A clean photometric method for the determination of Losartan potassium (cas 12475-99-8) in pharmaceuticals exploiting light scattering effect and employing a multicommuted flow analysis approach

Add time:08/16/2019    Source:sciencedirect.com

This paper describes an environmentally friendly procedure for the determination of Losartan potassium (cas 12475-99-8) (Los-K) in pharmaceuticals. The photometric method was based on the light scattering effect due to particles suspension, which were formed by the reaction of Los-K with Cu (II) ions. The method was automated employing a multicommuted flow analysis approach, implemented using solenoid mini-pumps for fluid propelling and a homemade LED based photometer. Under the optimized experimental conditions, the procedure showed a linear relationship in the concentration range of 23.2–417.6 mg L–1 (r=0.9997, n=6), a relative standard deviation of 1.61% (n=10), a limit of detection (3.3*σ) estimated to be 12.1 mg L–1, and a sampling rate of 140 determinations per hour. Each determination consumed 12 µg of copper (II) acetate and generated 0.54 mL of waste.

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