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  • 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
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, 10mm disks, thickness 0.05mm, annealed, 99.9%
钽, foil, 10mm disks, thickness 0.075mm, annealed, 99.9%
钽, foil, 10mm disks, thickness 0.100mm, annealed, 99.9%
钽, foil, 10mm disks, thickness 0.125mm, annealed, 99.9%
钽, foil, 10mm disks, thickness 0.15mm, annealed, 99.9%
钽, foil, 10mm disks, thickness 0.20mm, annealed, 99.9%
钽, foil, 10mm disks, thickness 0.25mm, annealed, 99.9%
钽, foil, 10mm disks, thickness 0.25mm, annealed, 99.99%
钽, foil, 10mm disks, thickness 0.5mm, annealed, 99.9%
钽, foil, 10mm disks, thickness 0.75mm, annealed, 99.9%
钽, foil, 15mm disks, thickness 0.006mm, 99.9%
钽, foil, 15mm disks, thickness 0.0075mm, 99.9%
钽, foil, 15mm disks, thickness 0.009mm, 99.9%
钽, foil, 15mm disks, thickness 0.0125mm, 99.9%
钽, foil, 15mm disks, thickness 0.015mm, 99.9%
钽, foil, 15mm disks, thickness 0.01mm, 99.9%
钽, foil, 15mm disks, thickness 0.025mm, as rolled, 99.9%
钽, foil, 15mm disks, thickness 0.02mm, 99.9%
钽, foil, 15mm disks, thickness 0.034mm, as rolled, 99.9%
钽, foil, 15mm disks, thickness 0.03mm, as rolled, 99.9%
钽, foil, 15mm disks, thickness 0.05mm, annealed, 99.9%
钽, foil, 15mm disks, thickness 0.075mm, annealed, 99.9%
钽, foil, 15mm disks, thickness 0.100mm, annealed, 99.9%
钽, foil, 15mm disks, thickness 0.125mm, annealed, 99.9%
钽, foil, 15mm disks, thickness 0.15mm, annealed, 99.9%
钽, foil, 15mm disks, thickness 0.20mm, annealed, 99.9%
钽, foil, 15mm disks, thickness 0.25mm, annealed, 99.9%
钽, foil, 15mm disks, thickness 0.25mm, annealed, 99.99%
钽, foil, 15mm disks, thickness 0.5mm, annealed, 99.9%
钽, foil, 15mm disks, thickness 0.75mm, annealed, 99.9%

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