Comparison of three gas chromatography methods for the determination of slip agents in polyethylene films

  1. Garrido-López, A. 1
  2. Esquiu, V. 1
  3. Tena, M.T. 1
  1. 1 Universidad de La Rioja

    Universidad de La Rioja

    Logroño, España

    GRID grid.119021.a

Journal of Chromatography A

ISSN: 0021-9673

Year of publication: 2007

Volume: 1150

Issue: 1-2

Pages: 178-182

Type: Article

Export: RIS
DOI: 10.1016/j.chroma.2006.11.090 PMID: 17161408 SCOPUS: 2-s2.0-34247609707 WoS: 000247049200025 GOOGLE SCHOLAR


Cited by

  • Scopus Cited by: 15 (14-07-2021)

Journal Citation Reports

  • Year 2007
  • Journal Impact Factor: 3.641
  • Best Quartile: Q1
  • Area: BIOCHEMICAL RESEARCH METHODS Quartile: Q1 Rank in area: 14/60 (Ranking edition: SCIE)
  • Area: CHEMISTRY, ANALYTICAL Quartile: Q1 Rank in area: 5/70 (Ranking edition: SCIE)

SCImago Journal Rank

  • Year 2007
  • SJR Journal Impact: 1.859
  • Best Quartile: Q1
  • Area: Analytical Chemistry Quartile: Q1 Rank in area: 7/89
  • Area: Biochemistry Quartile: Q1 Rank in area: 56/328
  • Area: Organic Chemistry Quartile: Q1 Rank in area: 20/160
  • Area: Medicine (miscellaneous) Quartile: Q1 Rank in area: 117/2862


Polymers require the use of some slip agents, such as oleamide and erucamide, in order to reduce their friction coefficient and to make films easier to handle. In this communication, three analytical methods consisting in pressurized liquid extraction (PLE) and gas chromatography (GC) are used to determine oleamide and erucamide in polyethylene films. The sample was extracted with pure isopropanol (two times) at 105 °C for 16 min. Then, the liquid extract containing oleamide and erucamide was analyzed by GC and three different detection systems: flame ionization detector (FID), thermoionic selective detector (TSD) and ion-trap mass spectrometry detector (MSD). Oleamide and erucamide were separated using a 30 m × 0.25 mm (I.D.) 5% phenyl-95% dimethyl-polysiloxane capillary column in 12 min. The chromatographic methods were characterized and compared in terms of repeatability, linearity and sensitivity. The GC-FID and GC-TSD methods were linear up to about 60 μg ml-1, whereas the linear range for the GC-MSD method was shorter, from 20.5 to 42 μg ml-1. LODs identified with GC-MSD were two times higher than those identified with the other two methods. Repeatability values (expressed as relative standard deviation) of less than 2.5% were found for FID and TSD but they were above 10% for MSD. Finally, each method was applied to determine the content of erucamide and oleamide in several polyethylene films and the results obtained were compared with those obtained from the nitrogen content measured by pyrolisis and gas-phase chemiluminescence. No significant differences were observed between the results of the methods. © 2006 Elsevier B.V. All rights reserved.