- 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
ABSTRACT
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.
MATERIALS
Product Number
Brand
Product Description
Tantalum, foil, 2m coil, thickness 0.04mm, coil width .65mm, as rolled, 99.9%
Tantalum, foil, 8mm disks, thickness 0.0075mm, 99.9%
Tantalum, foil, 6mm disks, thickness 0.009mm, 99.9%
Tantalum, foil, 4mm disks, thickness 0.75mm, annealed, 99.9%
Tantalum, foil, 1m coil, thickness 0.1mm, coil width .62mm, as rolled, 99.9%
Tantalum, foil, 50mm disks, thickness 0.034mm, as rolled, 99.9%
Tantalum, foil, 6mm disks, thickness 0.100mm, annealed, 99.9%
Tantalum, foil, 6mm disks, thickness 0.0125mm, 99.9%
Tantalum, foil, 50mm disks, thickness 0.075mm, annealed, 99.9%
Tantalum, foil, 15mm disks, thickness 0.75mm, annealed, 99.9%
Tantalum, foil, 8mm disks, thickness 0.25mm, annealed, 99.99%
Tantalum, foil, 6mm disks, thickness 0.5mm, annealed, 99.9%
Tantalum, foil, 4mm disks, thickness 0.25mm, annealed, 99.9%
Tantalum, foil, light tested, 100x100mm, thickness 0.025mm, as rolled, 99.9%
Tantalum, foil, light tested, 50x50mm, thickness 0.034mm, as rolled, 99.9%
Tantalum, foil, light tested, 25x25mm, thickness 0.004mm, 99.9%
Tantalum, foil, not light tested, 100x100mm, thickness 0.01mm, 99.9%
Tantalum, foil, light tested, 25x25mm, thickness 0.003mm, 99.9%
Tantalum, foil, not light tested, 25x25mm, thickness 0.0015mm, 99.9%
Tantalum, foil, light tested, 50x50mm, thickness 0.075mm, annealed, 99.9%
Tantalum, foil, 6mm disks, thickness 0.015mm, 99.9%
Tantalum, foil, 50mm disks, thickness 0.03mm, as rolled, 99.9%
Tantalum, foil, not light tested, 25x25mm, thickness 0.0005mm, 99.9%
Tantalum, foil, light tested, 100x100mm, thickness 0.05mm, annealed, 99.9%
Tantalum, foil, not light tested, 50x50mm, thickness 0.01mm, 99.9%
Tantalum, foil, not light tested, 25x25mm, thickness 0.001mm, 99.9%
Tantalum, foil, not light tested, 50x50mm, thickness 0.0015mm, 99.9%
Tantalum, foil, light tested, 50x50mm, thickness 0.0075mm, 99.9%
Tantalum, foil, not light tested, 25x25mm, thickness 0.01mm, 99.9%
Tantalum, foil, not light tested, 82x100mm, thickness 0.006mm, 99.9%