Glucono-delta-Lactone

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China Mainland
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Description

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Details:

Glucono delta-lactone (GDL) is a naturally occurring food additive with the E number E575 used as a sequestrant, an acidifier, or a curing, pickling, or leavening agent. It is a lactone (cyclic ester) of D-gluconic acid. Pure GDL is a white odorless crystalline powder.

GDL is commonly found in honey, fruit juices, personal lubricants, and wine[citation needed]. GDL is neutral, but hydrolyses in water to gluconic acid which is acidic, adding a tangy taste to foods, though it has roughly a third of the sourness of citric acid. It is metabolized to glucose; one gram of GDL yields roughly the same amount of metabolic energy as one gram of sugar.

Upon addition to water, GDL is partially hydrolysed to gluconic acid, with the balance beTween the lactone form and the acid form established as a chemical equilibrium. The rate of hydrolysis of GDL is increased by heat and high pH.

The yeast Saccharomyces bulderi can be used to ferment gluconolactone to ethanol and carbon dioxide. The pH value greatly affects culture growth. Gluconolactone at 1 or 2% in a mineral media solution causes the pH to drop below 3.

Application:

(1) Producing glucose acid in hydrolysis and curdling protein, which make more effect than calcium sulfate, calcium chloride and bittern. Tofu, made with Glucono delta-lactone, has great water retention, fine texture, smooth and delicious taste, and has antiseptic effect.

(2) As a preservative, it has antiseptic effect to mold and bacteria , can be used for meat, poultry, fish, shrimp, antisepsis, make product outward appearance luster, Browning, and can keep the flesh elasticity.

(3) As a leavening agent, this product can product ferment powder mixed with sodium bicarbonate. Heating of glucose acid react with sodium bicarbonate and produce carbon dioxide to achieve good bulk effect without peculiar smell. Especially suitable for used in cakes, fried food, etc.

ITEM	STANDARD
IDENTIFICATION	POSITIVE
GDL	99-100.5%
CHARACTERISTICS	WHITE CRYSTALLINE POWDER, ALMOST ODORLESS
SOLUBILITY	EASILY SOLUBLE IN WATER, HARD SOLUBLE IN ETHANOL
MELTING POINT	152?±2
MOISTURE	=0.5%
REDUCING SUBSTANCES (AS D-GLUCOSE)	=0.5%
AS	=1PPM
HEAVY METAL	=10PPM
LEAD	=2PPM
MERCURY	=0.1PPM
CADMIUM	=2PPM
CALCIUM	=0.05%
CHLORIDE	=0.05%
SULPHATES	=0.02%
LOSS ON DRYING	=1%
PH	1.5~1.8
AEROBE	50/G MAX
YEAST	10/G MAX
MOLD	10/G MAX
E.COLI	NOT AVAILABLE AT 30G
SALMONELLA	NOT AVAILABLE AT 25G