Speciation of Cr(III) and Cr(VI) in environmental samples by solid phase extraction on Ambersorb 563 resin

Determination of total chromium by flame atomic absorption spectrometry after coprecipitation by cerium (IV) hydroxide

“…The relative standard deviation was between 1.6 and 8.0% (Table 4). The analytical figures given above for the proposed coprecipitation of chromium are better or comparable with the data from some recent studies on determination of chromium species given in the literature (Narin et al 2006). …”

“…In Japan, the maximum tolerable concentration of chromium in wastewater is 500 μg l −1 and 50 μg l −1 for total chromium and chromium(VI), respectively. The European Community Directive for drinking water standards has put the limit of total chromium not exceeding 50 μg l −1 (Narin et al 2006). Therefore, the total chromium content is not an important criterion only for the control of industrial wastewaters, but also for the evaluating of pollution level of natural waters such as drinking, sea and river waters (Barrera et al 1998;Boughriet et al 1994;Marques et al 2000;Gardner and Ravencscroft 1996;Wattoo et al 2006).…”

Speciation of Cr(III) and Cr(VI) after column solid phase extraction on Amberlite XAD-2010

“…Due to the amounts of chelating agent is one of the important factor for the quantitative recoveries of analyte ions [28][29][30], the effects of the sodium diethildithiocarbamate (DDTC) amounts on the adsorption of Cr(VI) on the resin was investigated. The recoveries of Cr(VI) was <10%, when DDTC was not added to the solution.…”

Speciation of Cr(III) and Cr(VI) in Environmental Water Determined by Selective Separation and Preconcentration on the PBST-RSP

“…The methods for determination and speciation of chromium(III) and chromium(VI) species mainly selective techniques are solid phase extraction followed by instrumental analysis [5,8,9]. But porous nano-barium strontium titanate by reversed-phase suspension polymerization and sol-gel method (PBST-RSP) sorbents has not studied.…”