- Determination of cerium in silicate rocks by electrothermal atomization in a furnace lined with tantalum foil Application to 19 international geological reference materials.
Determination of cerium in silicate rocks by electrothermal atomization in a furnace lined with tantalum foil Application to 19 international geological reference materials.
Talanta (1984-12-01)
J G Sen Gupta
PMID18963724
摘要
A 40-fold increase in sensitivity obtained by using a tantalum foil lining in a pyrolytically-coated graphite furnace permitted determination of low ppm levels of cerium in most silicate rocks. A preliminary preconcentration by oxalate and hydroxide co-precipitations was used before determination by use of a Varian GTA-95 atomizer coupled with an AA-475 spectrometer. The results for 3 synthetic and 19 international reference materials, including 4 new Canadian iron-formation reference materials, showed good recovery and satisfactory agreement with other published values.
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钽, foil, 50x50mm, thickness 0.5mm, annealed, 99.9%
钽, foil, 100x100mm, thickness 1.0mm, annealed, 99.9%
钽, foil, 100x100mm, thickness 0.25mm, annealed, 99.9%
钽, foil, light tested, 150x150mm, thickness 0.05mm, annealed, 99.9%
钽, foil, 100x100mm, thickness 0.100mm, annealed, 99.9%
钽, foil, 100x100mm, thickness 0.125mm, annealed, 99.9%
钽, foil, 50x50mm, thickness 6.0mm, 99.9%
钽, foil, light tested, 100x100mm, thickness 0.025mm, as rolled, 99.9%
钽, foil, 150x150mm, thickness 0.100mm, annealed, 99.9%
钽, foil, light tested, 100x100mm, thickness 0.03mm, as rolled, 99.9%
钽, foil, light tested, 100x100mm, thickness 0.05mm, annealed, 99.9%
钽, foil, light tested, 25x25mm, thickness 0.034mm, as rolled, 99.9%
钽, foil, not light tested, 25x25mm, thickness 0.0075mm, 99.9%
钽, foil, 25x25mm, thickness 1.0mm, annealed, 99.9%
钽, foil, 4mm disks, thickness 0.075mm, annealed, 99.9%
钽, foil, light tested, 25x25mm, thickness 0.025mm, as rolled, 99.9%
钽, foil, not light tested, 25x25mm, thickness 0.006mm, 99.9%
钽, foil, not light tested, 25x25mm, thickness 0.01mm, 99.9%
钽, foil, 25x25mm, thickness 0.5mm, annealed, 99.9%
钽, foil, 25x25mm, thickness 0.5mm, annealed, 99.99%
钽, foil, light tested, 50x50mm, thickness 0.01mm, 99.9%
钽, foil, 6mm disks, thickness 0.25mm, annealed, 99.9%
钽, foil, 8mm disks, thickness 0.006mm, 99.9%
钽, foil, light tested, 25x25mm, thickness 0.009mm, 99.9%
钽, foil, light tested, 25x25mm, thickness 0.03mm, as rolled, 99.9%
钽, foil, light tested, 25x25mm, thickness 0.05mm, annealed, 99.9%
钽, foil, light tested, 50x50mm, thickness 0.034mm, as rolled, 99.9%
钽, foil, light tested, 50x50mm, thickness 0.03mm, as rolled, 99.9%
钽, foil, light tested, 50x50mm, thickness 0.05mm, annealed, 99.9%
钽, foil, not light tested, 50x50mm, thickness 0.005mm, 99.9%