Atomization Characteristic of Chromium on a Molybdenum Tube Atomizer by Electrothermal Atomic Absorption Spectrometry and Determination of Chromium in Biological Materials

Determination of chromium in river waters by electrothermal atomic absorption spectrometry with preconcentration on a tantalum wire

“…It has been reported in a previous paper [13] that the optimal purge gas on ETAAS with a tungsten tube atomizer was Ar 480 mL min -1 +H 2 20 mL min -1 to protect the metal atomizer from oxidation by residual traces of oxygen in the atomizer chamber, the optimal atomization temperature was 2240°C, and a pyrolysis temperature of 750°C was necessary to obtain a sensitive AA signal. Therefore, the subsequent experiments with the preconcentration of tantalum wire adsorption were performed under these experimental conditions.…”

“…The wire was taken out and washed with water. After inserting into the metal tube atomizer, the wire was heated at 100°C for 10 s, 750°C for 10 s and 2240°C for 3 s. During the atomization step, the heating rate was 6.3°C ms -1 [13]. To minimize contamination problems by foreign elements, plastic vessels were used in the study.…”

“…Interferences by some matrix elements in the determination of chromium by ETAAS have been observed [13]. Therefore, the effect on the preconcentration of chromium by large amounts of contaminants was evaluated.…”

The determination of hexavalent chromium (Cr6+) in electronic and electrical components and products to comply with RoHS regulations

“…In recent years, experimental procedures have been significantly improved with developments of spectrophotometric and chromatographic technologies such as on-line atomic absorption spectrometry (AAS) [10], inductively coupled plasmaatomic emission spectrometry (ICP-AES), ICP-mass spectrometry (ICP-MS) and ion chromatography (IC), etc. applied to determine such a hazardous substance [11][12][13]. However, these procedures still suffer interferences from other ions and coexisting organic substances.…”

A novel terbium composite nanoparticles: Preparation and selective fluorescence determination of chromium(VI)

“…The trivalent Cr is nontoxic and relatively immobile in nature, whereas the hexavalent Cr which is known to be toxic with potential carcinogenic effects [1] is readily soluble in water, highly toxic and mobile. Concerning about the presence of hexavalent Cr in the environment resulted in the development of numerous analytical techniques for the determination of Cr(VI) in different sample matrices, such as the flow injection analysis [2][3][4], atomic absorption spectrometry [5][6][7][8], on-line selective determination of both species by chromatography [9][10][11][12][13], mass spectrometry [14][15][16], voltammetry [17,18] and solvent extraction which is still one of the most widely used methods for separation and preconcentration [19]. Though these methods have high selectivity and sensitivity, they are somewhat complex, costly, and time consuming.…”