Effects of Sodium Metabisulfite and Adipic Acid on Browning of Garlic Juice Concentrate during Storage

Sodium metabisulfite와 adipic acid가 마늘 농축액의 저장 중 갈변현상에 미치는 영향

  • Published : 2002.02.01

Abstract

The effect of sodium metabisulfite and adipic acid on the color changes of garlic juice was evaluated. The garlic(Uisung variety) juice was extracted and 1% sodium metabisulfite and 1% adipic arid were added to the garlic juice before or after concentration. Garlic juice was concentrated by heating at 90$\^{C}$, by heating using a rotary vacuum evaporator at 45$\^{C}$, or by freeze-drying at -50$\^{C}$ until the volume was reduced to 70% of the original volume. The garlic juice concentrate was kept at 4$\^{C}$ and 25$\^{C}$ for 60 days and evaluated for the color change and the relation between the additives and browning. Browning of the garlic juice concentrate containing adipic acid and sodium metabisulfite was effectively inhibited compared with the control. Inhibition effect of sodium metabisulfite on the browning of the concentrate was stronger than that of adipic acid. The addition of sodium metabisulfite afrer concentration of garlic juice was the most effective on browning inhibition in the 9$\^{C}$-heated concentrate, but the addition of sodium metabisulfite before concentration was the most effective in the 45$\^{C}$-heated concentrate and the -50$\^{C}$-freeze-dried concentrate. In the color change of the garlic juice concentrate during the storage, a and b values of the concentrate with sodium metabisulfite were lower than those of the control, which means that sodium metabisulfite inhibited the browning of the garlic juice concentrate.

마늘즙을 9$0^{\circ}C$에서 가열, 45$^{\circ}C$에서 감압 가열, -5$0^{\circ}C$에서 동결 농축하여 마늘 농축액을 제조하였고 이 때 농축 전후로 1% adipic acid와 1% sodium metabisulfite를 첨가하였다. 제조된 마늘 농축액을 4$^{\circ}C$$25^{\circ}C$에서 60일간 저장하면서 이들의 갈변도및 색도 변화를 측정한 결과, 전체적으로 adipic acid나 sodium metabisulfite가 첨가된 마늘 농축액이 무첨가 마늘 농축액에 비해 갈변이 억제되었으며 adipic acid 보다는 sodium metabisulfite를 첨가한 농축액에서 갈변억제 효과가 크게 나타났다. 첨가물의 첨가시기에 따른 효과를 보면 9$0^{\circ}C$ 가열 농축액에서는 농축 후에 sodium metabisulfite를 첨가한 것이 가장 갈변이 억제되었으며, 45$^{\circ}C$에서 감압 가열 농축액과 -5$0^{\circ}C$ 동결농축액에서는 농축 전에 sodium metabisulfite를 첨가한 농축액에서 갈변억제 효과가 크게 나타났다. 한편 -5$0^{\circ}C$ 동결농축액은 저장동안 무첨가액의 갈변이 크게 증가함으로써 갈변억제제의 사용이 필요한 것으로 나타났다. 9$0^{\circ}C$ 가열 마늘 농축액의 저장 중 색도 변화에서는 sodium metabisulfite를 첨가한 농축액의 L값이 adipic acid 첨가액보다 높고 a값과 b값은 낮아 갈변이 억제되었음을 알 수 있었다. 45$^{\circ}C$에서 감압 가열 농축액과 -5$0^{\circ}C$ 동결농축액에서도 sodium metabisulfite를 첨가한 농축액의 a값과 b값이 adipic acid를 첨가한 농축액보다 낮아 갈변억제에 sodium metabisulfite의 효과가 더 큰 것으로 나타났다.

Keywords

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