Impurities test for Caffeine (EP-8.0 method)

Impurities test for Hydrochlorothiazide (EP- method): SAMPLE PREPARATION: Reference solution-a: Dissolve 3mg of Impurity-A and 3mg of Hydrochlorothiazide in 5ml of mixture of equal volumes of acetonitrile and methanol if necessary dilute to 20ml with phosphate buffer solution pH 3.2.…

Impurities test for Sulfadiazine (EP-8.0 method): SAMPLE PREPARATION: Solvent Mixture: 40 g/L solution of Sodium Hydroxide, Acetonitrile, Water (2:20:60 v/v/v) Test Solution: Dissolve 50 mg of Sulfadiazine in solvent mixture and dilute to 100ml with water. Reference solution (a): Dissolve…

Impurities test for Trimethoprim (EP-8.0 method) - For Impurities-E, D, G, B, J and F: SAMPLE PREPARATION: Test Solution: Dissolve 25mg of Trimethoprim in Mobile phase and dilute to 25ml with mobile phase Reference solution (a): Dilute 1ml of test…

Impurities test for Mefenamic Acid (EP- method): SAMPLE PREPARATION: Test solution: Dissolve 25 mg of Mefenamic acid in mobile phase and dilute to 25 ml with mobile phase. Reference Solution A: Dissolve 1mL of test solution to 100 mL with…