Chemistry Reference
In-Depth Information
table 7.3 Speciications of p
lum Juice Concentrate
Dried plum (prune) juice
Description
: Canned or bottled dried plum (prune) juice. Contains not less
than 18.5% by the weight of water-soluble dried plum solids.
Moisture Range
: 18.5% min.
Packaging
: Glass:12/16 oz, 12/32 oz, 12/40 oz Tins: 4/6/5-1/2 oz, 6/48 oz,
8/6/5-1/2 oz, 24/12 oz, 12/46 oz, 6/No. 10.
Product Use
: Beverages
Dried plum (prune) juice
concentrate
Description
: Viscous form of dried plum juice. No preservatives added.
Moisture Range
: 70°Bx
Acidity as citric acid
: 6.7 ± 1.7
pH
: 2.8-4.0
Speciic gravity
:
1.327-1.356
Packaging
: Steel drums, polyethylene pails.
Product Use
: Mold inhibitor in baked goods. Retains moisture in precooked
meats. Can be injected into whole muscle meats. Inhibitor of food-borne
pathogens/oxidation.
Flavor
: Full lavored and typical of ine-quality plum juice concentrate. Free
from scorched, fermented, caramelized, or other undesirable lavor
Shelf life
: Refrigerated or frozen for approximately 2 years
Fresh plum juice concentrate
Description
: Concentrate made from juice from mature fresh plums.
Moisture Range
: 70°Bx
Packaging
: Steel drums, polyethylene pails
Product Use
: Bakery products, syrups/toppings juice blends, meat/poultry
sauces/marinades, snack foods/energy bars. Can be injected into whole
muscle meats. Inhibitor of food-borne pathogens/oxidation.
Source:
http://www.californiadriedplums.org/industrial/products/juice-concentrate
, October 2011.
7.4 appLe JUICe CONCeNtrate
Applejuiceconcentrateisanaturalsweetener.Currently,itismainlyusedasajuice,andwe
will focus on its production, as described in Figure 7.5. In supermarkets, frozen fruit juices are
dilutedataratioof1:3withwaterandconsumedasfreshjuices.
7.4.1 Fruit Juices
Fruitjuicesareclassiiedintothreemaincategories:
•
Naturaljuices,whicharejuicesextractedfromfruitswhereacertainpercentageofapproximately
1.5%sweetenersisadded(suchassugar,sorbitol,andfructose).
•
Concentratedjuicesfromnaturaljuices,inwhichasweetenerisaddedaccordingtoaconcentration
degree.
•
Nectarfruitjuices,whicharejuicesfromfruitsthickenedwiththeadditionofsweeteners.
Fruitjuicesconstituteaverygoodsourceofnutrients,becausetheycontainvitamins,inorganic
compounds,andmicronutrients,whereastheyhavealowpercentageoffat.However,juiceshavean
increasednutritionalcontentincaseswheresweetenershavebeenadded.
FruitjuicesarethemostancientdrinksthatcontainsugarsandwereusedbyancientGreeks
becausetheirgodsrequiredthemtoconsumeambrosiaanddrinknectar,whichwasformedbyfruit
juicesmixedwithhoneyandpollen.
Fruitprocessingtomakejuicesstartedwithappleproductionattheendofthenineteenthcen-
tury in Switzerland. Technological progress in recent decades has made a great number of good
qualityfruitjuices.
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