Accurate determination of platinum content in nickel-platinum alloy. It is an important index in material balance inspection and trade. In the past, diluted Inductively coupled plasma atomic emission spectroscopy were used, but the dilution process of this method is easy to introduce error. Yttrium internal standard measurement control. The sample was dissolved by hydrochloric acid and nitric acid, in 15% hydrochloric acid medium. The method of Accurate determination of platinum content in Ni-Pt alloy target by ICP-AES is established. the influencing factors, including the line selection, effect of matrix nickel, instrument determination conditions, were been experimented. The detection limits (μg/mL) of the method were 0.029 for (Pt 204.937), 0.046 for (Pt 299.797), 0.035 for (Pt 265.945). The determination levels of the platinum in the range from 1.00% to 15.00%. The standard recoveries are from 99.1% to 101.6%, RSD<1%. The method is accurate, fast and simple. The results were in good agreement with those obtained by Titrimetric determination. |