摘要
采用干法灰化技术对润滑油样品进行处理,制备润滑油样品水相测定溶液。用原子吸收光谱法对润滑油样品中的铁、铜、镍、镁进行测定,并对测定过程中共存元素的干扰进行研究。结果表明,硅元素在一定浓度范围内,对同浓度的铁、镁存在不同程度的干扰,采用加镧抑制剂的方法可消除干扰。精密度和准确度对比试验结果表明,相对标准偏差均小于5%,各元素的回收率均在96%～105%之间。
To determine the contents of iron, copper, nickel and magnesium in lubricating oil, tube oil samples were treated by dry ashing method and then dissolved in water to be tested by atomic absorption spectrometry. The interference of coexisting elements, silicon and etc. ,was investigated. Results showed that in certain concentration range the interference of silicon to the determination of iron and magnesium happened,yet it could be eliminated by the addition of lanthanum-based inhibitor. Test results for preci sion and accuracy showed that the relative standard deviations for these four tested elements were all less than 5% ,and the recovery rates of individual elements were in the range of 96 %--105%.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2011年第11期81-84,共4页
Petroleum Processing and Petrochemicals
关键词
原子吸收光谱法
润滑油
铁
铜
镍
镁
atomic absorption spectrometry
lubricating oil
iron
copper
nickel
magnesium
