Potansiyometrik tiyosiyanat tayini için nanomalzeme ile modifiye edilmiş katı-temaslı elektrotların hazırlanması
Küçük Resim Yok
Tarih
2025
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
İnönü Üniversitesi
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Bu çalışmada, iyonofor olarak diklorobis(metildifenilfosfin)palladyum(II) kompleksinin kullanıldığı yeni bir tiyosiyanat-seçici katı-temaslı nanokompozit elektrot hazırlandı. Bazı metal oksit nanopartiküllerinin karbon pasta bileşimine eklenmesiyle hazırlanan bu elektrodun; en iyi performans özelliklerini sergilediği optimum bileşimi % 11,6 grafit tozu, % 34,8 iyonofor, % 13,0 o-nitrofenil oktileter (o-NPOE), % 31,9 tetraheptilamonyum tetrafenilborat (THATFB) ve % 8,7 kobalt oksit nanopartikülleri (Co3O4 NP) olarak bulundu. Nanokompozit elektrodun çalışma aralığı, eğimi, kullanım ömrü, alt tayin sınırı ve cevap süresi sırasıyla 1,0×10-1 -1,0×10-6 M, 59,7±0,6 mV/pSCN, en az 2 ay, 1,4×10-8 M ve 5 s'dir. Ayrıca, farklı anyonların varlığında pH 4,0'da ayrı çözelti yöntemiyle hesaplanan seçicilik katsayılarının sırası karbonat> salisilat> perklorat> iyodür> klorür> nitrat> nitrit> sülfit> bromür> asetat> florür olarak bulundu. Elektrodun, tiyosiyanat tayini için iyi çalışan bir indikatör elektrot olduğu bir veteriner ilaç numunesinde gösterildi
In this study, a new thiocyanate-selective solid-contact nanocomposite electrode was prepared by using dichlorobis(methyldiphenylphosphine) palladium(II) complex as ionophore. The optimum composition exhibiting the best performance characteristics of this electrode, constructed by adding some metal oxide nanoparticles to the carbon paste composition, was found as 11.6 % graphite powder, 34.8 % ionophore, 13.0 % o-nitrophenyl octylether (o-NPOE), 31.9 % tetraheptylammonium tetraphenylborate (THATFB) and 8.7 % cobalt oxide nanoparticles (Co3O4 NP). The linear range, slope, lifetime, detection limit, and the response time of the nanocomposite electrode are 1.0×10-1 – 1.0×10-6 M, 59.7±0.6 mV/pSCN, at least 2 months, 1.4×10-8 M and 5 s, respectively. Furthermore, the order of the selectivity coefficients calculated by the separate solution method in the presence of other anions at pH 4.0 was found as carbonate> salicylate> perchlorate> iodide> chloride> nitrate> nitrite> sulfite> bromide> acetate> fluoride. It was shown to be a well-functioning indicator electrode for the quantification of thiocyanate in a veterinary drug sample.
In this study, a new thiocyanate-selective solid-contact nanocomposite electrode was prepared by using dichlorobis(methyldiphenylphosphine) palladium(II) complex as ionophore. The optimum composition exhibiting the best performance characteristics of this electrode, constructed by adding some metal oxide nanoparticles to the carbon paste composition, was found as 11.6 % graphite powder, 34.8 % ionophore, 13.0 % o-nitrophenyl octylether (o-NPOE), 31.9 % tetraheptylammonium tetraphenylborate (THATFB) and 8.7 % cobalt oxide nanoparticles (Co3O4 NP). The linear range, slope, lifetime, detection limit, and the response time of the nanocomposite electrode are 1.0×10-1 – 1.0×10-6 M, 59.7±0.6 mV/pSCN, at least 2 months, 1.4×10-8 M and 5 s, respectively. Furthermore, the order of the selectivity coefficients calculated by the separate solution method in the presence of other anions at pH 4.0 was found as carbonate> salicylate> perchlorate> iodide> chloride> nitrate> nitrite> sulfite> bromide> acetate> fluoride. It was shown to be a well-functioning indicator electrode for the quantification of thiocyanate in a veterinary drug sample.
Açıklama
Anahtar Kelimeler
Kimya, Chemistry
