DETECTING XYLENE LEVEL IN WATER BY USING QCM SENSOR COATED WITH PHTHALOCYANINE

Öz

In this study, a system design was developed to detect the xylene which is the one of the harmful chemicals for water resources. In the system, phthalocyanine coated quartz crystal microbalance (Quartz Crystal Microbalance - QCM) was used as chemical sensor. For sensor preparation an automatic coating instrument is employed which is based on airbrush technique. By using the designed measuring system, changes in the oscillation frequency of the QCM sensor were observed by the microcontroller based control unit and it was determined whether the sample includes xylene or not. According to the results obtained, it has been observed that the response of the sensor and the system is a linear response in the measured range. Moreover, the measurement data was transferred to the internet via Wi-Fi connection and the data changes can be observed online with the developed Android application.

Anahtar Kelimeler

• QCM sensor,xylene,Wi-Fi

SUDAKİ KSİLEN SEVİYESİNİN FTALOSİYANİN KAPLI QCM SENSÖR İLE TESPİT EDİLMESİ

Öz

Bu çalışmada su kaynakları için zararlı kimyasallardan biri olan ksileni tespit etmeye yarayan bir sistem tasarımı gerçekleştirilmiştir. Sistemde, Ftalosiyanin ile kaplı kuvars kristal mikrobalans (Quartz Crystal Microbalance - QCM) kimyasal sensör olarak kullanılmıştır. Sensörü hazırlamak için airbrush tekniğine dayanan otomatik bir kaplama düzeneğinden yararlanılmıştır. Tasarlanan ölçüm sistemi sayesinde QCM sensörün salınım frekansındaki değişimler mikrodenetleyicili kontrol ünitesi tarafından gözlemlenmiş ve değişimlere göre numune suda ksilen olup olmadığı tespit edilmiştir. Elde edilen sonuçlara göre, sensörün ve sistemin tepkisinin ölçüm yapılan aralıkta lineer bir tepki olduğu gözlemlenmiştir. Aynı zamanda ölçüm verileri Wi-Fi bağlantısı ile internet ortamına aktarılmış, geliştirilen Android uygulaması sayesinde veri değişimleri çevrimiçi olarak gözlemlenebilmiştir.

Anahtar Kelimeler

• QCM sensör,ksilen,Wi-Fi

Kaynakça

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