İyonofor Olarak Bir Kaliks[4]aren Türevinin Kullanıldığı İyodür-Seçici PVC Membran Elektrot

Tuğçe GÖVER, H. Elif KORMALI ERTÜRÜN, Ayça DEMİREL ÖZEL, Serkan ERDEMİR, Esin CANEL
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Öz


Bu çalışmada, iyonofor olarak 5,11,17,23-tetra(tert-bütil)-25,26,27,28-tetra(4-propilimidazol asetamit)-kaliks[4]aren bileşiğinin kullanıldığı iyodür-seçici yeni bir polivinil klorür (PVC) membran elektrot hazırlandı. İyodür –seçici membranın hazırlanmasında kullanılan PVC, o-nitrofeniloktileter (o-NPOE; plastikleştirici) ve iyonoforun oranı değiştirilerek, optimum membran bileşimi %2 iyonofor, %29,7 PVC, %68,3 o-NPOE olarak bulundu. pH 4,0'de elektrodun doğrusal çalışma aralığının ve eğiminin sırasıyla 1,0x10-5 – 1,0x10-2 M ve 52,1± 2,6 mV/pI olduğu belirlendi. Önerilen elektrodun oldukça kısa bir cevap süresine (5-10 s) ve 5 ay’dan daha uzun bir ömre sahip olduğu gözlendi. Elektrot diğer anyonlar varlığında I->Salisilat > ClO4- > NO3- > SCN- ≈ Benzoat> NO2- > Br- > Cl- > F- > Sitrat > HCOO- sırasında bir seçicilik gösterdi. Ayrıca, önerilen elektrot, gümüş nitrat ile iyodürün çöktürme titrasyonunda indikatör elektrot olarak başarılı bir şekilde kullanıldı.

Anahtar kelimeler


Kaliks[4]aren; İyodür-seçici elektrot; PVC membran; Potansiyometri; Çöktürme titrasyonu

Tam metin:

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DOI: http://dx.doi.org/10.19113/sdufbed.83711

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