Mo-KAPLI TUNGSTEN-SARMAL ATOM TUZAK SOĞUK BUHAR ATOMİK ABSORPSİYON SPEKTROMETRİSİ KULLANILARAK MUSLUK SUYU VE BALIK KAS DOKUSU ÖRNEKLERİNDEKİ CIVA TAYİNİ İÇİN YENİ BİR TEKNİĞİN GELİŞTİRİLMESİ

Öz

Bu çalışmada, gaz halindeki cıvanın yerinde tuzaklanması için bir kuvars tüp atomlaştırıcı içine yerleştirilen Mo-kaplı tungsten-sarmal (W-sarmal) ile geleneksel soğuk buhar atomik absorpsiyon spektrometresi (CV-AAS) birleştirilerek ultra eser düzeyde toplam cıva (T-Hg) tayini için yeni ve düşük maliyetli bir teknik geliştirildi. Önerilen teknikteki parametrelerin optimum çalışma koşulları, daha düşük analiz seviyelerine inebilmek için deneysel olarak belirlendi. Geliştirilen teknikten elde edilen analitik sonuçlar geleneksel CV-AAS tekniğinden elde edilenlerle karşılaştırıldı. Geliştirilen teknik, karakteristik konsantrasyon (C0) ile ifade edildiği üzere, geleneksel tekniğe kıyasla duyarlılıkta 39,7 katlık bir zenginleştirme elde edildi. Önerilen teknik ile 120 saniyelik bir tuzaklama süresi için tayin sınırı (LOD) 0,017 µg L-1 ve bağıl standart sapma (RSD%) ise %3,6 olarak hesaplandı. Önerilen analitik prosedür, sertifikalı bir referans malzemeler, spike edilmiş musluk suyu örnekleri ve balık kas dokularındaki Hg konsantrasyonlarını belirlemek için kullanıldı. Su numuneleri için geri kazanım değerleri tatmin edici olup %104,9 ile %111,3 arasında değişmekteydi.

Anahtar Kelimeler

• Cıva Tayini
• Musluk suyu numuneleri
• Balık numuneleri
• Atom tuzak
• Mo-kaplı W-sarmal

DEVELOPMENT OF A NEW TECHNIQUE FOR DETERMINATION OF MERCURY IN TAP WATER AND FISH MUSCLE TISSUE SAMPLES USING Mo-COATED TUNGSTEN-COIL ATOM TRAP COLD VAPOR ATOMIC ABSORPTION SPECTROMETRY

Öz

In this study, a new and low-cost technique for the determination of ultra-trace level of total mercury (T-Hg) was developed by combining a Mo-coated tungsten-coil (W-coil) placed in a quartz tube atomizer for in situ trapping of gaseous mercury with a conventional cold vapor atomic absorption spectrometry (CV-AAS). The optimum operating conditions of the parameters in the proposed technique were determined experimentally in order to achieve lower detection limits. The analytical results obtained from the developed approach were compared with those obtained from the traditional CV-AAS technique. The developed technique demonstrated a significant 39.7-fold improvement in sensitivity compared to the traditional technique, as expressed by the characteristic concentration (C0). The technique described yielded a limit of detection (LOD) of 0.017 µg L-1 and a relative standard deviation (RSD%) of 3.6% for a capture time of 120 s. The proposed analytical procedure was utilized to determine the concentrations of Hg in certified reference materials, spiked tap water samples and fish muscle tissue samples. The recovery values for the water samples were satisfactory, ranging between 104.9% and 111.3%.

Anahtar Kelimeler

• Mercury determination
• Tap water samples
• Fish samples
• Atom trap
• Mo-coated W-coil

Kaynakça

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