X射线荧光光谱法测定润滑油中22种添加剂元素和磨损金属元素

XRFS Determination of 22 Elements (Additive or Worn Metals) in Lubricant Oil

提出了X射线荧光光谱法测定润滑油中钙、锌、磷、镁、钡、锑、铜、铁、铝、铬、锰、钛、镍、锡、镉、铅、钒、钼、银、硅、钾和钠等22种添加剂元素和磨损金属元素的方法。将理论α影响系数法与经验系数法相结合校正基体效应。以2009年度RoundRobin比对样品作为未知样,按此方法进行测定,所得结果与已知值相符,也与电感耦合等离子体原子发射光谱法直接测定的结果一致。22元素的检出限在0.3～9.5μg.g-1之间,各元素测定值的相对标准偏差(n=7)在0.2%～11.1%之间。

Twenty two elements present as additives or worn metals in lubricant oil were determined by XRFS. The methods of theoretical α coefficient and empirical coefficient were used for correction of matrix effect. Round Robin reference samples of lubricant oil of the year 2009 were analyzed as unknown samples by the present method, giving results in consistency with both the known values, and the values found by ICP-AES. Values of detection limits of the 22 elements were ranged from 0. 3 to 9. 5μg·g-1. Values of RSD＇s （n=7） found for these elements were in the range from 0. 2% to 11.1%.