A novel potentiometric pH electrode based on sulfated natural Fe<sub>3</sub>O<sub>4</sub> and analytical application in food samples

dc.authorid Demir, Ersin/0000-0001-9180-0609
dc.authorscopusid 56470686700
dc.authorscopusid 55910480000
dc.authorwosid Demir, Ersin/V-6633-2019
dc.contributor.author Kemer, Baris
dc.contributor.author Demir, Ersin
dc.date.accessioned 2024-05-25T11:19:19Z
dc.date.available 2024-05-25T11:19:19Z
dc.date.issued 2018
dc.department Okan University en_US
dc.department-temp [Kemer, Baris] Karadeniz Tech Univ, Dept Chem, Fac Sci, TR-61100 Trabzon, Turkey; [Demir, Ersin] Okan Univ, Dept Food Engn, Fac Engn, TR-34959 Istanbul, Turkey en_US
dc.description Demir, Ersin/0000-0001-9180-0609 en_US
dc.description.abstract A novel solid state potentiometric pH electrode based on sulfated natural Fe3O4 silicone was fabricated. The optimum potentiometric performances such as Nernstian response, response time, selectivity, life-time and reproducibility of pH electrodes were investigated by using a computer-controlled potentiometric device. Moreover, the potentiometric performance of the solid state pH electrodes was studied with different mixtures sulfated natural Fe3O4, silicone and graphite powder. The best potentiometric behavior of proposed pH electrode was obtained with a composition of 20% (w/w) sulfated natural Fe3O4, 40% (w/w) graphite powder and 40% (w/w) silicone. The sub-Nernstian response for pH electrode was exhibited with a slope of 30.8 +/- 1.4mV/pH (r=0.9963) from pH 2 to pH 12. In addition, the dynamic response time was found as 10s in acidic medium and further the proposed pH electrode can be used for at least 1year without any significant slope of the pH-potential curve. The selectivity coefficient of pH electrode was interpreted according to fixed interference method in the presences of Na+, Li+, K+, NH4+, SO42, CH3COO and NO3 ions. The reproducibility of pH electrode was calculated in pH 4 and pH 6 phosphate buffers and it was found as 0.24 RSD (%) and 0.27 RSD (%) respectively. The proposed pH electrode was used to determine of pH in acidbases titration compared with glass pH electrode and is highly stable in corrosive systems including HF solution. Terminally, the pH value was successfully determined in some soft drinks and milk samples by proposed solid state pH electrode at 95% confidence level with satisfactory agreement compared with glass pH electrode. en_US
dc.identifier.citationcount 3
dc.identifier.doi 10.1007/s11694-018-9842-0
dc.identifier.endpage 2262 en_US
dc.identifier.issn 2193-4126
dc.identifier.issn 2193-4134
dc.identifier.issue 4 en_US
dc.identifier.scopus 2-s2.0-85049134676
dc.identifier.scopusquality Q2
dc.identifier.startpage 2256 en_US
dc.identifier.uri https://doi.org/10.1007/s11694-018-9842-0
dc.identifier.uri https://hdl.handle.net/20.500.14517/403
dc.identifier.volume 12 en_US
dc.identifier.wos WOS:000452363700002
dc.identifier.wosquality Q2
dc.language.iso en
dc.publisher Springer en_US
dc.relation.publicationcategory Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı en_US
dc.rights info:eu-repo/semantics/closedAccess en_US
dc.scopus.citedbyCount 4
dc.subject pH ion selectivity electrode en_US
dc.subject pH determination en_US
dc.subject Solid state electrode en_US
dc.subject Food samples en_US
dc.title A novel potentiometric pH electrode based on sulfated natural Fe<sub>3</sub>O<sub>4</sub> and analytical application in food samples en_US
dc.type Article en_US
dc.wos.citedbyCount 2

Files