Determination of N-Methyl-2-pyrrolidone Residue in Lubricating Oil by Gas Chromatography-Mass Spectrometry

WANG Yu-xia; ZHANG Wei-ya; CHEN Xiang-yang; LI Cheng-fa; CHEN Guo-feng

doi:10.12452/j.fxcsxb.24121717

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Determination of N-Methyl-2-pyrrolidone Residue in Lubricating Oil by Gas Chromatography-Mass Spectrometry

Scientific Papers | 更新时间：2025-03-17

- Determination of N-Methyl-2-pyrrolidone Residue in Lubricating Oil by Gas Chromatography-Mass Spectrometry
- Journal of Instrumental Analysis Vol. 44, Issue 3, Pages: 486-492(2025)
- 作者机构：
  
  深圳海关工业品检测技术中心，广东深圳 518067
- 作者简介：
- 基金信息：
- DOI：10.12452/j.fxcsxb.24121717
  CLC： O657.7;U473.6
- Received：17 December 2024，
  
  Revised：14 January 2025，
  
  Accepted：2025-01-15，
  
  Published：15 March 2025
- 稿件说明：
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王昱霞,张伟亚,陈向阳,李成发,陈国峰.气相色谱-质谱联用法测定润滑油中N-甲基吡咯烷酮残留量[J].分析测试学报,2025,44(03):486-492.

WANG Yu-xia,ZHANG Wei-ya,CHEN Xiang-yang,LI Cheng-fa,CHEN Guo-feng.Determination of N-Methyl-2-pyrrolidone Residue in Lubricating Oil by Gas Chromatography-Mass Spectrometry[J].Journal of Instrumental Analysis,2025,44(03):486-492.
王昱霞,张伟亚,陈向阳,李成发,陈国峰.气相色谱-质谱联用法测定润滑油中N-甲基吡咯烷酮残留量[J].分析测试学报,2025,44(03):486-492. DOI： 10.12452/j.fxcsxb.24121717.

WANG Yu-xia,ZHANG Wei-ya,CHEN Xiang-yang,LI Cheng-fa,CHEN Guo-feng.Determination of N-Methyl-2-pyrrolidone Residue in Lubricating Oil by Gas Chromatography-Mass Spectrometry[J].Journal of Instrumental Analysis,2025,44(03):486-492. DOI： 10.12452/j.fxcsxb.24121717.

摘要

建立了气相色谱-质谱联用（GC-MS）测定润滑油中N-甲基吡咯烷酮（NMP）残留量的方法。润滑油样品采用叔丁基甲醚溶解，加入乙腈将润滑油沉淀，目标物N-甲基吡咯烷酮保留在上清液中。采用气相色谱-质谱法测定上清液，外标法定量。结果表明，N-甲基吡咯烷酮在0.5~50.0 mg/L范围内线性关系良好，方法检出限为8.0 mg/kg，定量下限为20.0 mg/kg。在20、100、200 mg/kg 3个加标水平下，不同种类润滑油中N-甲基吡咯烷酮的回收率为96.2%~108%，相对标准偏差（RSD）为0.99%~4.5%。该方法简单快速、灵敏度高、准确度好，可应用于润滑油中N-甲基吡咯烷酮的测定。

Abstract

A method for the determination of N-methyl-2-pyrrolidone（NMP） residues in lubricating oil using gas chromatography-mass spectrometry（GC-MS） has been established. Lubricating oil samples were dissolved in tert-butyl methyl ether，and then precipitated by adding acetonitrile. The target substance NMP was retained in the supernatant and determined by gas chromatography-mass spectrometry with external standard method for quantification. Results showed that NMP had a good linear relationship in the range of 0.5 mg/L to 50.0 mg/L，the detection limit was 8.0 mg/kg，and the quantitation limit was 20.0 mg/kg. At three spiked levels of 20 mg/kg，100 mg/kg and 200 mg/kg，the recoveries of NMP in different types of lubricating oils were between 96.2% and 108%，with relative standard deviations（RSDs） ranging from 0.99% to 4.5%. The method is quick，easy，accurate and sensitive，which is suitable for determination of NMP in lubricating oil.

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references

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