Title:A Statistical-based Stability-Indicating Assay for the Estimation of
Salbutamol and Ketotifen using HPLC and HPTLC Methods
Volume: 10
Author(s): Manik Ghosh*, Reetu Bandewar, Arijit Mondal, Suddhasattya Dey*, Saptarshy Sarkar, Padma Charan Behera, Sajal Kumar Jha and Sudip Kumar Mandal
Affiliation:
- Department of Pharmaceutical Analysis and Quality Assurance, Birla Institute of Technology, Mesra 835215, Ranchi,
Jharkhand, India
- IQ City Institute of Pharmaceutical Sciences, Durgapur, West Bengal 713206, India
Keywords:
HPLC, HPTLC, salbutamol, ketoifen, LOD, mastifen S.
Abstract:
Background: There are very few methods for simultaneously determining a combined dose
of SAL and KET.
Objectives: The current study aims to explore accurate, precise, simple, and cost-effective HPLC and
HPTLC techniques for the simultaneous assessment of Salbutamol (SAL) and Ketotifen (KET).
Methods: The determination of Salbutamol and Ketotifen was performed by HPLC and HPTLC methods
using 280 nm and 258 nm as the determination wavelength, respectively. Methanol was used to
dissolve the drug for estimation in HPLC using mobile phase methanol: 10mM di-Potassium hydrogen
orthophosphate in the ratio of 55:45 v/v of pH 4 at a flow rate of 1mL/min and in chloroform: toluene:
methanol (7: 2: 3 v/v/v) for the estimation in HPTLC. Moreover, a statistical comparison was made between
the results obtained through HPLC and HPTLC of Salbutamol (SAL) and Ketotifen (KET) using
the Student’s t-test and F-test.
Results: A linear response was observed in the range of 4-24 μg/mL and 2-12 μg/mL, respectively, for
SAL and KET for HPLC. R2 was found to be 0.9998 and 0.9999, respectively. For HPTLC, the linear
response was observed in the concentration range of 20-120 ng/ spot and 10 - 60 ng/ spot for SAL and
KET, respectively. R2 was found to be 0.9988 and 0.9998, respectively. The limit of detection (LOD)
for HPLC was estimated as 0.34 μg/ml and 0.10 μg/ml for SAL and KET, respectively, and for the
HPTLC method, the LOD was estimated as 4.8 μg/ml and 1.5 μg/ml, respectively. Analysing the marketed
formulation by using both methods, SAL and KET within the range of 100 ± 2% were recovered.
The results obtained after the estimation of the Mastifen S tablet by applying both methods were according
to nominal content. Degradation studies were performed using both methods. It was found that
Salbutamol was unstable in hydrolytic, oxidative and thermal degradation, whereas stable in photolytic
conditions. Ketotifen was found to be stable in thermal and photolytic conditions and unstable in hydrolytic
and oxidative conditions.
Conclusion: The proposed stability indicating HPLC and HPTLC methods for SAL and KET was
found to be simple, accurate, and reproducible for quantitative estimation in pharmaceutical dosage
form, without interference from the excipients or degradation products from the main drug component.
