Details

Autor(en) / Beteiligte

• Bartyzel, Agata
• Cukrowska, Ewa M.

Titel

Solid phase extraction method for the separation and determination of chromium(III) in the presence of chromium(VI) using silica gel modified by N,N′-bis-(α-methylsalicylidene)-2,2-dimethyl-1,3-propanediimine

Ist Teil von

• Analytica chimica acta, 2011-11, Vol.707 (1), p.204-209

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2011

Quelle

MEDLINE

Beschreibungen/Notizen

• [Display omitted] ► New SPE method for Cr(III) separation/preconcentration was described. ► Silica gel modified with Schiff base was used as adsorbent. ► Conditions for quantitative preconcentration, elution and GFAAS determination were studied. ► The method can be applied to the highly saline samples. ► This method is a simple, effective, accurate and reproducible. N,N′-bis-(α-methylsalicylidene)-2,2-dimethyl-1,3-propanediimine (SBTD) modified silica gel was prepared and used as sorbent for solid phase extraction of Cr(III) ions from aqueous solution. This sorbent showed a high sorption affinity for Cr(III) while recovery of Cr(VI) was very low. The analyte ion retained on the column was eluted with 1 mol L −1 HNO 3. The chromium ion in the eluent was determined by graphite furnace atomic absorption spectrometry. The effects of different parameters such as pH, eluent type and volume, Schiff's base concentration, sample and eluent flow rate, interfering ions and adsorbent amount were investigated.