Arsenic detection

THE USE OF BIOSENSORS ON THE BASE OF E.coli FOR ARSENIC DETECTION IN ENVIRONMENT... 

Arsenic, detection of, 1043 Aryloxyacetic acids, 682 Asbestos-sodium silicate stoppers, 494 Aspirin, 996... 

Dai, X. and Compton, R. G. (2006), Detection of As(III) via oxidation to As(V) using platinum nanoparticle modified glassy carbon electrodes Arsenic detection without interference from copper. Analyst, 131(4) 516-521. 

The use of a high-resolution magnetic sector mass spectrometer, which can resolve the small difference in m/z for As" " at 74.922 from that of " °Ar Cl at 74.931, eliminates the chlorine interference. New collision-cell techniques, in which the atomized samples are mixed with a second gas (usually H2) in a reaction cell, also minimize this interference. Arsenic detection limits of a few ng have been reported in matrices containing 1,000 mg NaCl. The chlorine interference can also be avoided by preseparation using HG, GF, or chromatography. 

Higher sensitivity for the specific detection of arsenic can be achieved by an increase of make up flow. In correlation with literature the optimum flow rate was found to be 150-190 ml/min. Hydrogen was applied as reagent gas for arsenic detection since it supports the dissociation of organoarsenic compounds and the excitation. Furthermore it protects the surface of the discharge tube from deposition of arsenic. Optimum results were achieved with an hydrogen pressure between 280 and 350 kPa. 

The Taiwanese well samples also contained higher average concentrations of phosphorus and boron compared with the U.S. water samples (Fig. 3). Phosphorus has similar chemistry to arsenic and can interfere with arsenic detection and removal. The higher levels of boron may be of interest to health researchers, because boron strongly increases retention of phosphate species in the human body (10), and might be expected to impact metabolism and retention of chemically similar arsenate species as well. 

Dihydroterpineol pis-Pinane aromatics, oil fields 1,2-Butylene carbonate arsenate detection Ammonium molybdate (VI) arsenate determination Ammonium molybdate (VI) arsenic compound mfg. 

Arsenic trioxide arsenic detection, metals Hydrazine sulfate... 

Song Y, Swain GM (2007) Total inorganic arsenic detection in real water samples using anodic stripping voltammetry and a gold-coated diamond thin-film electrode. Anal Chim Acta 593 7-12... 

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