Elektrokimyasal Yöntemlerle Bakır (ıı) ve Cıva (ıı) Tayini
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2021
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Konya Teknik Üniversitesi
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Son yıllarda endüstrinin ve teknolojinin gelişmesiyle birlikte yüksek saflıktaki maddelere olan ihtiyacın artması, hava, su, toprak kirliliğinin canlılar üzerindeki etkisi gibi çevre sorunlarının giderek önem kazanması ve eser elementlerin sağlık üzerindeki etkilerinin bilinmesi, bu elementlerin analizlerini analitik kimyanın en önemli araştırma konularından biri haline getirmiştir. Bu nedenle, çevreye yayılan eser elementlerin canlılara ve çevreye yaptıkları olumsuz etkiler sebebiyle bu elementlerin analizi için çeşitli yöntemler geliştirilmektedir. Bu yöntemlerden biri olan diferansiyel puls anodik sıyırma voltametrisi yöntemi ise duyarlılığı ve seçiciliği sebebiyle tercih edilen elektrokimyasal bir yöntemdir. Yapılan tez çalışmasında, camsı karbon elektrot (GCE), NiFe2O4-rGO kompoziti ile modifiye edilerek elektrokimyasal olarak ağır metal tayininde ilk kez bu tez kapsamında kullanılmıştır. NiFe2O4- rGO/GCE ile diferansiyel puls anodik sıyırma voltametrisi (DPASV) tekniği kullanılarak Cu (II) ve Hg (II) ağır metallerinin tayini gerçekleştirilmiştir. Bu amaçla, biriktirme potansiyeli, biriktirme süresi, elektrolit türü, elektrolit derişimi, elektrolit pH'ı ve substrat derişimi gibi deneysel parametreler incelenerek, pik akımını etkileyen parametrelerin optimum koşulları belirlenmiştir.
In recent years, with the development of industry and technology, the need for high-purity substances has increased, and environmental problems such as the impact of air, water, soil pollution on living things have become increasingly important and knowing the effects of trace elements on health, the analysis of these elements has become one of the most important research topics in analytical chemistry. For this reason, various methods are being developed for the analysis of these elements due to the negative effects of trace elements spreading to the environment on living things and the environment. One of these methods, the differential pulse anodic stripping voltammetry method, is an electrochemical method of choice due to its sensitivity and selectivity. In this study, the glassy carbon electrode (GCE) was modified with NiFe2O4-rGO composite and used for the first time in the electrochemical determination of heavy metals. Determination of Cu (II) and Hg (II) heavy metals was performed using differential pulse anodic stripping voltammetry (DPASV) technique with NiFe2O4-rGO/GCE. For this purpose, experimental parameters such as deposition potential, deposition time, electrolyte type, electrolyte concentration, electrolyte pH and substrate concentration were examined and optimal conditions of parameters affecting peak current were determined.
In recent years, with the development of industry and technology, the need for high-purity substances has increased, and environmental problems such as the impact of air, water, soil pollution on living things have become increasingly important and knowing the effects of trace elements on health, the analysis of these elements has become one of the most important research topics in analytical chemistry. For this reason, various methods are being developed for the analysis of these elements due to the negative effects of trace elements spreading to the environment on living things and the environment. One of these methods, the differential pulse anodic stripping voltammetry method, is an electrochemical method of choice due to its sensitivity and selectivity. In this study, the glassy carbon electrode (GCE) was modified with NiFe2O4-rGO composite and used for the first time in the electrochemical determination of heavy metals. Determination of Cu (II) and Hg (II) heavy metals was performed using differential pulse anodic stripping voltammetry (DPASV) technique with NiFe2O4-rGO/GCE. For this purpose, experimental parameters such as deposition potential, deposition time, electrolyte type, electrolyte concentration, electrolyte pH and substrate concentration were examined and optimal conditions of parameters affecting peak current were determined.
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Bilim ve Teknoloji, Science and Technology, Kimya, Chemistry, Kimya Mühendisliği, Chemical Engineering, Anodik sıyırma voltametrisi, Anodic stripping voltammetry, Ağır metal iyonları, Heavy metal ions, Ağır metal kirliliği, Heavy metal pollution, Ağır metaller, Heavy metals, Diferensiyel vurulu sıyırma voltametrisi, Differential pulse stripping voltammetry, Dönüşümlü voltametri, Cyclic voltammetry, Karbon elektrot, Carbon electrode, Kimyasal sensör, Chemical sensor
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