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Determination of molybdenum in environmental samples.

Determination of molybdenum in environmental samples.

Analytica chimica acta (2007-04-10)

Krystyna Pyrzynska

摘要

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.

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Sigma-Aldrich

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

Sigma-Aldrich

钼, foil, thickness 0.025 mm, ≥99.9% trace metals basis

Sigma-Aldrich

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

Sigma-Aldrich

钼, powder, 1-5 μm, ≥99.9% trace metals basis

Sigma-Aldrich

钼, foil, thickness 0.1 mm, ≥99.9% trace metals basis

Sigma-Aldrich

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

Sigma-Aldrich

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

Sigma-Aldrich

钼, wire, diam. 1.0 mm, 99.95% trace metals basis

Sigma-Aldrich

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

钼, foil, 15mm disks, thickness 0.005mm, 99.9%

钼, mesh, 100x100mm, nominal aperture 0.44mm, wire diameter 0.07mm, 50 wires/inch, open area 67%, plain weave mesh

钼, wire, straight, 1000mm, diameter 0.5mm, 99.95%

钼, pellets, 200g, max. size 10mm, 99.9%

钼, pellets, 100g, max. size 10mm, 99.9%

钼, wire reel, 1000m, diameter 0.125mm, annealed, 99.95%

钼, rod, 50mm, diameter 5.0mm, 99.98%

钼, mesh, 150x150mm, nominal aperture 0.44mm, wire diameter 0.07mm, 50 wires/inch, open area 67%, plain weave mesh

钼, foil, 50x50mm, thickness 0.1mm, annealed, 99.9%

钼, foil, 25mm disks, thickness 0.0125mm, 99.9%

钼, tube, 500mm, outside diameter 2.0mm, inside diameter 1.3mm, wall thickness 0.35mm, 99.9%

钼, pellets, 50g, max. size 10mm, 99.9%

钼, wire, straight, 1000mm, diameter 0.25mm, 99.95%

钼, tube, 100mm, outside diameter 1.0mm, inside diameter 0.7mm, wall thickness 0.15mm, 99.9%

钼, foil, 100x100mm, thickness 0.1mm, annealed, 99.9%

钼, foil, 100x100mm, thickness 0.5mm, annealed, 99.9%

钼, foil, 0.5m coil, thickness 0.05mm, annealed, 99.9%

钼, wire reel, 1000m, diameter 0.035mm, as drawn, 99.95%

钼, rod, 150mm, diameter 5.0mm, 99.98%

钼, rod, 100mm, diameter 2.0mm, centerless ground, 99.9%

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