Natural Sulphide Minerals as Sensors for Determination of Total Acidity of Humic and Fulvic Acids
Abstract:For the purpose of this paper the following natural minerals: pyrite (FeS2), chalcopyrite (CuFeS2), galena (PbS), covellite (CuS) and chalcocite (Cu2S), were used as the indicator electrode for coulometric–potentiometric and potentiometric titrations of complex natural acid–base systems. These results were compared with those obtained by using of glass indicator electrode. The acidity of humic acid macromolecules was determined by combined coulometric–potentiometric method in alkaline solution which contained the sample of the substance that was being tested. Hydrogen ions generated by anode oxidation of hydrogen dissolved in palladium, while for the purpose of determining acidity of fulvic acids either in water and non-water environment (methanol, ethanol, acetone) tetraethylammonium hydroxide solution in methanol was used.
Document Type: Research Article
Publication date: 2009-08-01
More about this publication?
- The growing interest and activity in the field of sensor technologies requires a forum for rapid dissemination of important results: Sensor Letters is that forum. Sensor Letters offers scientists, engineers and medical experts timely, peer-reviewed research on sensor science and technology of the highest quality. Sensor Letters publish original rapid communications, full papers and timely state-of-the-art reviews encompassing the fundamental and applied research on sensor science and technology in all fields of science, engineering, and medicine. Highest priority will be given to short communications reporting important new scientific and technological findings.
- Editorial Board
- Information for Authors
- Subscribe to this Title
- Terms & Conditions
- Ingenta Connect is not responsible for the content or availability of external websites