Determination of phenylephrine hydrochloride, chlorpheniramine maleate, and methscopolamine nitrate in tablets or capsules by liquid chromatography with two UV absorbance detectors in series.
J AOAC Int
; 89(1): 53-7, 2006.
Article
em En
| MEDLINE
| ID: mdl-16512228
ABSTRACT
A procedure is presented for the simultaneous determination of phenylephrine HCI (PE), chlorpheniramine maleate (CM), and methscopolamine nitrate in commercial tablets or capsules by liquid chromatography (LC) with 2 UV absorbance detectors in series. Reference and sample solutions are prepared in methanol. LC separations are performed on a 7.5 cm Novapak silica column. The mobile phase is prepared by mixing 930 mL methanol with 70 mL of a 0.5% aqueous solution of 1-pentanesulfonic acid, sodium salt. The injection volume is 20 microL; the flow rate is approximately 1 mL/min. Retention times are approximately 1.5 min for PE, 3 min for CM, and 6 min for methscopolamine nitrate. One detector determines the first 2 compounds at 265 nm, but the third compound does not produce a detectable peak. The other detector set at 210 nm generates peaks for all 3 compounds, but only methscopolamine is within the recorder range; the other 2 compounds are exceedingly off scale. If it is not feasible or desirable to arrange 2 UV absorbance detectors in series, separate determinations can be made, one for the first 2 compounds and the other for the third component of the mixture. Two commercial samples of tablets and 2 commercial samples of capsules were analyzed by the proposed method. Recovery studies were also conducted with amounts of the 3 compounds ranging from 80 to 120% of the quantities present in the sample solutions.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Fenilefrina
/
Espectrofotometria
/
Espectrofotometria Ultravioleta
/
Técnicas de Química Analítica
/
Clorfeniramina
/
Cromatografia Líquida
/
N-Metilescopolamina
/
Nitratos
Idioma:
En
Revista:
J AOAC Int
Ano de publicação:
2006
Tipo de documento:
Article
País de afiliação:
Estados Unidos