提出了用X射线荧光光谱法测定铝合金中镁、硅、钛、锰、铁、镍、铜、锌、铅等9种元素。样品0.200 0 g置于聚四氟乙烯杯中用200 g·L-1氢氧化钠溶液5 mL溶解后,加硝酸10 mL酸化,将溶液移入已盛有4.000 g熔剂(四硼酸锂、偏硼酸锂与氟化锂以4.5比1比0.4的质量比混合)的铂金坩埚中,低温蒸干,并加热熔融制成厚度为2.5 mm的玻璃状熔片,供X射线荧光光谱法分析用。该方法可适用于不同牌号、不同铸造或锻造热处理状态的铝合金样品分析。按该方法分析了4个标准样品,其测定结果与标准值相吻合。用一个铝合金标准物质(牌号ZLD 108)制备10个样片并测量,各元素相对标准偏差在0.62%~2.7%之间。

Nine elements, i.e., Mg, Si, Ti, Mn, Fe, Ni, Cu, Zn and Pb in aluminum alloys of different denominations or of different conditions of heat treatment (i.e., either casting or forging) were determined by XRFS. 0.2000 g of the alloy was dissolved in 5 mL of 200 g·L-1 NaOH solution in a PTFE beaker and acidified with 10 mL of conc. HNO3. The solution was mixed with 4.000 g of a flux containing lithium tetraborate, lithium metaborate and lithium fluoride (mixed in the ratio of 4.5 to 1 to 0.4 by mass) in a Pt-Au-crucible. The mixture was evaporated to dryness and finally fused on a Meker Burner to form a glassy melt of 2.5 mm in thickness, which was used for XRFS analysis. Four standard samples of aluminum alloy were analyzed by the proposed method, giving results in consistency with the standard values. Precision was tested with a standard sample for 10 separate determinations, values of RSD′s found for the 9 elements were ranged from 0.62% to 2.7%.