Determination of Ultra Trace Amounts of Silver by GFAAS after DLLME Method in Water, Plasma and Urine

Autor:	Siavash Hasanvandi, Sajjd Heidary Fathabad
Rok vydání:	2012
Předmět:	Detection limit Chromatography Calibration curve Chemistry Inorganic chemistry Extraction (chemistry) General Chemistry Food chemistry Mass spectrometry Biochemistry Solvent FLUIDEX Drug Discovery Environmental Chemistry Graphite furnace atomic absorption
Zdroj:	Oriental Journal Of Chemistry. 28:1311-1319
ISSN:	2231-5039 0970-020X
Popis:	This paper is devoted to an investigation carried out on a simple, rapid and sensitive method, which is proposed for selective determination of ultra trace amounts of silver from water and biological samples. The method is based on highly efficient separation and pre-concentration of silver by dispersive liquid-liquid microextraction (DLLME) and determination with graphite furnace atomic absorption spectrometry (GFAAS). 1-(2-pyridylazo)-2-naphtol (PAN) was used as a silver chelating agent prior to extraction. Parameters such as type and volume of extraction solvent, type and volume of dispersive solvent, pH, extraction time and concentration of the chelating agent have been optimized. Liner range of calibration curve, detection limit and relative standard deviation were 0.2-6.0 ng mL -1 , 0.02 ng mL -1 and 4.4 C/o, respectively. Silver determined successfully with this method in real samples.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6b872b49d27908d37151f4f7fd80848c https://doi.org/10.13005/ojc/280329 Zobrazit plný text záznamu