- 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, light tested, 100x100mm, thickness 0.03mm, as rolled, 99.9%
Tantalum, foil, light tested, 100x100mm, thickness 0.015mm, 99.9%
Tantalum, foil, not light tested, 25x25mm, thickness 0.004mm, 99.9%
Tantalum, foil, light tested, 150x300mm, thickness 0.075mm, annealed, 99.9%
Tantalum, foil, light tested, 25x25mm, thickness 0.02mm, 99.9%
Tantalum, foil, not light tested, 100x100mm, thickness 0.009mm, 99.9%
Tantalum, foil, 100x100mm, thickness 0.100mm, annealed, 99.9%
Tantalum, foil, 0.2m coil, thickness 0.01mm, 99.9%
Tantalum, foil, 50x50mm, thickness 0.25mm, annealed, 99.9%
Tantalum, foil, 50x50mm, thickness 4.0mm, annealed, 99.9%
Tantalum, foil, 0.5m coil, thickness 0.025mm, coil width 0.75mm, annealed, 99.9%
Tantalum, foil, 10m coil, thickness 0.025mm, coil width 0.75mm, annealed, 99.9%
Tantalum, foil, 50x50mm, thickness 0.5mm, annealed, 99.9%
Tantalum, foil, 100x100mm, thickness 0.20mm, annealed, 99.9%
Tantalum, foil, 10m coil, thickness 0.03mm, coil width 0.75mm, annealed, 99.9%
Tantalum, foil, 0.2m coil, thickness 0.1mm, coil width .62mm, as rolled, 99.9%
Tantalum, foil, 25x25mm, thickness 0.25mm, annealed, 99.99%
Tantalum, foil, 150x150mm, thickness 0.100mm, annealed, 99.9%
Tantalum, foil, 10m coil, thickness 0.04mm, coil width .65mm, as rolled, 99.9%
Tantalum, foil, 50x50mm, thickness 3.0mm, annealed, 99.9%
Tantalum, foil, 25x25mm, thickness 0.5mm, annealed, 99.9%
Tantalum, foil, 0.5m coil, thickness 0.03mm, coil width 0.75mm, annealed, 99.9%
Tantalum, foil, 0.1m coil, thickness 0.1mm, coil width .62mm, as rolled, 99.9%
Tantalum, foil, 0.5m coil, thickness 0.0075mm, 99.9%
Tantalum, foil, 25x25mm, thickness 0.15mm, annealed, 99.9%
Tantalum, foil, 50mm disks, thickness 0.03mm, as rolled, 99.9%
Tantalum, foil, 8mm disks, thickness 0.0075mm, 99.9%
Tantalum, foil, 6mm disks, thickness 0.009mm, 99.9%
Tantalum, foil, 25mm disks, thickness 0.0125mm, 99.9%
Tantalum, foil, 15mm disks, thickness 0.25mm, annealed, 99.99%