A reliable and ultrasensitive voltammetric method for the determination of molybdenum |
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| Authors: | J Pelzer F Scholz G Henrion and P Heininger |
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| Institution: | (1) Institut für Wasserwirtschaft, Berlin, German Democratic Republic;(2) Humboldt-Universität Berlin, Wissenschaftsbereich Analytik, Hessische Strasse 1-2, DDR-Berlin 1040, German Democratic Republic |
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| Abstract: | Summary The determination of molybdenum(VI) in aquatic media by polarography, voltammetry and adsorptive stripping voltammetry using the formation of a Mo-chlorate-mandalic acid complex at +100 mV (SCE) is described. The 3 sblank-detection limit is 0.1 nmol/l with differential pulse adsorptive stripping voltammetry (DPAdsSV, catalytic current). The calibration graphs are linear up to 200 nmol/l for the latter, 400 nmol/l for staircase voltammetry without accumulation time and 1 mg/l for staircase polarography. The accuracy of the DPAdsSV method was checked by analysis of a standard reference water material. The utility of differential pulse voltammetry was tested in different aquatic media, e.g., tap water, ground water, surface water.
Eine zuverlässige und äußerst empfindliche Methode zur Bestimmung von Molybdän |
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