57307

Supelco

SPME Fiber Assembly Kit, Assortment #1, Fused Silica (1 cm), needle size 24 ga, Autosampler, pk of 3

57284-U

Supelco

SPME Fiber Assembly Kit, Assortment, StableFlex (1 cm), needle size 23 ga, Autosampler, pk of 4

57285-U

Supelco

SPME Fiber Assembly Kit, Assortment #1, Fused Silica (1 cm), needle size 23 ga, Autosampler, pk of 3

57286-U

Supelco

SPME Fiber Assembly Kit, Assortment #2, Fused Silica (1 cm), needle size 23 ga, Autosampler, pk of 3

57287-U

Supelco

SPME Fiber Assembly Kit, Assortment #4, Fused Silica (1 cm), needle size 23 ga, Autosampler, pk of 3

57320-U

Supelco

SPME Fiber Assembly Kit, Assortment #2, Fused Silica (1 cm), needle size 24 ga, Manual Holder, pk of 3

57551-U

Supelco

SPME Fiber Assembly Kit, Assortment, StableFlex (1 cm), needle size 24 ga, Autosampler, pk of 4

57325-U

Supelco

SPME Fiber Assembly Kit, Assortment #4, Fused Silica (1 cm), size 24 ga, Autosampler, pk of 3

W316504

Sigma-Aldrich

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

W342300

Sigma-Aldrich

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

255653

Sigma-Aldrich

trans-2-Nonenal, 97%

115606

Sigma-Aldrich

Hexanal, 98%

108383

Sigma-Aldrich

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

269956

Sigma-Aldrich

trans-2-Octenal, technical grade, 94%

57362-U

Supelco

SPME Fiber Assembly Kit, Assortment #5, Fused Silica (1 cm), needle size 23 ga, Autosampler, pk of 4

57928-U

Supelco

SPME Fiber Assembly, 100 μm PDMS, Metal Alloy (1 cm), needle size 23 ga, Autosampler, pk of 1, red hub

57355-U

Supelco

SPME Fiber Assembly, 60 μm PEG, Metal Alloy (1 cm), needle size 23 ga, Manual Holder, pk of 3, purple hub

57354-U

Supelco

SPME Fiber Assembly, 60 μm PEG, Metal Alloy (1 cm), needle size 23 ga, Autosampler, pk of 3, purple hub

57906-U

Supelco

SPME Fiber Assembly, 85 μm CAR/PDMS, Metal Alloy (1 cm), needle size 23 ga, Autosampler, pk of 1, light blue hub

57912-U

Supelco

SPME Fiber Assembly, 50/30µm DVB/CAR/PDMS, Metal Alloy (1cm), needle size 23 ga, Autosampler, pk of, plain gray hub

57902-U

Supelco

SPME Fiber Assembly, 65 μm PDMS/DVB, Metal Alloy (1 cm), needle size 23 ga, Autosampler, pk of 1, pink hub

W287407

Sigma-Aldrich

Phenylacetaldehyde, ≥95%, FCC, FG

148962

Sigma-Aldrich

Ethyl hexanoate, ≥99%

W331708

Sigma-Aldrich

2-Pentylfuran, ≥98%, FG

504823

Supelco

SPME Portable Field Sampler, coating PDMS

57294-U

Supelco

SPME Fiber Assembly, 85 μm Polyacrylate, Fused Silica (1 cm), needle size 23 ga, Autosampler, pk of 3, white hub