Coulometric micro-titrator with a ruthenium dioxide pH-electrode

Autor:	Thomas Kappes, Peter C. Hauser, Carlo Colombo
Rok vydání:	2000
Předmět:	Inorganic chemistry Analytical chemistry chemistry.chemical_element Acid–base titration Biochemistry pH meter Copper Ruthenium oxide Analytical Chemistry Coulometry chemistry.chemical_compound chemistry Electrode Environmental Chemistry Hydroxide Titration Spectroscopy
Zdroj:	Analytica Chimica Acta. 412:69-75
ISSN:	0003-2670
DOI:	10.1016/s0003-2670(00)00765-0
Popis:	A coulometric diffusional titrator with a ruthenium dioxide pH-sensing electrode for the end-point detection in acid–base titrations is presented. The device was prepared by galvanic deposition of noble metals onto electrodes etched on a copper clad printed circuit board. Five electrodes were employed: three gold electrodes (two actuator and one counter) for the coulometric production of the titrating protons or hydroxide ions, and a RuO 2 -electrode and Ag/AgCl pseudo-reference electrode pair for the end-point detection. The RuO 2 -electrode for pH-measurements showed a linear response to the variation of the pH-value in the range from 2 to 12 pH-units and was useable for a period of 3 months. The device was found to yield linear relationships between the analyte concentration and the equivalence time for concentration ranges of acetic acid and ammonia between about 0.1 and 100 mM.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::43cd4a8ac40998824db7d0473e5f6a69 https://doi.org/10.1016/s0003-2670(00)00765-0 Zobrazit plný text záznamu Full Text from ScienceDirect