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- Title
Selective determination of Cr(III) ions with novel potentiometric electrodes.
- Authors
Isildak, Ömer; Özbek, Oguz; Yildiz, Ilyas; Senocak, Aysegül
- Abstract
Background: Ionophores in the composition of potentiometric ion‐selective electrodes interact directly with the analyte ion and enable the determination of ionic species in various samples. Objectives: In this study, a novel ion‐selective electrode based on 5‐bromosalicylaldehyde thiosemicarbazone was developed for the selective determination of Cr3+ ions. Methods: The optimum electrode composition contained ionophore, poly (vinyl chloride) (PVC), bis (2‐ethylhexyl) sebacate (BEHS) and potassium tetrakis (p‐chlorophenyl) borate (KTpClPB) in ratios of 4.0: 61.0: 34.0: 1.0 (mg), respectively. Potential measurements were performed using a computer‐controlled multi‐channel potentiometric measurement system. Results: The developed Cr (III)‐selective electrode exhibited a low detection limit of 3.96 × 10−6 M over a wide concentration range of 1.0 × 10−5 – 1.0 × 10−1 M (R2: 0.9979). The electrode exhibited good selectivity towards Cr3+ ions among metal ions with different charges. The chromium (III)‐selective electrode, which exhibited highly reproducible results in three different concentration ranges, also had a very fast response time of 5 s. Conclusions: The developed Cr (III)‐selective electrode were successfully performed in various beverage samples. As a result, the proposed electrode can be an alternative to other analytical methods in the analysis of Cr3+ ions.
- Subjects
ELECTRODES; ION analysis; THIOSEMICARBAZONES; VINYL chloride; METAL ions; DETECTION limit
- Publication
Journal of the Chinese Chemical Society, 2023, Vol 70, Issue 9, p1814
- ISSN
0009-4536
- Publication type
Article
- DOI
10.1002/jccs.202300165