Printed on: Sun Nov 26 2023, 09:11:35 PM(EST) Status: Currently Official on 27-Nov-2023 DocId: GUID-6A0B7839-AA76-4043-84F4-E09C64C7D423_4_en-US
Printed by: usp qo Official Date: Official as of 01-May-2020 Document Type: NF @2023 USPC
Do Not Distribute DOI Ref: 7fk31 DOI: https://doi.org/10.31003/USPNF_M89255_04_01
1
• REDUCING SUGARS
Xylitol Sample: 500 mg
Analysis: Dissolve the Sample in 2.0 mL of water in a 10-mL
conical flask. Into a similar flask, pipet 2 mL of a 0.5 mg/mL
dextrose solution. To each flask add 1 mL of alkaline cupric
tartrate TS, heat to boiling, and cool.
Acceptance criteria: Any turbidity in the xylitol flask is NMT
that in the dextrose flask, in which a reddish-brown
precipitate forms (0.2% reducing sugars, as dextrose).
• LIMIT OF OTHER POLYOLS
C5H12O5 152.15 Mobile phase: Acetonitrile and water (20:80)
Xylitol. System suitability solution: 0.5 mg/mL each of USP
L-Arabinitol RS, USP Galactitol RS, USP Mannitol RS, and
DEFINITION USP Sorbitol RS, and 100 mg/mL of USP Xylitol RS in Mobile
Xylitol contains NLT 98.5% and NMT 101.0% of C5H12O5, phase
calculated on the anhydrous basis. Standard solution: 0.5 mg/mL each of USP L-Arabinitol RS,
IDENTIFICATION USP Galactitol RS, USP Mannitol RS, and USP Sorbitol RS in
Mobile phase
Change to read: Sample solution: 100 mg/mL of Xylitol in Mobile phase
Chromatographic system
• A. ▲SPECTROSCOPIC IDENTIFICATION TESTS á197ñ, Infrared (See Chromatography á621ñ, System Suitability.)
Spectroscopy: 197K▲ (CN 1-May-2020) Mode: LC
Sample: Undried
al
Detector: UV 192 nm
• B. The retention time of the xylitol peak of the Sample Column: 8.0-mm × 30-cm; 7-µm packing L34
solution corresponds to that of the Standard solution, as Column temperature: 80°
obtained in the Assay. Flow rate: 0.5 mL/min
ASSAY Injection size: 25 µL
System suitability
• PROCEDURE
Mobile phase: Acetonitrile and water (20:80)
System suitability solution: 2.5 mg/mL of USP Galactitol RS
and 25 mg/mL of USP Xylitol RS in Mobile phase
ci Samples: System suitability solution and Standard solution
[NOTE—The relative retention times for L-arabinitol,
mannitol, xylitol, galactitol, and sorbitol are about
Standard solution: 25 mg/mL of USP Xylitol RS in Mobile 0.76, 0.81, 1.0, 1.12, and 1.22, respectively.]
phase Suitability requirements
ffi
Sample solution: 25 mg/mL of Xylitol in Mobile phase Resolution: NLT 1.5 between all adjacent polyol peaks,
System suitability solution
Chromatographic system
(See Chromatography á621ñ, System Suitability.) Relative standard deviation: NMT 5.0% for the
Mode: LC galactitol peak, Standard solution
Analysis
Detector: UV 192 nm
Samples: Standard solution and Sample solution
Column: 8.0-mm × 30-cm; 7-µm packing L34
O
Calculate the percentage of each polyol (L-arabinitol,
Column temperature: 80°
galactitol, mannitol, or sorbitol) in the portion of sample
Flow rate: 0.5 mL/min
taken:
Injection size: 25 µL
System suitability Result = (r U/r S) × (C S/C U) × 100
Sample: System suitability solution and Standard solution
[NOTE—The relative retention times for xylitol and rU = peak response of the individual polyol from the
galactitol are about 1.0 and 1.10, respectively.] Sample solution
Suitability requirements rS = peak response of the individual polyol from the
Resolution: NLT 2.0 between galactitol and xylitol, Standard solution
System suitability solution CS = concentration of the individual polyol in the
Relative standard deviation: NMT 2.0%, Standard Standard solution (mg/mL)
solution CU = concentration of the Sample solution (mg/mL)
Analysis
Samples: Standard solution and Sample solution Acceptance criteria: The sum of the polyols is NMT 2.0%,
Calculate the percentage of xylitol (C5H12O5) in the portion calculated on the anhydrous basis.
of sample taken:
SPECIFIC TESTS
Result = (r U/r S) × (C S/C U) × 100 • WATER DETERMINATION, Method I á921ñ: NMT 0.5%
rU = peak response of xylitol from the Sample solution ADDITIONAL REQUIREMENTS
rs = peak response of xylitol from the Standard solution • PACKAGING AND STORAGE: Preserve in well-closed
containers.
CS = concentration of USP Xylitol RS in the Standard • USP REFERENCE STANDARDS á11ñ
solution (mg/mL) USP L-Arabinitol RS
CU = concentration of the Sample solution (mg/mL) USP Galactitol RS
USP Mannitol RS
Acceptance criteria: 98.5%–101.0% on the anhydrous USP Sorbitol RS
basis USP Xylitol RS
IMPURITIES
• RESIDUE ON IGNITION á281ñ: NMT 0.5%
https://online.uspnf.com/uspnf/document/1_GUID-6A0B7839-AA76-4043-84F4-E09C64C7D423_4_en-US 1/1
