Article ID Journal Published Year Pages File Type
10562964 Talanta 2005 4 Pages PDF
Abstract
In this paper, a new high sensitivity potentiometric pH-electrode with a response in the acid region is proposed. It consists of a PbO2-paraffin matrix deposited on graphite. Its simple construction and studies of some variables at 0.5 mol L−1 ionic strength are reported. A direct relationship between the electric potential difference and the solution pH was observed for pH values ranging from 1.2 to 7.5. A slope greater than 100 mV/decade and a conditional electric potential of about 1250 mV were obtained. The results presented a high correlation with those from a conventional glass pH-electrode in complex matrix samples.
Keywords
Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
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