Rapid Analysis and Evaluation of Freshness of Chilled Pork Based on Color Difference

Abstract

Abstract: The variability during storage under 4 ℃ and 20 ℃ of chilled pork (longissimus dorsi muscle) was studied in globulin precipitation, sensory evaluation, pH, water content and the color and color parameters of pork surface and extract. The results indicated that the variations of globulin precipitation and pH in chilled had a significant difference. The color changes such as L* of pork surface under 20 ℃ and L*, b*, C and ΔE* of pork extract differ significantly (P＜0.05). The relationship between color changes and pH or storage time of chilled pork during storage was established. The CIE a* under 20 ℃, b* and C under 4 ℃ of pork surface as well as the L*, b*, C, and ΔE* of pork extract under 20 ℃ and L* under 4 ℃ were positively correlated with storage time. Moreover, the L* of pork surface under 4 ℃, the L*, b*, C and ΔE* of pork extract under both temperatures and a* under 4 ℃ were correlated positively with pH; when L* ＞48.73, a* ＞4.72 and b* ＞9.18, chilled pork could be identified as fresh meat in cold chain.

Key words: chilled pork, freshness, color, pH value, globulin precipitation

CLC Number:

TS207.3

References

[1]刘红林，吕艳丽.现代养猪大全[M].北京：中国农业出版社，2001
[2]麻建国，周建军.超声波技术在食品检测中的应用[J].食品与发酵工业,1998,24(5):52-57
[3]屠康.肉类品质无损检测技术的研究进展[J].西北农林科技大学学报,2005,33(1):25-28
[4]Savenije B, Geesink G H, Van der Palen J G P, et al.Prediction of pork quality using visible/near-infrared spectroscopy[J].Meat Science,2006,73(1):181-184
[5]孟耀勇,廖昱博.激光喇曼光谱技术在食品科学中的应用[J].激光生物学报,2006,15(4):429-435
[6]刘木华,赵杰文,郑建鸿,等.农畜产品品质无损检测中高光谱图像技术的应用进展[J].农业机械学报,2005,36(9):139-143
[7]滕安国,高峰,夏新成,等.高光谱技术在农业中的应用研究进展[J].江苏农业科学,2009,(3):8-10
[8]Huang X, Xin J, Zhao J..A novel technique fro rapid evaluation of fish freshness using colorimetric sensor array[J].,2011,105:632-637
[9]Schneider J, Wulf J, Surowsky B, et al.Fluorimetric detection of protoporphyrins as an indicator for quality monitoring of fresh intact pork meat[J].Meat science,2008,80(4):1320-1325
[10]张彦明.无公害动物源食品检验技术[M].北京：中国农业出版社，2003
[11]袁芳，郭培源，吴浩，等.猪肉新鲜度检测方法发展的文献综述[J].中国农业科技导报,2009,11(S1):72-74
[12]王长远，马万龙，姜昱男.猪肉新鲜度的检测及肉质综合评定[J].农产品加工?学刊,2007,10:75-77
[13]顾赛麒，赵勇，谢晶，等.冷却肉新鲜度变化研究[J].食品工业科技,2010,01:102-104
[14]Lawrie,R A. The eating quality of meat. In Meat science (6thed.)[M]. Cambridge: Woodhead Publishing,1998
[15]Estévez M, Morcuende D, Cava R.Oxidative and colour changes in meat from three lines of free-range reared Iberian pigs slaughtered at 90 kg live weight and from industrial pig during refrigerated storage[J].Meat Science,2003,65:1139-1146
[16]Faucitano L, Saucier L, Correa J A, et al.Effect of feed texture, meal frequency and pre-slaughter fasting on carcass and meat quality, and urinary cortisol in pigs[J].Meat Science,2006,74(4):697-703
[17]Moeller S J, Miller R K, Edwards K K, et al.Consumer perceptions of pork eating quality as affected by pork quality attributes and end-point cooked temperature[J].Meat Science,2010,84(1):14-22
[18]Chmiel M, Slowiński M, Dasiweicz K, et al.Lightness of the color measured by computer image analysis as a factor for assessing the quality of pork meat[J].Meat Science,2011,88:566-570
[19]Kannan G, Kouakou B, Galaye S.Colour changes reflecting myoglobin and lipid oxidation in chevon cuts during refrigerated display[J].Small Rumiant Research,2001,42:67-75
[20]O’Sullivan M G, Byrne D V, Stagsted J, et al.Sensory colour assessment of fresh meat from pigs supplemented with iron and vitamin E[J].Meat Science,2002,60:253-265
[21]Zhu L G, Brewer M S.Discoloration of fresh pork as related to muscle and display conditions[J].Journal of Food Science,1998,63:763-767