Membrane filtration – atomic absorption spectrometry combination for copper, cobalt, cadmium, lead and chromium in environmental samples

Abstract

Cellulose nitrate membrane filter was used for the preconcentration-separation of Cu, Co, Cd, Pb and Cr ions. The analyte ions were collected on the membrane filter by the aid of carmine. Then membrane filter was dissolved by using nitric acid. The levels of the analytes in the final solutions were determined by flame atomic absorption spectrometry (FAAS). The analytical parameters including pH, amounts of carmine, sample volumes etc. have been optimized. No influences have been observed from the matrix ions. The detection limits for analytes were in the range of 0.08 microg/l-0.93 microg/l. The validation of the procedure was checked by the analysis of standard reference sediment (GBW 07309). The present method has been successfully applied for the FAAS determinations of analyte ions in real samples including black tea and magnesium salts.

Preparation and characterization of magnetic allylamine modified graphene oxide-poly(vinyl acetate-co-divinylbenzene) nanocomposite for vortex assisted magnetic solid phase extraction of some metal ions

“…They have received considerable intention of the scientist due to their venomous effects in human beings, and other living organisms even at trace levels [1][2][3][4][5][6]. Due to noxious effects of these heavy metals like kidney failure, liver damage, cancer, nausea central nervous system, high blood pressure, pulmonary fibrosis, skin dermatitis, renal edema, diarrhea and vomiting, spectroscopic methods for determination of trace and ultratrace level of these metals in water, food and biological samples have become of challenging research area for analytical chemists [1,[7][8][9][10][11].…”

Solid-phase extraction of Fe(III), Pb(II) and Cr(III) in environmental samples on amberlite XAD-7 and their determinations by flame atomic absorption spectrometry

“…The method presented in this study is most promising for the analyte ions as the preconcentration factor is 60. The preconcentration factor achieved with presented procedure is superior to some solidphase extraction methods given in literature [38][39][40][41][42][43][44][45]. The elution was easily performed with 1 mol L −1 HCl.…”

Determination of ultra-trace amounts of cadmium by ET-AAS after column preconcentration with a new sorbent of modified MWCNTs

“…SPE technique has become increasingly popular because of its advantages of high enrichment factor, high recovery, rapid phase separation, economical, low consumption of organic solvents, suitability for automation, and the ability of combination with different detection techniques in the form of on-line or off-line mode (Liang et al 2008;Fritz 1999). Various sorbents, including activated carbon (Ghaedi et al 2011), alumina (Mahmoud et al 2010, activated clay (Bhattacharyya and Gupta 2011), polymeric supports (Demirel et al 2003), cellulosic derivatives (Soylak et al 2006), modified silica gel (Bozkurt and Merdivan 2009), resins (Jiao and Gao 2012), naphthalene (dos Anjos et al 2007), zeolites (Baker et al 2008), modified octadecylsilica membrane disk (Ashkenani et al 2009), and some other solid substances, have been used for the separation and preconcentration of trace amounts of metal ions from environmental samples. In recent years, modified nanomaterials such as modified carbon nanotubes (CNTs) have been proposed as a novel solid-phase extractant for various inorganic and organic compounds/elements at trace levels (Dong et al 2009;Mobasherpour et al 2011).…”