İyon-Seçici Elektrotlar Kullanılarak Çevre Numunelerindeki Sularda Sertlik Tayini

Yıl 2019, Cilt: 1 Sayı: 1, 8 - 19, 15.01.2019

Adem Asan

Öz

Bu
çalışmada, suyun sertliğinin belirlenmesinde kullanılmak üzere ticari olarak
satın alınan iyonofor maddeler ile Ca²⁺ ve Mg²⁺-seçici
mikro boyutta potansiyometrik PVC-membran elektrotlar geliştirildi. Hazırlanan
Ca²⁺ ve Mg²⁺-seçici elektrotların potansiyometrik
performans karakteristikleri belirlendi ve ölçümlerde ana iyon çözeltisine karşı
her 10 kat konsantrasyon değişimi için sırasıyla ortalama 23.5 ve 27.6 mV
potansiyel farkı gözlendi. Elektrotların, 1x10^-1-1x10^-5
mol L^-1 derişim aralığında ana iyon çözeltisine karşı doğrusal
davranış sergilediği, alkali ve toprak alkali metal iyonlarının yanında ana
iyona karşı oldukça seçici olduğu belirlendi. Laboratuvarda hazırlanan
potansiyometrik PVC-membran iyon-seçici elektrotlar kullanılarak çevre numunelerdeki
suların sertlik tayini durgun ortamda gerçekleştirildi. Ayrıca, su
numunelerinin sertliği standart sertlik tayin yöntemi olan kompleksometrik EDTA
titrasyonu ile de yapıldı. Daha sonra numunelerin sertlikleri AAS tekniği
kullanılarak analiz edildi ve tüm ölçümler potansiyometrik sonuçlarla karşılaştırmalı
olarak verildi. Elde edilen sonuçlar, geliştirilen Ca²⁺ ve Mg²⁺-seçici
mikro boyutta potansiyometrik PVC-membran elektrotların sulardaki sertlik
tayininde rutin olarak kullanılabileceğini göstermektedir.

Anahtar Kelimeler

İyon-seçici PVC-membran elektrot, Potansiyometri, , Suda sertlik tayini

Kaynakça

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