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KMID : 1007520070160061069
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Food Science and Biotechnology
2007 Volume.16 No. 6 p.1069 ~ p.1071
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Determination of Frequency Independent Critical Concentration of Xathan and Carob Mixed Gels
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Yoon Won-Byong
Gunasekaran Sundaram
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Abstract
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The frequency independent critical concentration (Cc) of xanthan and carob (X/C) mixed gel was determined based on the Winter-Chambon`s theory. X/C mixed (X/C=1:1 ratio) gels were prepared from 0.1 to 1% of concentration. The linear viscoelastic properties, i.e., storage and loss modulus, of X/C mixed gel at 20℃ were measured by frequency sweep tests. The frequency independence of tangent function of phase angle (tan δ) of X/C mixed gels was graphically determined from the intersection of the plot of phase angle against concentration at varied frequencies. The intersection (C=0.43%) was considered to be Cc of X/C mixed gel.
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KEYWORD
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Winter-Chambon`s theory, critical concentration, rheology, xanthan gum, Locust bean gum
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