Determination of Some Heavy Metals in Real Samples by FAAS after Preconcentration on 4-Nitro-2-(2-nitro-phenelazo)phenol Modified Activated Carbon

Autor:	Amir Sarrafi, Azadeh Khanmohammadi, Elahe Konoz
Rok vydání:	2012
Předmět:	Chromatography Chemistry Elution General Medicine Atomic spectroscopy chemistry.chemical_compound Adsorption Column chromatography Nitric acid Nitro medicine Phenol Activated carbon medicine.drug
Zdroj:	Chemical Science Transactions. 1:530-537
ISSN:	2278-3318 2278-3458
Popis:	A sensitive and simple method for determination of some heavy metals by flame atomic spectrometry after simultaneous preconcentration of trace heavy metals ions in some cereal and vegetable samples has been reported. The method is based on the adsorption of Cu 2+ , Fe 2+ , Zn 2+ and Pb 2+ on 4-nitro-2-(2-nitro-phenelazo)phenol (NNPP) loaded on activated carbon (AC). The adsorbed metals on activated carbon were eluted using 3 mL 4 mol L -1 nitric acid. The influences of the analytical parameters including pH, flow rate of sample and eluent, type and concentration of eluent, amount of adsorbent and sample volume were investigated. The recoveries of analytes were generally higher than 95%.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4c154078e412c45f468fc9b53c961ba7 https://doi.org/10.7598/cst2012.168 Zobrazit plný text záznamu