1.1 ,This test method applies to the determination of carbon in refractory and reactive metals and their alloys in quantities from 20 ,μ,g to 500 ,μ,g. This corresponds to mass fractions ranging from 0.004 ,wt ,% to 0.100 ,wt ,% for a 0.5 ,g sample (see Note 1).
Note 1: ,Actual quantitative range might vary from manufacturer to manufacturer and according to sample mass. Samples of higher mass may allow for proportionally lower detection limits provided complete combustion of the sample is assured.