IP 470: Determination of aluminium, silicon, vanadium, nickel, iron, calcium, zinc and sodium in residual fuel oil by ashing, fusion and atomic absorption spectrometry

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  • Method adopted/last revised: 2005
  • Method reapproved: None
  • REF/ISBN: IP470-2934869
  • Status: Current
  • First printed in STM books: January 2005

Scope

This standard specifies a procedure for the determination of aluminium, silicon, vanadium, nickel, iron, calcium, zinc and sodium in residual fuel oils, at levels detailed in the table below, by atomic absorption spectrometry.

Element        Range mg/kg
Aluminium     5 to 150
Silicon          10 to 250
Vanadium     1 to 400
Nickel           1 to 100
Iron               2 to 60
Sodium         1 to 100
Calcium        3 to 100
Zinc              1 to 70

Aluminium and silicon are normally found in association with each other in residual fuels, and may be specified, separately or in combinaation, as an estimate of catalyst fines content.

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