Determination of silicon in Japanese iron reference standard materials by reactor fast neutron activation analysis combined with a simple pre-concentration

A reactor fast neutron activation analysis was used in combination with a s imple pre-concentration procedure for determining silicon in some iron refe rence standard materials of Japan Iron and Steel Federation. The samples we re dissolved with aqua regia and digested with perchloric or sulfuric acid. The precipitated silica was collected on a filter paper and irradiated in a cadmium case with reactor fast neutrons. Silicon can be determined in too l steel SKD6, low-alloy steel Nos 2 and 4 and silico-manganese samples by a present method measuring 1.273.4 keV gamma -rays from 6.63-minute Al-29 pr oduced by Si-29(n,p)(29) Al reaction.