Safety evaluation of certain food additives
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EXPLANATION At the request of the Codex Committee on Food Additives at its fortieth session (FAO/WHO, 2008), the Committee evaluated cassia gum, which it had not evaluated previously. Cassia gum is related to guar gum, locust (carob) bean gum and tara gum in terms of structure and chemical properties. The galactomannans of guar gum, locust (carob) bean gum and tara gum have mannose to galactose ratios of 2:1, 4:1 and approximately 3:1, respectively. Each of these three gums was previously allocated an acceptable daily intake (ADI) “not specified” (Annex 1, references 39, 57 and 74). 1.1 Chemical and technical considerations Cassia gum is the purified flour from the endosperm of the seeds of Cassia tora and Cassia obtusifolia, which belong to the Leguminosae family. Cassia gum is composed of at least 75% high relative molecular mass (approximately 11 11 12 12 12 12 13 15 15 18 20 20 20 21 23 23 24 25 25 - 11 - 200 000–300 000) polysaccharide, consisting primarily of a linear chain of 1,4- ȕ-D- mannopyranose units with 1,6-linked Į-D-galactopyranose units. The saccharides are composed of mannose (77.2–78.9%), galactose (15.7–14.7%) and glucose (7.1–6.3%). The ratio of mannose to galactose is 5:1. The manufacture of cassia gum includes cleaning of the source material, by which the content of Cassia occidentalis (which is a naturally occurring contaminant) is reduced to less than 0.05%, de-husking and de-germing by thermal mechanical treatment, followed by milling and screening of the endosperm. The ground endosperm is further purified by extraction with isopropanol. The concentration of anthraquinones in cassia gum is below the 0.5 mg/kg detection limit. The food additive under evaluation is cassia gum that is refined and complies with the specifications established at the current meeting. Cassia gum is used as a thickener, emulsifier, foam stabilizer, moisture retention agent and/or texturizing agent in processed cheese, frozen dairy desserts and mixes, meat products and poultry products. tải về 1.44 Mb. Chia sẻ với bạn bè của bạn:
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