Gum Arabic / Gum Acacia - Hobby Takt Ltd

C.E. Roeper GmbHHans - Duncker - Str. 13D - 21035 Hamburg

E-Mail office@roeper.deInternet www.roeper.de Nature is not replaceable...

Gum Arabic / Gum Acacia

The dried exudate (gum) fromAcacia Senegal and related

species (Acacia Seyal)

Gum Arabic�Origin�Collection (origin) and Processing (Europe)�Structure

– chemical composition�Properties

– functional characteristics and influences�Applications� Important Quality Parameters�Comparison of the different grades�Our qualities

Gum Arabic - OriginSouth of Sahel zone,mainly Sudan, Chad

and Nigeria

Gum Arabic - Collection

Tapping

Cleaning

Sieving

Gum Arabic - Processing

�Dry– powder– granular

�Wet– spraydrying– rollerdrying

Gum Arabic - Structure�Complex polysaccharide

– neutral or weakly acid

– containing nitrogenous material (amino acids)

– chemical composition vary slightly

– contained sugar monomers in a ratio of 3:3:1:1 are• galactose, arabinose, rhamnose and glucoronic acid

– highly branched molecule with great variation inmolecular mass

Gum Arabic - Structure

Gum Arabic - Properties

� readily dissolves incold water

� odourless� tasteless� viscosity is a function

of concentration

Gum Arabic - Properties�Solutions of Gum Arabic below 40 %

– react like Newtonian liquid• viscosity is shear rate independent

�Solutions of Gum Arabic at higher concentrations– show pseudoplastic characteristics

• shear thinnig

⇒⇒⇒⇒ reversible decrease of viscosity with increasing shear forces

�weakly acidcharacter in water(pH ≈ 4.5)

� pH of the solutionaffects the viscosity

� viscosity decreasesin the presence ofelectrolytes (salts)

Gum Arabic - Properties� comparison with

other thickeningagents shows lowerviscosity of GumArabic solutionseven at higherconcentrations

Gum Arabic - Properties�emulsifier for essential oils and flavours

– proteins adsorb on the surface of the oil droplets

– formed emulsions remain stable for a long periodof time

Disadvantage:prolonged heating ( > 70 °C) of Gum Arabic solutionscauses precipitation of the proteinous components !!!

Gum Arabic - Applications

�Food industry– Confectionery

• gums, especially wine gums (thickener)

• pastilles (thickener)

• marshmallows (foam stabiliser)

• toffees (emulsifier)

• glaze on coated nuts or similar products

Gum Arabic - Applications

�Food industry– Beverages

• emulsifier in production of citrus and cola flavouroils for soft drinks

– Diary Products• stabiliser in frozen products like ice and ice cream

– water absorbing, producing a finer texture

Gum Arabic - Applications�Food industry

– Bakery products• glazes and toppings

– Diabetic and dietetic products• low level of metabolism

– Flavour fixative• spray dried encapsulation

Gum Arabic - Applications�Pharmaceutical industry

• stabiliser in emulsions

• binder in tablets

• mucilage for tablet coatings

�Cosmetic industry• smooth feel in lotions and protective creams

• adhesive in facial masks or face powders

Gum Arabic - Applications�Other industries

• mucilage

• simple adhesive and glue

• protective colloid and suspending agent in Inks

Gum Arabic -Important Quality Parameters

� Purity� Colour� Optical rotation� Emulsifying properties� Microbiological values

Gum Arabic -Comparison of the different grades

�Powder /granular form– price– solubility (compared

to crude gum)

�Spraydried /rollerdried form– purity– homogenous– microbiology– solubility

Gum Arabic - Our Qualities

�CEROGA 821 Kordofan cleaned�CEROGA 812 cleaned ex Acacia Senegal�CEROGA 803 small lumps ex Acacia Seyal�CEROGA 800 technical

LUMPSLUMPS

�CEROGA 836 very fine white�CEROGA 834 light white�CEROGA 831 off-white�CEROGA 830 technical dark

POWDERPOWDER

�CEROSPRAY K / Gum Arabic spraydried white�CEROSPRAY N / Gum Arabic spraydried light�CEROSPRAY B / Gum Arabic spraydried yellowish�CEROSPRAY F / Gum Arabic spraydried off-white�CEROSPRAY D / Gum Arabic spraydried dark

SPRAYDRIEDSPRAYDRIED

Gum Arabic spraydried

Dissolution of the gumin water, extraction ofimpurities

Elimination ofimpurities through

centrifugation

Concentration andPasteurisation

Spray Tower

Gum Arabic / Gum Acacia - Hobby Takt Ltd

Documents

Transcript of Gum Arabic / Gum Acacia - Hobby Takt Ltd

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