Quality Characteristics of Syrup made with Saccharified Barley Liquid

보리당화액을 첨가한 시럽의 제조와 품질특성

  • Kim, Ji-Hyun (Dept. of Food and Nutrition, Kwangju Women's University) ;
  • Cho, Eun-Ju (Dept. of Food and Nutrition, Graduate School, Chonnam National University)
  • 김지현 (광주여자대학교 식품영양학과) ;
  • 조은주 (전남대학교 대학원 식품영양학과)
  • Received : 2015.10.28
  • Accepted : 2015.12.05
  • Published : 2015.12.31

Abstract

Barley is a main food source, along with rice, in our dietary life that is easy to buy and process. It is required to develop a beverage base and barley syrup for desserts in order to raise utilization of barley beyond its present use in Sikhye (sweet fermented rice drink) and Jocheong (grain syrup) production. In pursuit of the goal to increase the usability of barley as an ingredient of processed food, this study examined the optimal preparation conditions of barley mash for barley syrup. In addition, the study prepared a barley syrup using saccharified barley liquid, analyzed quality characteristics, and conducted a sensory evaluation. Saccharified barley liquid(barley mash) was prepared with ratios of adding malt of unhulled barley germinated as 0 g(CON), 10 g(BM10), 20 g(BM20), and 30 g(BM30). The results of measuring pH under the varied conditions of saccharification temperatures from $50^{\circ}C$, $60^{\circ}C$, and $70^{\circ}C$, as well as time from 1 to 8 hours, treveal that the optimum condition for malt saccharification is $60^{\circ}C$ for 5 hours. By adding oligosaccharides and lemon juice to the saccharified barley liquid at the different ratios of added malt, this study measured quality characteristics(color value, viscosity, pH, sweetness) of barley syrup warmed up for 1 hour. As the result of measuring color in the barley syrup prepared by saccharified barley liquid, higher levels of added malt saw L-value decreased while a-value and b-value both increased. BMs30 showed the highest viscosity of $1,202.67{\pm}3.06$. As for pH, BMs30 was the highest at pH $3.57{\pm}0.02$. The result of the sensory evaluation of barley syrup showed the superior sensory characteristics of BMs20 in terms of color, flavor, sweetness, viscosity and overall quality.

본 연구는 가공식품 원료로서 보리의 이용 가능성을 높이고자 보리시럽 제조에 필요한 보리당화액 제조의 최적조건을 규명하고, 보리당화액을 첨가한 보리시럽을 제조하여 품질특성 분석 및 관능평가를 실시하였다. 겉보리를 발아시킨 엿기름 첨가량을 10%(BM10), 20%(BM20), 30%(BM30)로 하고, 찰보리와 혼합하여 보리당화액을 제조하고, 당화온도는 $50^{\circ}C$, $60^{\circ}C$, $70^{\circ}C$, 당화시간을 1~8시간으로 조건을 달리하여 엿기름 당화의 제조조건을 규명하고자 엿기름물의 시간대별 pH 변화와 당도를 시간대별로 측정한 결과는 $60^{\circ}C$에서 5시간이 적합하였다. 엿기름의 첨가량을 달리하여 $60^{\circ}C$에서 5시간 당화시킨 보리당화액 BM10, BM20, BM30에 올리고당과 레몬액을 각각 첨가하고, $65^{\circ}C$에서 1시간 동안 중탕 제조한 보리시럽의 품질특성을 측정하였다. 당도는 BMs30의 당도가 가장 높게 나타났다. 색도를 측정한 L값은 엿기름 첨가량이 많은 보리당화액으로 제조한 보리시럽일수록 감소하였고, a값과 b값은 엿기름 첨가량이 증가할수록 증가하여 BMs30이 가장 높게 나타났다. 보리시럽의 점도와 pH를 측정한 결과는 엿기름 첨가량이 증가할수록 증가하여 BMs30이 가장 높게 나타났다. 보리시럽의 관능평가 결과, 색, 향, 당도, 점도, 전반적인 기호도에서 보리에 대한 고정관념과 보리시럽을 기대하고 예상하는 맛이 있어 모든 평가 항목에서 BM20으로 제조한 보리시럽 BMs20이 관능적 특성이 우수한 것으로 평가되어 엿기름 첨가량 20%(BM20)를 첨가하여 $60^{\circ}C$에서 5시간 동안 당화한 최적의 보리당화액으로, $65^{\circ}C$에서 1시간 동안 중탕하여 제조한 당도 $60^{\circ}Brix$ BMs20이 음료베이스용 시럽 및 디저트용 시럽으로 사용하기에 가장 적합할 것으로 판단되며, 보리 및 보리가공품 실용화를 위한 기초자료로 활용될 수 있을 것으로 사료된다.

Keywords

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