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

D215554

Sigma-Aldrich

Dipropylene glycol, 99%, mixture of isomers

148962

Sigma-Aldrich

Ethyl hexanoate, ≥99%

W287407

Sigma-Aldrich

Phenylacetaldehyde, ≥95%, FCC, FG

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

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

57328-U

Supelco

SPME Fiber Assembly, 50/30µm DVB/CAR/PDMS, StableFlex (1cm), needle size 24 ga, Manual Holder, pk of 3, plain gray hub

57302

Supelco

SPME Fiber Assembly, 7 μm PDMS, Fused Silica (1 cm), needle size 24 ga, Manual Holder, pk of 3, green hub

57335-U

Supelco

SPME Fiber Assembly, 85 μm CAR/PDMS, StableFlex (1 cm), needle size 24 ga, Autosampler, pk of 3, light blue hub

57348-U

Supelco

SPME Fiber Assembly, 50/30µm DVB/CAR/PDMS, StableFlex (2cm), needle size 24 ga, Autosampler, pk of 3, notched gray hub

57342-U

Supelco

SPME Fiber Assembly, 100 μm PDMS, Fused Silica (1 cm), needle size 23 ga, Manual Holder, pk of 3, red hub

57357-U

Supelco

SPME Sampling Stand, for use with 15 mL vials

57333-U

Supelco

SPME Sampling Stand, for use with 4 mL vials

57319

Supelco

SPME Fiber Assembly, 75 μm CAR/PDMS, Fused Silica (1 cm), needle size 24 ga, Autosampler, pk of 3, black hub

57301

Supelco

SPME Fiber Assembly, 100 μm PDMS, Fused Silica (1 cm), needle size 24 ga, Autosampler, pk of 3, red hub

57305

Supelco

SPME Fiber Assembly, 85 μm Polyacrylate, Fused Silica (1 cm), needle size 24 ga, Autosampler, pk of 3, white hub

57326-U

Supelco

SPME Fiber Assembly, 65 μm PDMS/DVB, StableFlex (1 cm), needle size 24 ga, Manual Holder, pk of 3, pink hub

57311

Supelco

SPME Fiber Assembly, 65 μm PDMS/DVB, Fused Silica (1 cm), needle size 24 ga, Autosampler, pk of 3, blue hub

57359-U

Supelco

SPME Portable Field Sampler, coating PDMS/DVB

57346-U

Supelco

SPME Fiber Assembly, 65 μm PDMS/DVB, Fused Silica (1 cm), needle size 23 ga, Manual Holder, pk of 3, blue hub

57318

Supelco

SPME Fiber Assembly, 75 μm CAR/PDMS, Fused Silica (1 cm), needle size 24 ga, Manual Holder, pk of 3, black hub

57334-U

Supelco

SPME Fiber Assembly, 85 μm CAR/PDMS, StableFlex (1 cm), needle size 24 ga, Manual Holder, pk of 3, light blue hub

504831

Supelco

SPME Portable Field Sampler, coating CAR/PDMS

57327-U

Supelco

SPME Fiber Assembly, 65 μm PDMS/DVB, StableFlex (1 cm), needle size 24 ga, Autosampler, pk of 3, pink hub

57329-U

Supelco

SPME Fiber Assembly, 50/30µm DVB/CAR/PDMS, StableFlex (1 cm), needle size 24 ga, Autosampler, pk of 3, plain gray hub

57308

Supelco

SPME Fiber Assembly, 30 μm PDMS, Fused Silica (1 cm), needle size 24 ga, Manual Holder, pk of 3, yellow hub

57343-U

Supelco

SPME Fiber Assembly, 75 μm CAR/PDMS, Fused Silica (1 cm), needle size 23 ga, Autosampler, pk of 3, black hub

57309

Supelco

SPME Fiber Assembly, 30 μm PDMS, Fused Silica (1 cm), needle size 24 ga, Autosampler, pk of 3, yellow hub

57310-U

Supelco

SPME Fiber Assembly, 65 μm PDMS/DVB, Fused Silica (1 cm), needle size 24 ga, Manual Holder, pk of 3, blue hub

57344-U

Supelco

SPME Fiber Assembly, 75 μm CAR/PDMS, Fused Silica (1 cm), needle size 23 ga, Manual Holder, pk of 3, black hub