Optimization of an anion-exchange high performance liquid chromatography-inductively coupled plasma-mass spectrometric method for the speciation analysis of oxyanion-forming metals and metalloids in leachates from cement-based materials

Study on multielemental speciation analysis of Cr(VI), As(III) and As(V) in water by advanced hyphenated technique HPLC/ICP-DRC-MS. Fast and reliable procedures

“…Mulugeta et al designed the analytical procedure that allows for the multielemental speciation of As(III) As(V), Cr(VI), Sb (III) and Sb(V) in the leachates from a cement-based materials. In case of Cr(VI), they achieved a relatively high value of L D -2.2 mg L À 1 , as a result of monitoring the less-abundant chromium isotope 53 Cr [20]. Similar L D value for the same isotope was obtained by Roig-Navarro et al -5.5 mg L À 1 .…”

“…Applying these procedures, relatively low retention times for all analytes were obtained, resulting in short total analysis time, which for procedure A was equal to 6 min and for procedure B was equal to 3 min. With regard to the literature, obtained analysis times are shorter than the previously published for multielemental analysis of As and Cr species by ion-exchange chromatography [5,8,14,16,20]. Fig.…”

“…In multielemental speciation determination of As and Cr species, mobile phases based on nitrate [8,14], nitrate and tartrate [20] or nitrate and phosphate [16] with or without methanol addition have frequently been applied for anion-exchange chromatography. In case of reversed-phase ion-pair chromatography, tetrabutylammonium hydroxide and ethylenediaminetetraacetic acid (di-potassium salt) are often used as a mobile phase components [15].…”

“…Organic solvents such as methanol or acetonitrile can be added to the mobile phase to improve the signal intensity of analytes [20]. The effect of the methanol addition on the intensity of As and Cr species signals was also examined.…”

“…Multielemental speciation studies, a successor of well-studied single element speciation, is recently gaining more attention despite difficulties resulting from chromatographic separation [5]. The following papers on the multielemental speciation in different matrices have been reported, for: As, Se [4,6,7]; As, Cr [5,[8][9][10]; As, Sb [11,12]; Cr, Se [13]; As, Se, Cr [14][15][16]; As, Sb, Se [17][18][19]; As, Se, Sb, Te [4]; As, Se, Cr, Mo [20]. The key issue in multielemental speciation analysis is the selection of such separation and determination conditions, which, for individual species of several elements, simultaneously ensure: (i) retention of each of the analytes on a chromatographic column and its elution in a reasonable analysis time; (ii) complete separation of analytical signals; (iii) symmetrical analytical signals; (iv) stability of the different species throughout the whole analytical procedure; (v) elimination of potential interferences; (vi) sufficiently low detection limits.…”