Dispersif Sivi Sivi Mikro Ekstraksiyon Yöntemi İle Kobalt(Ii)’Nin Zenginleştirilmesi Ve Alevli Atomik Absorpsiyon Spektrometresi İle Tayini

Year 2021, Volume: 8 Issue: 15, 1 - 14, 01.06.2021

Esra Turan Özcan Yalçınkaya

Abstract

Bu çalışmada, dispersif sıvı sıvı mikroekstraksiyon ile kobaltın zenginleştirilmesi ve ayrılması amacıyla ligand olarak sodyum dietilditiyokarbamat (NaDDC) kullanılarak kobalt(II)’nin su
ve çay örneklerinde FAAS ile tayini için yöntem araştırılmıştır. Kobaltın geri kazanma verimi üzerine etkilerinin araştırılması için pH, ligant miktarı, dispersif ve ekstraksiyon çözücü türleri
ve miktarları gibi değişkenler optimize edilmiş, yabancı iyon etkileri incelenmiştir. Analiz için uygun pH 2 olarak belirlenmiştir. Ekstraksiyon çözücüsü olarak etanol, dispersif çözücü olarak
karbontetraklorür seçilmiştir. Belirlenen optimum şartlarda kobalt için %95 güven seviyesinde geri kazanma verimi %96±3, gözlenebilme sınırı (LOD) 41 μg/L, tayin sınırı (LOQ) 136 μg/L
olarak hesaplanmıştır. Yöntemin doğruluğu standart referans maddeler ile kontrol edildi. DLLME ve FAAS’nin birleştirilmesi, kobalt tayini için kolay uygulanabilir, az maliyetli ve hızlı bir yöntemdir.

Keywords

Dispersif sıvı-sıvı mikroekstraksiyon, zenginleştirme, kobalt, FAAS, Dispersif sıvı-sıvı mikroekstraksiyon, zenginleştirme, kobalt, FAAS

Enrichment of Cobalt(Ii) By the Method of Dispersive Sivi Sivi Micro Extraction And Determination By Flame Atomic Absorption Spectrometer

Abstract

In this work, the method was investigated for the determination of cobalt (II) in water samples and tea samples with FAAS using sodium diethyldithiocarbamate (NaDDC) as ligand, in order to enrich and separate cobalt by dispersive liquid fluid microextraction. Variables such as pH, ligand amount,dispersive and extraction solvent types and amounts were optimized and the effects of foreign ions were examined in order to investigate the effects on recovery of cobalt. It was determined that the appropriate pH for analysis was 2. Ethanol was selected as Extraction solvent, carbon tetrachloride was selected as the dispersive solvent. In the specified optimum conditions, for cobalt has calculated the recovery yield at 95% confidence level as 96±3%, the limit of detection (LOD) 41 μg/L, the limit of quantification (LOQ) 136 μg/L. The correctness of the method was checked with standard reference material. The coupling of the DLLME and FAAS is easy to implement for the cobalt determination, it is a low cost and quickly method.

Keywords

Dispersif sıvı-sıvı mikroekstraksiyon, zenginleştirme, kobalt, FAAS

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