Qualitative Characteristics and Determining Shelf- Life of Milk Beverage Product Supplemented with Coffee Extracts

• 발행기관: 한국축산식품학회
• 저자명: Ji-woo Yoon Sung-il Ahn Ha-na Kim Jun-hong Park Sun-young Park Jae-hoon Kim Duk-geun Oh Jin-woo Jhoo
• 간행물 정보: 『Food Science of Animal Resources』Korean Journal for Food Science of Animal Resources 제37권 제2호, 305~312쪽, 전체 8쪽
• 주제분류: 농수해양 > 식품과학
• 파일형태: PDF
• 발행일자: 2017.04.30

영문 초록

This study was conducted to establish the shelf-life of a milk beverage product supplemented with coffee extracts. Qualitative changes including peroxide value (PV), microorganism content, caffeine content, and sensory evaluation were measured periodically in beverages kept at 10, 20, and 30℃ for 8 wk. Lipid oxidation of the product was measured by peroxide value analysis, and apparent changes were observed during a 4 wk storage period. Caffeine analysis revealed that the changes in caffeine content were negligible during the storage period. Total aerobic bacteria, Escherichia coli, yeast, and mold were not detected in the products during an 8 wk storage period. Sensory evaluation revealed that after 4 wk of storage overall acceptance was less than 3 points on a 5-point scale. In this study, PV was used as an indicator of the shelflife of the milk beverage product. PV analysis revealed that a value of 20 meq/kg was the end of the shelf-life using the Arrhenius equation and the accelerated shelf-life test (ASLT). Assuming that the beverages are kept at 4℃ during distribution, calculation of when the PV reached the quality limit point (20 meq/kg) was done with the equation ln(PV) = 0.3644X - 2.21834 and, using that equation, PV = e0.3644X-2.21834 was calculated. Therefore, 14.3086 wk was determined to be the shelf-life of the milk beverage supplemented with coffee when stored at 4℃.

키워드

milk beverage coffee peroxide value shelf-life Arrhenius equation