Development and application of a validated HPLC method for the analysis of dissolution samples of levothyroxine sodium drug products.
J Pharm Biomed Anal
; 54(3): 433-8, 2011 Feb 20.
Article
in En
| MEDLINE
| ID: mdl-20947276
ABSTRACT
A rapid, selective, and sensitive gradient HPLC method was developed for the analysis of dissolution samples of levothyroxine sodium tablets. Current USP methodology for levothyroxine (L-T(4)) was not adequate to resolve co-elutants from a variety of levothyroxine drug product formulations. The USP method for analyzing dissolution samples of the drug product has shown significant intra- and inter-day variability. The sources of method variability include chromatographic interferences introduced by the dissolution media and the formulation excipients. In the present work, chromatographic separation of levothyroxine was achieved on an Agilent 1100 Series HPLC with a Waters Nova-pak column (250 mm × 3.9 mm) using a 0.01 M phosphate buffer (pH 3.0)-methanol (5545, v/v) in a gradient elution mobile phase at a flow rate of 1.0 mL/min and detection UV wavelength of 225 nm. The injection volume was 800 µL and the column temperature was maintained at 28°C. The method was validated according to USP Category I requirements. The validation characteristics included accuracy, precision, specificity, linearity, and analytical range. The standard curve was found to have a linear relationship (r(2)>0.99) over the analytical range of 0.08-0.8 µg/mL. Accuracy ranged from 90 to 110% for low quality control (QC) standards and 95 to 105% for medium and high QC standards. Precision was <2% at all QC levels. The method was found to be accurate, precise, selective, and linear for L-T(4) over the analytical range. The HPLC method was successfully applied to the analysis of dissolution samples of marketed levothyroxine sodium tablets.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Thyroid Hormones
/
Thyroxine
/
Excipients
Type of study:
Diagnostic_studies
Limits:
Humans
Language:
En
Journal:
J Pharm Biomed Anal
Year:
2011
Document type:
Article
Affiliation country:
United States