Speciation of Antimony ( IİI ) and Antimony ( V ) by Hydride Generation Atom Trapping Slotted Quartz Tu be Flame Atomic Absorption Spectrometry

Content Provider	Semantic Scholar
Author	İbraheim, M. A. Njie, Njaw Yiidirim, E. Senoi, F. Abdelaiah, M. H. Ataman, Osman Yavuz
Copyright Year	2014
Abstract	The temi speciation has often been used to indicate the analytical activity of identifying chemical species and measuring their distribution [1]. The speciation of antimony is important because its toxicity, its bioavaiiabüity and its reactivity depend on the oxidation state and also on the nature of the specific compounds. Antimony may form various inorganic and organic compounds; its inorganic compounds are more toxic than the organic forms. İnorganic antimony is mostly found in two oxidation states (Mi and V) in environmental sampies and toxicity of Sb(Ill) has been shown to be 10 times higher than that of Sb(V) J2j. The anaiysis of species requires a series of steps that inciude isoiation, concentration (if necessary), separation and determination. Hydride generation (HG) is a gas phase sample introductîon technique for atomic spectrometry and finds vvidespread appiication for determination of hydride-forming eiements. Chemical Hydride Generation involves the conversion of anaiyte in acidifled soiution, to its gaseous hydride by a reducing agent, mostly sodium tetrahydroborate, under ambient conditions. The advantages of hydride generation are increased transport efficiency and separation of anaiyte from the matrix [3], İn this study HG-SOT-AT-FAAS was used, HG has been used as the sample introduction technique whiie siotted quartz tube atom trapping (SQT-AT) with an air-acetylene flame atomizer [4, 5] has been used for detection. Anaiyte species were introduced through nebuiizer and trapped in SQT using a sample of 20.0 mL in 4.0 minutes. The trapped species were re-volatilized by introducing 30 pL of methylisobutylketone. The optimum conditions are 1.2% (m/v) NaBH4, 0.6% (v/v) HCL, 5 ml/min f!ow rate for both NaBH4 and acidified sample solution, and 150 mL/min Ar gas flow. The optimum conditions for pre-reduction of Sb(V) to Sb(iil) are 10% (w/v) potassium iodide (Kİ) and 1% (w/v) ascorbic acid. The iinear calibration piots for Sb(ill) and Sb(V) after reduction process are close to each other and the recovery values for reduced Sb species ranged from 92% to 103%.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://kimyakongreleri.org/AACD8/2012-45.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article