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Stability-indicating HPLC Method for Simultaneous Quantification of 14 Impurities in Excedrin Tablet Formulations and Identification of New Impurity by LC-MS in Accelerated Stability Studies

Stability-indicating HPLC Method for Simultaneous Quantification of 14 Impurities in Excedrin Tablet Formulations and Identification of New Impurity by LC-MS in Accelerated Stability Studies

Thirupathi Dongala, Naresh Kumar Katari, Ashok Kumar Palakurthi, Sreekantha B Jonnalagadda

Biomed Chromatogr. 2019 Oct;33(10):e4608.

PMID: 31145484

Abstract:

We developed novel stability-indicating HPLC method for simultaneous estimation of 14 impurities in excedrin tablet, a formulation with a combination of acetaminophen, aspirin, and caffeine. In addition, a new impurity that was generated through degradation of aspirin at high temperatures during the accelerated stability conditions was positively identified and confirmed, using liquid chromatography-mass spectrometry technique. The HPLC method was optimized using the Inertsustain C18 , 250 × 4.6 mm, 5.0 μm column, employing simple gradient method. Forced degradation studies were performed under acidic, basic, oxidative and thermal conditions to prove the scope and stability-indicating the nature of the method. The optimized method was validated as per the International Conference on Harmonization guidelines. The HPLC method showed linearity from LOQ concentration to 21 μg mL-1 . Precision and intermediate precision values were <5% RSD. The validated HPLC method is currently applied for the routine testing of excedrin tablet formulations in quality control laboratories.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP118934-B	Acetaminophen Impurity I		118-93-4	Price
AP519324	Caffeine Impurity C		519-32-4	Price

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