GB/T 223.78—2000.Methods for chemical analysis of iron , steel and alloy—Curcumin spectrophotometric method for the determination of boron content.
1范围
GB/T 223.78规定了姜黄素直接光度法测定钢中硼含量。
本方法适用于钢中0.000 5%(m/m)~~0.012%(m /m)及非合金钢中0.000 1% (m/m)~~0.000 5%( m / m)硼含量 ...
GB/T 223.14—2000.Methods for chemical analysis of iron ,steel and alloy The N-benzoy-N-phenylhydroxylamine extraction photometric method for the dctermination of vanadium content.
1范围
GB/T 223.14规定了用钮试剂萃取光度法测定钒含量的方法。
GB/T 223.14适用于钢铁及合金中0.005 0%(m / m)~~0.50%(m/m)钒 ...