FCCV标准-Sodium Ascorbate抗坏血酸钠.pdf

404/ Sodium Ascorbate/ Monographs
FCCV
aluminum phosphate [approximately NagAl2(OH)PO4)] Sodium Ascorbate
with about 30% dibasic sodium phosphate. It is soluble in
hydrochloric acid; the sodium phosphate moiety is soluble in
Vitamin C Sodium; Sodium 1-Ascorbate
water, whereas the sodium aluminum phosphate moiety is
only sparingly soluble in water
ONa OH
OH
Function Emulsilier.
HOCH2C
REQUIREMENTS
H
Identification A1: 10 solution in 1: 2 hydrochloric acid gives C6HyNaO6
Formula wt 198.11
positive tests for Aluminum and for Phosphate, Appendix IIIA
and it responds to the flame test for Sodium, Appendix IIIA. INS: 301
Assay Not less than 9.5% and not more than 12.5% of
cas:[134-03-2]
Al2O3, calculated on the ignited basis.
Arsenic Not more than 3 mg/kg.
Fluoride Not more than 0.0025%
DESCRIPTION
Lead Not more than 2 mg/kg.
Loss on Ignition Not more than 9.0%.
Sodium Ascorbate occurs as a white to yellow, crystalline
powder that does not darken on exposure to light. One gram
is soluble in 2 mL of water. The pH of a 1: 10 aqueous solution
TESTS
is about 7.5.
Assay Transfer about 2.5 g of sample, accurately weighed,
into a 400-mL beaker, add 15 mL of hydrochloric acid and
Function Antioxidant; meat curing aid; nutrient.
one glass bead, cover with a watch glass, and boil gently for
about 5 min. Rinse any condensate on the watch glass into REQUIREMENTS
the beaker, cool the
on to room temperature, transfer it Identification
quantitatively to a 250-m
sk, dilute to volume. A 1:50 aqueous solution slowly reduces alkaline cupric
with water, and mix thor
ransfer 10.0 m of this tartrate TS at 25, and does so more readily upon heating
B. Add 4 drops of methylene blue TS to 2 mL of a 1:50
ydrochlo-aqueous solution acidified with 0.5 mL of 0.1 N hydrochloric
0100 acid, and warm to
4
0°The
deep blue color disappears almost
of completely within 3 min.
C. Dissolve 15 mg of sample in 15 mL of a 1: 20 trichloro-
excess. acetic acid: water solution, add about 200 mg of activated
charcoal, shake vigorously for 1 min, and filter through a
small fluted filter, returning the filtrate, if necessary, until
clear. Add I drop of pyrrole to 5 mL of the filtrate, agitate
0.111 mg of Al2
corresponds to gently until dissolved, and then heat in a water bath at 50.
A blue color appears.
Appendix IIB, using a solution of I g sample in 10 mL Assay Not less than 99.0% and not more than 101.0% of
Fluoride Determine as directed und
Fluoride Limit Test,
6HNao6 aer arying,
Appendix IIB, using 2.0 g of sample, accurately weighed.
Loss on Drying Not more than 0.25%.
Lead Determit Te st recled in the APDC Exiraction Method Optical (Specific) Rotation [al: Between +103 and
under Lead Limit Test, Appendix IIIB
+108°
Loss on Ignition Ignite at 750 to 800 for 2 h.
Packaging and Storage Store in tightly closed containers.
TESTS
Assay Dissolve about 400 mg of sample, previously dried
over phosphorus pentoxide for 24 h and accurately weighed,
in a mixture of 100 mL of water, recently boiled and cooled,
and 25 mL of N sulfuric acid, and titrate with 0.1 Niodine.
add