FCCV标准-Sodium Potassium Tartrate酒石酸钾钠.pdf

430/Sodium Potassium Tartrate Monographs
Lead Determine as directed in the APDC Extraction Method Lead Determine as directed in the Flame Atomic Absorptio
under Lead Limit Test, Appendix IIIB, using a 5-8 sample. Spectrophotometric Method under Lead Limit Test, Appendix
IlIB, using 10-g sample.
Packaging and Storage Store in tightly closed containers Water Determine as directed under Water Determination.
Appendix IIB, using 200 mg of sample and 35 mL of methanol
in the Procedure.
Sodium Potassium Tartrate
Packaging and Storage Store in tight containers.
Potassium Sodium Tartrate; Rochelle Salt; Seignetle Salt
KOOCCH(OH)CH(OH)COONa.4H2O
Sodium Potassium Tripolyphosphate
C4H4KNa06 4H20
Formula wt 282.22 Trisodium Dipotassium Tripolyphosphate
INS: 337
cas:304-59-6a3K2P3O10
Formula wt 400.08
cas:[24315-83-1
DESCRIPTION
Sodium Potassium Tartrate occurs as colorless crystals or as
DESCRIPTION
a white, crystalline powder. As it effloresces slightly in warm,
Sodium Potassium Tripolyphosphate occurs as white, slightly
dry air, the crystals are often coated with white powder. It
hygroscopic granules or as a powder. It is anhydrous. It is
is a salt of ()-tartaric acid. One gram dissolves in 1 mL of freely soluble in water. The ph of a 1: 100 aqueous solution
water. It is practically insoluble in alcohol.
is about 10.
Function Buffer; sequestrant.
Function Texturizer; sequestrant
REQUIREMENTS
REQUIREMENTS
Identification
Identification A 1: 20 aqueous solution gives positive tests
A. Upon ignition, a sample emits the odor of burning sugar for Sodium, or Polassium, and for Phosphate, Appendi IIA
and leaves a residue that is alkaline to litmus and that effer-Na3K2P 3010.
vesces with acids.
. Add 10 mL of acetic acid to 10 mL of a 1:20 aqueous
fluoride Not more than 0.005%.
solution. A white, crystalline precipitate forms within 15 min.
Insoluble Substances Not more than 0.1%.
C. A1: 10 aqueous solution gives positive tests for Tartrate, Lead Not more than 2 mg/kg.
Appendix IIIA.
Assay Not less than 99.0% and not more than 102.0% of
C4H4KNa06 4H20 after drying.
TESTS
Alkalinity Passes test
Determine as directed in the monograph for Sodium Tripoly-
Lead Not more than 2 mg/kg.
phosphate.
Water Between 21.0% and 26.0%.
Packaging and Storage Store in tight containers.
TESTS
Assay Mix 0.5 g of sample, accurately weighed, with 50
mL of glacial acetic acid, 30 mL of 96% formic acid, and 45 Sodium Propionate
mL of acetic anhydride. H
01
nd stir until dissolution is
complete, and titrate with 0.1 N perchloric acid in glacial Sodium Propanoate
mplel
acetic acid to a green end
t with crystal violet indicator.
Caution: Handle perchloric acid in an appropriate
CH3CH2COONa
fume hood.
C3H5NaO2
Formula wt 96.06
Perform a blank determination (see General Provisions), and INS: 281
CaS:[137-40-6]
make any necessary correction. Each milliliter of.I N per-
chloric acid is equivalent to 14.11 mg of C4H4KNa06 4H20
Alkalinity A 1: 20 aqueous solution is alkaline to litmus.
Add 0.2 mL of 0.1 N sulfuric acid to 10 mL of this solution.
DESCRIPTION