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Food additives data book - wordpres

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Polysaccharides 712<br />

NAME: Locust bean gum<br />

CATEGORY: Polysaccharides<br />

FOOD USE: Dairy products/ Pet foods/ Baked goods/ Confectionery/ Dry formulated products/ <strong>Food</strong> packaging/<br />

Edible films and coatings/ All food products<br />

SYNONYMS: Beta-D-(1 Æ 4) mannan with some attached D-galactose molecules linked via alpha (1 Æ 6) bonds/<br />

CAS 9000-40-2/ EINECS 232-541-5/ E410/ Galactomannan/ Carob flour/ Carob bean gum/<br />

St John’s bread/ Algoroba<br />

FORMULA: Variable, depending on the ratio of galactose to mannose<br />

MOLECULAR MASS: Variable. Generally 300,000 to 360,000<br />

PROPERTIES AND APPEARANCE: White/brown powder<br />

SOLUBILITY % AT VARIOUS Solubility varies with molecular weight. Generally, locust bean gum is soluble in water, sucrose<br />

TEMPERATURE/pH COMBINATIONS: solutions and sodium chloride solution, but solubility in ethanol, vegetable oils and propylene glycol is<br />

limited.<br />

Solubility declines with increasing molecular weight and increasing concentration. It is pHindependent<br />

(pH 4 to pH 8)<br />

FUNCTION IN FOODS: Thickening agent; stabiliser; bulking agent; suspending agent<br />

ALTERNATIVES: Guar gum; tara gum; carrageenans; dextrans; starches; xanthan; gelatin; agar; alginate (applicationdependent)<br />

TECHNOLOGY OF USE IN FOODS: Locust bean gum should be dispersed in cold water and heated to 80°C for 10 minutes to hydrate the<br />

polysaccharide. A high shear mixer will aid dispersion, although prolonged shear of high molecularweight<br />

polymers will reduce the viscosity.<br />

Locust bean gum molecules have a high hydrodynamic volume and can entangle with adjacent<br />

molecules, resulting in viscous properties. Synergistic interactions with xanthan gum result in gel

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