FCCV标准-Sodium Tartrate酒石酸钠.pdf

438/ Sodium Tartrate Monographs
CC V
litmus and to phenolphthalein. One gram dissolves in about Assay Nol less than.0% and nol more than 100.5% o
4 ML of water. It is sparingly soluble in alcohol
C4H4NA2OS after drying
Lead Not more than 2 m/k
unction Preservative; antioxidant; bleaching agent
, oss on Drying Between 14.0% and 17.0%
Oxalate Passes test(limit about 0.1%
REQUIREMIENTS
INESITS
Identification A 1: 20 aqueous solution gives positive tests
for Sodium and for Sulfite, Appendix ITTA
Assay Transler about 250 mg o! sample, previously dried
Assay Not less than 95.0% of Na2 s0
at 150@ for 3 h and accurately weighed, to a 250-ML beaker.
Lead Nol more than 2 mg/kg
Add 150 ML of glacial acetic acid heat to near boiling
Selenium Not more than 0.0030
stir ( preferably with a magnetic stirrer)until the sample is
dissolved, and cool to room temperature. Titrate with 0.1 N
TESTS
perchloric acid in glacial acetic acid, determining the endpoint
potentiometrically
Assay Add about 250 mg of sample, accurately weighed,
Caution: Handle perchloric acid in an appropriate
to exactly 50 ml of 0. I Iodine contained in a glass-stoppered
fume hood
flask, and stopper the flask. Allow to stand for 5 min, add 1
ML of hydrochloric acid, and titrate the excess lodine with
Each milliliter of 0. I N perchloric acid is equivalent to 9.703
0I N sodium thiosulfate, adding starch TS as the indicator. mg of C4HANA20
Each milliliter of 0.1 N iodine is equivalent to 6.302 mg of
ead Determine as directed in the Flame Atomic Absorption
Na2s03
Spectrophotometric Method under / ead Limit yest, Appendi
Lead Determine as directed in the APDC Ex(raction Method IB, using a 10-g sample
under Lead Limit fest, Appendix IIB
oss on Drying Determine as directed under Loss on Dn
Selenium Determine as directed in Melhod /under Selenium ing, Appendix IIC, drying a sample at 150 for 3 h
Limit Test, Appendix ILB, using 200 mg of sample and 100
Oxalate Dissolve 1 of sample in 10 ML of water and
mg of magnesium oxide
add 5 drops of I N acetic acid and 2 ML of calcium chloride
TS. No turbidity develops within 1 h
Packaging and Storage Store In tight containers
Packaging and Storage Store in tight containers
Sodium Tartrate
Sodium Thiosulfate
Disodium Tartrate: Disodium L-tartrate
Sodium Hyposullite
NAOOCCH(OH)CH(OH)COONA 2H20
Na2$203 ' 5H2O
Formula wl 248. 19
CAHANA2 H2O
Formula wl 23008
INS: 539
CAS:「10102-17-7
INS: 335
CAS:1868-18-」
DESCRIPTION
DESCRIPTION
Sodium Thiosullate occurs as large, colorless crystals or as
a coarse, crystalline powder. It is deliquescent in moist air
Sodium Tartrate occurs as transparent, colorless crystals. It and effloresces in dry air at a temperature above 33. Its
is the disodium salt of I()-lartaric acid. One gram dissolves solutions are neutral or faintly alkaline to litmus. One gram
n 3 ML of water. It is insoluble in alcohol. The PH of a 1: 20 dissolves in 0.5 ml of water. It is insoluble in alcohol
ueous solution is between 7 and 9. Upon igmition. it emits
the odor of burning sugar and leaves a residue that is alkaline Function Sequestrant; antioxidant
to litmus and that effervesces with acids
lfunction Se