Sample preparation
A homogenized representative sample (10 mg) was transferred
to a 10 mL volumetric flask and made up to the
mark with mobile phase with intermittent shaking. Simulated
samples were simultaneously prepared by mixing
methaqualone, phenacetin, paracetamol and saccharin in
different proportions. The simulated samples were
analyzed by the proposed method for validation studies.
Standards and samples were ultrasonicated for 15 min
and filtered through a Whatmann No.1 (Cellulose,Particle retention of 11μm) filter paper prior to injection
into the HPLC system.