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Determination of molybdenum in environmental samples.

Determination of molybdenum in environmental samples.

Analytica chimica acta (2007-04-10)

Krystyna Pyrzynska

ABSTRACT

Determination of molybdenum in different kinds of environmental samples is often a challenging task for analysts. Its concentration is usually very low and the sample matrix may cause serious interferences during measurement. Therefore, preconcentration and separation methods should be used to solve these problems and render more sensitive, accurate and interference-free determination. Recent developments in sample treatment, such as solid phase and liquid-liquid extraction as well as coprecipitation are presented, including flow-based methodology. In addition, important extension and improvements in analytical methods for determinations of molybdenum are updated. Some examples of speciation analysis are also presented.

MATERIALS

Product Number

Brand

Product Description

Sigma-Aldrich

Molybdenum, nanopowder, <100 nm particle size (TEM), 99.8% trace metals basis

Sigma-Aldrich

Molybdenum, powder, <150 μm, 99.99% trace metals basis

Sigma-Aldrich

Molybdenum, powder, <150 μm, 99.9% trace metals basis

Sigma-Aldrich

Molybdenum, powder, 10 μm, ≥99.95% trace metals basis

Sigma-Aldrich

Molybdenum, foil, thickness 1.0 mm, ≥99.9% trace metals basis

Molybdenum, foil, 6mm disks, thickness 0.007mm, 99.9%

Molybdenum, foil, 6mm disks, thickness 0.025mm, annealed, 99.9%

Molybdenum, foil, 50mm disks, thickness 0.25mm, annealed, 99.9%

Molybdenum, foil, 6mm disks, thickness 0.03mm, annealed, 99.9%

Molybdenum, foil, 6mm disks, thickness 0.0125mm, 99.9%

Molybdenum, foil, 6mm disks, thickness 0.15mm, annealed, 99.9%

Molybdenum, foil, 50mm disks, thickness 0.30mm, annealed, 99.9%

Molybdenum, foil, 6mm disks, thickness 0.015mm, annealed, 99.9%

Molybdenum, rod, 500mm, diameter 1.25mm, centerless ground, 99.9%

Molybdenum, rod, 100mm, diameter 6.0mm, centerless ground, 99.9%

Molybdenum, rod, 500mm, diameter 1.5mm, centerless ground, 99.9%

Molybdenum, wire reel, 10m, diameter 0.01mm, hard, 99.8+%

Molybdenum, foil, 50x50mm, thickness 2.0mm, annealed, 99.9%

Molybdenum, wire reel, 5m, diameter 1.0mm, annealed, 99.95%

Molybdenum, wire reel, 5m, diameter 0.025mm, hard, 99.95%

Molybdenum, foil, 100x100mm, thickness 0.25mm, annealed, polished on both sides, 99.9%

Molybdenum, wire reel, 50m, diameter 0.2mm, as drawn, 99.95%

Molybdenum, foil, 0.2m coil, thickness 0.008mm, 99.9%

Molybdenum, foil, 150x150mm, thickness 0.125mm, annealed, 99.9%

Molybdenum, wire reel, 25m, diameter 1.25mm, annealed, 99.95%

Molybdenum, wire reel, 50m, diameter 0.5mm, annealed, 99.95%

Molybdenum, wire reel, 2000m, diameter 0.035mm, as drawn, 99.95%

Molybdenum, wire reel, 50m, diameter 0.025mm, hard, 99.95%

Molybdenum, wire reel, 5m, diameter 0.035mm, as drawn, 99.95%

Molybdenum, foil, not light tested, 25x25mm, thickness 0.005mm, 99.9%