Fenobucarb ve Klorbensit Pestisitlerinin Atıksu ve Göl Suyu Örneklerinde Gaz Kromatografi-Kütle Spektrometresi ile Tayini

Pestisit üretiminin büyük ölçekte gelişimi tarım ürünlerinin kalitesinin ve miktarının artmasına önemli ölçüde katkıda bulunmaktadır ve haşere türlerden kaynaklanan hastalıkları engellemektedir. Bu faydalara rağmen, bu kimyasalların uygunsuz ve aşırı miktarlarda kullanımı insanlar ve çevredeki diğer organizmalar üzerinde olumsuz etkilere neden olabilmektedir. Bu nedenle, bu çalışma fenobucarb ve klorbensit pestisitlerinin atıksu ve göl suyu örneklerinde kütle seçici dedektör ile birleştirilmiş bir gaz kromotografi sistemi ile kalitatif ve kantitatif olarak tespit edilmesi amacıyla tasarlanmıştır. Bu iki analiti farklı alıkonma sürelerinde ayırmak için uygun bir sıcaklık programı kullanılmış ve optimum koşullar altında tatmin edici sistem performans değerleri elde edilmiştir. Tayin sonuçlarının doğruluğunun arttırılması için tüm standart çözeltiler ve standart ilave edilmiş örnekler gravimetrik olarak hazırlanmıştır. Analitler her iki test örneğinde de tespit edilmemiştir fakat yöntemin doğruluğunu değerlendirmek amacıyla standart ilave edilmiş geri kazanım çalışmaları yapılmıştır. Dış standart yöntemi kullanılarak hesaplanan yüzde geri kazanım değerleri %75’in altında elde edilmiştir. Bu nedenle, matriks etkilerini azaltmak amacıyla beş farklı standart ilave edilmiş derişim için matriks eşleştirmeli kalibrasyon yöntemi kullanılmış ve %100’e yakın geri kazanım sonuçları elde edilmiştir.

Anahtar Kelimeler:

Fenobucarb, Klorbensit, Pestisit, GC-MS, Atık su, Kuyu suyu

Determination of Fenobucarb and Chlorbenside in Wastewater and Lake Water Samples by Gas Chromatography Mass Spectrometry

The advent of pesticide production on large scale has contributed immensely to the quality and quantity of agricultural products, and averting diseases that stem from pest vectors. Despite these benefits, inappropriate or excessive usage of these chemicals could have negative impacts on humans and other organisms in the environment. Thus, this study was designed to detect and quantify fenobucarb and chlorbenside in wastewater and lake water samples by a gas chromatograph system coupled to a mass selective detector. A suitable temperature program was used to elute the two analytes at distinct retention times, and satisfactory system performance values were obtained under optimum conditions. All standard solutions and spiked samples were gravimetrically prepared in order to enhance the accuracy of quantification. The analytes were not detected in the two test samples, but spike recovery experiments were performed to validate the accuracy of the method. Percent recoveries calculated using the external calibration method were below 75%. Thus, matrix matching calibration method was used to mitigate matrix effects to obtain approximately 100% recovery results for five different spike concentrations.

Keywords:

Fenobucarb, Chlorbenside, Pesticide, GC-MS, Wastewater, Well water,

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