Composition and color stability of carbon monoxide treated dried porcine blood

• Published in: Meat science Vol. 85; no. 3; pp. 472 - 480
• Main Authors: Fontes, P.R., Gomide, L.A.M., Fontes, E.A.F., Ramos, E.M., Ramos, A.L.S.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.07.2010; [Amsterdam]: Elsevier Science; Elsevier
• Subjects: Animals; bags; Biological and medical sciences; Blood; Carbon Monoxide; Color; Desiccation; Dietary Proteins; discoloration; dried foods; Dried swine blood; drying quality; Food Handling - methods; Food industries; food packaging; Fundamental and applied biological sciences. Psychology; General aspects; Handling, storage, packaging, transport; Hydrogen-Ion Concentration; Meat; Meat and meat product industries; meat byproducts; Nylons; Packaging; packaging materials; plastic film; Polyethylene; pork; refractive index; spray drying; Swine; Packaging; Dried swine blood; Carbon monoxide; Color; Farming animal; Stability; Meat product; Blood; Pig; Vertebrata; Meat animals; Mammalia; Quality; Chemical composition; Artiodactyla; Conditioning; Ungulata
• ISSN: 0309-1740; 1873-4138
• DOI: 10.1016/j.meatsci.2010.02.018

Color stability of swine blood was studied over 12 weeks of storage in plastic bags, after pH (7.40, 6.70, or 6.00) adjustment, saturation with carbon monoxide (CO) and spray-drying. CO-treated dried blood presented a redder color and higher reflectance between 610 and 700 nm, compared to a brownish-red color and lower reflectance of untreated samples. As indicated by reflectance spectra, blood pH adjustment did not influence ( P > 0.05) the initial color of dried blood but influenced ( P < 0.05) its color stability (browning index). During storage, CO-treated blood showed a reduction in reflectance percentages as well as in CIE L ∗ and a ∗ values, which was more pronounced in polyethylene (OTR = 4130 cm 3/m 2/day/atm) packaged samples. After 12 weeks of storage, CO-treated samples packaged in high OTR bags presented color indexes similar to those of the untreated dried samples. CO-treated samples packaged in nylon-polyethylene (OTR = 30–60 cm 3/m 2/day/atm) bags showed a smaller rate of discoloration and color difference (Δ E ∗) between the CO-treated and untreated samples. Even with some darkening, packaging CO-treated dry blood in low OTR bags still gives an acceptable reddish color after 12 weeks of storage while untreated dry blood has a brownish color just after drying.