Simultaneous LC determination of tizanidine and rofecoxib in tablets.

Abstract:

:A reverse phase high performance liquid chromatographic method to determine tizanidine (TZ) and rofecoxib (RF) in combination is proposed and applied to the pharmaceuticals. This method allows the determination of 0.1-0.5 microg/ml of TZ and 1.2-6.0 microg/ml of RF along with 10 microg/ml of nimesulide (internal standard), in a mobile phase consisting of 1% (v/v) triethylamine (pH adjusted to 2.5 using dilute orthophosphoric acid):acetonitrile in the ratio 55:45% (v/v). Detection wavelength of 303 nm and flow rate of 0.8 ml/min were fixed for the study. The limit of detection (LOD) for TZ and RF were found to be 10 and 1 ng/ml, respectively. The limit of quantification (LOQ) for TZ and RF were found to be 80 and 12 ng/ml, respectively. The amount of drug present in the tablet and the recovery studies were also carried out. The % R.S.D. of recovery studies for TZ and RF were found to be 0.0673 and 0.0146, respectively. The method is validated for accuracy, precision, ruggedness and robustness.

journal_name

J Pharm Biomed Anal

authors

Gandhimathi M,Ravi TK,Varghese SJ

doi

10.1016/j.jpba.2004.09.039

subject

Has Abstract

pub_date

2005-02-07 00:00:00

pages

183-5

issue

1

eissn

0731-7085

issn

1873-264X

pii

S0731-7085(04)00465-0

journal_volume

37

pub_type

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