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[Sample pretreatment for the measurement of phthalate esters in complex matrices]
Se Pu = Chinese Journal of Chromatography
|March 14, 2015
Summary
This study presents optimized sample pretreatment methods for measuring phthalate esters (PAEs) in diverse complex matrices using gas chromatography-mass spectrometry (GC-MS). The developed methods ensure reliable quantification of PAEs across various environmental and consumer product samples.
Area of Science:
- Environmental Chemistry
- Analytical Chemistry
- Trace Analysis
Background:
- Phthalate esters (PAEs) are widespread environmental contaminants.
- Accurate quantification of PAEs in complex matrices is challenging.
- Gas chromatography-mass spectrometry (GC-MS) is a key technique for PAE analysis.
Purpose of the Study:
- To propose and optimize sample pretreatment methods for PAE measurement.
- To adapt these methods for diverse complex matrices.
- To enhance the reliability and sensitivity of PAE analysis by GC-MS.
Main Methods:
- Investigated and optimized parameters for extraction and purification.
- Evaluated different extraction solvents (e.g., methylene chloride).
- Assessed solid-phase extraction (SPE) adsorbents (silica gel, C18) and eluents (n-hexane/ethyl acetate mixtures).
Main Results:
- Methylene chloride identified as the optimal ultrasonic extraction solvent.
- Silica gel proved effective and economical for SPE purification.
- C18 demonstrated high efficiency for PAE preconcentration in seawater.
- Optimized conditions yielded recoveries >58% and RSDs <10.5%.
Conclusions:
- Developed robust pretreatment protocols for PAE analysis in various matrices.
- Achieved low detection limits for PAEs in sediment and seawater.
- The proposed methods are suitable for the reliable GC-MS measurement of 16 PAEs.
