Cited by 45Analytical chemistry methods developmentIonic liquids properties and applicationsAnalytical Chemistry and Chromatography

Ultrasound assisted ionic liquid dispersive liquid phase extraction of lovastatin and simvastatin: A new pretreatment procedure

Mao, Tao, Hao, Bo, He, Jin, Li, Weilin, Li, Shengqing, Yu, Ziniu·2009·Journal of Separation Science

Abstract

A fast and novel sample preparation procedure: ultrasound assisted ionic liquid (IL) dispersive liquid extraction for the concentration of lovastatin and simvastatin in aqueous samples was developed. An IL ([C(6)MIM][PF(6)]) was used as the extraction solvent, and the factors affecting the extraction efficiency such as initial temperature, the volume of IL, pH of water samples, cooling time, and salt concentration were optimized. In combination with HPLC-UV, both lovastatin and simvastatin exhibited a good linear range of 1-100 ng/mL. The limits of detection (LODs) of lovastatin and simvastatin were 0.17 and 0.29 ng/mL, respectively. Precisions of the proposed method (RSDs, n = 9) were 4.12 and 4.52%, respectively. This method has been successfully applied for the analysis of target compounds in three real water samples and good spiking recoveries were obtained in the range of 90.0-102.2% for lovastatin and 80.5-112.0% for simvastatin. These results indicated that ultrasound assisted IL dispersive liquid phase extraction would have good application prospect in the pretreatment of environmental samples.

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Crossref · 10.1002/jssc.200900337

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  • Dispersion in DLLME can be achieved by ultrasound or by repeatedly aspiring and injecting the sample with the disperser solvent.

    “In other cases, dispersion is by ultrasound [17] or repeatedly aspiring and injecting the sample with the disperser solvent [18,19].”
  • Pharmaceuticals are an important group of analytes that have been the objective of DLLME procedures, including antibiotics, tricyclic antidepressant drugs, clenbuterol, hypnotic drugs, psychotropic drugs, anti-inflammatory drugs, and cholesterol-lowering agents.

    “Another important group of analytes that have been the objective of DLLME procedures are pharmaceuticals (see Table 2) {e.g., antibiotics [58,68,71], tricyclic antidepressant drugs [69], clenbuterol [70], hypnotic drugs [72], psychotropic drugs [73], anti-inflammatory drugs [65] and cholesterol lowering agents [17]}.”
  • IL-DLLME has a drawback of a wide peak at the beginning of the chromatogram corresponding to the IL.

    “As can be seen, at the beginning of the chromatogram, there appeared a wide peak, corresponding to the IL - one of the main drawbacks of using IL-DLLME, as already reported [14-19,32,38,47,50,65-67] -although, in this case, it did not interfere at all in the separation.”
  • The use of IL in DLLME resulted in a wide peak at the beginning of the chromatogram, but it did not interfere with correct identification and quantification of the analytes.

    “The use of IL in DLLME resulted in the presence of a wide peak at the beginning of the chromatogram, as also happened on other occasions for different types of analytes. However, it did not interfere with correct identification and quantification of the analytes.”

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Authors
Mao, T., Hao, B., He, J., Li, W., Li, S., & Yu, Z.
Affiliations
Huazhong Agricultural University (CN)
Corresponding author
  • He, Jin
  • Yu, Ziniu
Venue
Journal of Separation Science
Publisher
Wiley
Published
2009-08-27
Volume
32
Issue
17
Pages
3029-3033
ISSN
  • 1615-9306 (ISSN-L)
  • 1615-9314
OpenAlex
W2110077286
Cited by
45
References
24
Citations by year
2020: 3 · 2018: 1 · 2016: 1 · 2015: 3 · 2014: 6 · 2013: 6 · 2012: 11
FWCI
8.02
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Separation Science (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Chemistry › Analytical Chemistry › Analytical chemistry methods development
  • Physical Sciences › Chemical Engineering › Catalysis › Ionic liquids properties and applications
  • Physical Sciences › Chemistry › Spectroscopy › Analytical Chemistry and Chromatography
Keywords
ultrasound-assisted extraction, ionic liquids, lovastatin, simvastatin, sample preparation, water analysis, environmental analysis, HPLC-UV
MeSH terms
Animals, Anticholesteremic Agents, Chromatography, High Pressure Liquid, Humans, Hydrogen-Ion Concentration, Lovastatin, Salts, Ultrasonics, Water, Simvastatin

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