[Determination of cobalt concentration in hard alloy using laser-induced plasma spectroscopy]

The cobalt spectrum measurement was conducted with the experiment setup including a Nd : YAG Q-switched solid laser as the exciting light, and YG hard alloy as the sample. Experiments show that the 345. 35 nm sensitive spectral line intensity of Co in YG3 demonstrates a parabola trend with the increase in power density, and as the power density exceeds 1. 2 X 10(8) W x cm(-2), the spectrum intensity becomes stronger, and its deflection becomes less. The experiments on measuring Co concentration in YG hard alloy series show that the concentration of cobalt has a good linear relationship with its spectral intensity, the maximum relative error of measurement is 5. 08%, and the result is reliable with higher precision.