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Two new potentiometric sensors were created for the quantification of bisoprolol fumarate and alverine citrate in bulk pharmaceutical dosage forms and human serum. Bisoprolol and alverine sensors were manufactured by combining potassium tetrakis ( p -chlorophenyl) borate ion pairs to serve as electroactive substances, plasticized poly (vinyl chloride) matrix membranes, and  o -nitrophenyl octyl ether. They demonstrated high responses over the concentration ranges of 1.0×10 −6  to 1.0×10 −2  mol L −1  bisoprolol and alverine with close to Nernstian cationic slopes of 52 and 56 mV decade −1 , respectively. The detection limits for bisoprolol and alverine were 2.6×10 −6  and 1.75×10 −6  mol L −1 , respectively. For both medications, the response time was instantaneous (2.0 s). The working pH ranges for bisoprolol and alverine were 4.50–8.50 and 2.00–8.80, respectively. For both sensors, the life cycle was long (3 months). The sensors were used in pharmaceutical dosage types for the assay of bisoprolol and alverine, recording average recoveries of 99.40% and 99.98% respectively and were also successfully used for estimating the two drugs in human serum with an average recovery of 99.60% for both drugs. For all multiple staged interfering materials, the reported latest potentiometric sensor methods displayed high selectivity. The current sensor obtained a high percentage recovery and an excellent relative standard deviation compared with those obtained from previously published methods.

Novel potentiometric methods for the estimation of bisoprolol and alverine in pharmaceutical forms and human serum