in this work, a novel zr02+ pvc-based membrane sensor based on 4,7,13,16,21,24-hexa oxa-1,10- diazabicyclo[8,8,8]- hexa cosane (hodbhc) as a new ionophore is presented. the sensor displays a linear dynamic rangebetween 1.0x 10-1 and 1.0x10 6 m, with a near nernstian slope of 29.9 ± 0.4 mv per decade in an acidic solution(ph=1). the limit of detection is 8.0 x 1 0 7 m. the electrodes possess adv...

this paper has two objectives. first, it establishes a model for scoring the access to pharmaceutical services. second, it develops a model for measuring socioeconomic indicators independent of the time and place of study. these two measures are used for measuring equity in access to pharmaceutical services using concentration curve. we prepared an open-ended questionnaire and distributed it to...

Conducting polymers (CPs) are highly conjugated organic macromolecules, where the electrical charge is transported in intra- and inter-chain pathways. Polyacetylene, polythiophene its derivatives, polypyrrole polyaniline among best-known examples. These compounds have been used as electrode modifiers to gain sensitivity selectivity a large variety of analytical applications. This review, after ...

A method based on microwave-induced combustion (MIC) was applied for medicinal plants digestion allowing further chlorine determination by potentiometry using ion-selective electrode (ISE). Sample masses ranging from 500 to 1000 mg were evaluated MIC digestion. Water and 10, 25, 50, 100 mmol/L NH4OH investigated as absorbing solutions. The accuracy of the proposed certified reference materials ...