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Inne
Polypyrrole—methyl orange Raman pH sensor.
Autorzy
Rok wydania
2019
Czasopismo
Numer woluminu
11
Strony
715/1-715/6
DOI
10.3390/polym11040715
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Streszczenie
An easy-to-prepare pH sensor based on electrochemically obtained polypyrrole doped
with methyl orange ions is described. It enables the determination of a pH value in the 3–13 range for
volumes below 1 L. In a wide pH range, resonance and pre-resonance methyl orange Raman spectra,
excited with the 514.5 nm line of an Ar+ laser, changed noticeably in function of H+ concentration.
Two types of measurements were performed. In the first case, Raman spectra of the analyzed solutions
were collected for samples placed on the sensor surface using a confocal microscope equipped with a
10x objective. Next, measurements were conducted for the same samples without the sensor. On the
basis of these spectra, partial least-squares models were elaborated and validated. Relative standard
errors of prediction for calibration, validation, and test samples were found to be in the 3.7%–3.9%
range. An analogous model build using spectra registered without the sensor was characterized by
slightly worse parameters.
Słowa kluczowe
Raman sensor, pH determination, polypyrrole, acid–base indicators, multivariate analysis
Licencja otwartego dostępu
Licencja na prawach której można swobodnie kopiować, rozprowadzać, zmieniać i remiksować objęty prawem autorskim utwór (Utwór-przedmiot prawa autorskiego) pod warunkiem podania imienia i nazwiska autora utworu pierwotnego oraz źródła pochodzenia utworu.
Pełny tekst licencji: https://creativecommons.org/licenses/by/3.0/pl/legalcode
Adres publiczny
http://dx.doi.org/10.3390/polym11040715
Strona internetowa wydawcy
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