MUĞLA İLİNDEN TOPLANAN BAZI SU ÖRNEKLERİNDE HİDRÜR OLUŞTURMALI-ATOMİK ABSORPSİYON SPEKTROMETRİ YÖNTEMİ İLE AS(III) VE TOPLAM ARSENİK TAYİNİ

Year 2016, , 160 - 165, 19.12.2016

Muhammet Karabaş , Recep Dikicioğlu İbrahim Kula , Ali İmran Vaizoğullar

https://doi.org/10.22531/muglajsci.283640

Abstract

Bu çalışmada, hidrür oluşturmalı-atomik absorpsiyon
spektrofotometrisi kullanılarak eser miktardaki inorganik As(III) ve As(V)’in
direk olarak değerlendirilmesi ve türlemesi için kolay ve güçlü bir prosedür
geliştirilmiştir. Toplam arsenik miktarı, 0.30 % (w/v) askorbik asit ve 1.0 %
(w/v) KI kullanılarak, örneklerdeki As(V)’in As(III)’e indirgenmesi ile
bulunmuştur. En uygun HCI, NaBH4 ve NaOH konsantrasyonları ile argon
gazı akış hızı deneysel olarak belirlenmiştir. Gözlenebilme sınırı : (3s) 0,62
µg L^-1 ve bağıl standart sapma (RSD):  2.9 % (n=11) olarak bulunmuştur. Önerilen
metodun doğruluğu, standart referans madde (NIST CRM 1643e)  analizi ile değerlendirilmiştir.  Metot değişik su örneklerinde arsenik
türlemesi için uygulanmıştır. Bu araştırma, Muğla ilinde sularda inorganik
arsenik belirlenmesi için öncü bir çalışma olarak kabul edilebilir.

Keywords

Arsenik tayini, HG-AAS, türleşme, su toksisite

ASSESSING OF AS(III) AND TOTAL INORGANIC ARSENIC (IAS) IN WATER SAMPLES COLLECTED FROM MUĞLA(TURKEY) PROVINCE USING HYDRIDE GENERATION-ATOMIC ABSORPTION SPECTROMETRY

Abstract

In this
study, simple and robust procedure was improved to directly assessing and
speciation of trace inorganic As(III) and As(V) using hydride generation-atomic
absorption spectrometry (HG-AAS). The determination of total arsenic was
obtained by reduction of As(V) to As(III) using 0.30 % (w/v) ascorbic acid and
1.0 % (w/v) KI. The most appropriate values of HCI, NaBH4 and NaOH
concentrations and flow rate of argon gas were experimentally determined.  The detection limit(3s) was 0,62 µg L^-1
and relative standard deviation (RSD) was 2.9 % (n=11). The accuracy of the
proposed method was evaluated by analyzing the certified reference material
(NIST CRM 1643e) sample. The method was applied for arsenic speciation in
different water samples. This can be suggested to be a pioneer study carried
out on tracing inorganic arsenic in water samples collected from Muğla
province.

Keywords

Arsenic determination, HG-AAS, speciation, water toxicity

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