Acid-base potentiometric titration using a stainless steel electrode without oxidative treatment
نویسندگان
چکیده
An AISI 304 stainless steel laminar electrode without oxidative treatment was investigated for the potentiometric titration of hydrochloric acid with sodium hydroxide. The proposed obtained from metalworking cuttings. Scanning electron microscopy, energy dispersive X-ray spectroscopy, fluorescence spectroscopy and diffraction were used to study surface morphology chemical composition electrode. showed a sensitivity 59.18 ± 0.37 mV/pH, which reproducible under intermediate conditions. Potentiometric curve deviations pH 9.5 respect glass However, this did not affect quantification as jumps curves coincided. endpoint 9.25 mL both electrodes concentration 0.0845 mol/L, deviation 0.0004 mol/L standard 0.0841 mol/L. nonartificially oxidised show any crystalline oxide phases, whereas after oxidation it semicrystalline phases iron chromium oxides increased crystallinity steel. Despite low content oxides, can give Nernstian response pH, depending on characteristics material. This leads need calibrate prior rule out modification.
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ژورنال
عنوان ژورنال: Turkish Journal of Chemistry
سال: 2023
ISSN: ['1300-0527', '1303-6130']
DOI: https://doi.org/10.55730/1300-0527.3580