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Updated: Jul 16, 2025
Extraction of Organochlorine Pesticides from Plastic Pellets and Plastic Type Analysis
Published on: July 1, 2017
A poly(o-phenylenediamine) coated aluminum garter spring micro-solid phase extractor for pyrethroids in chili
Kednipa Lumlong1, Charinrat Siritham2, Wing Cheung Mak3
1Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand; Center of Excellence for Trace Analysis and Biosensor, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
A novel poly(o-phenylenediamine) (PoPD)-coated aluminum garter spring sorbent effectively extracts seven pyrethroids from chili products. This method offers a simple, reusable approach for trace analysis of these pesticides.
Area of Science:
- Analytical Chemistry
- Materials Science
Background:
- Pesticide residue analysis in food products is crucial for consumer safety.
- Micro-solid phase extraction (µ-SPE) offers a sensitive and efficient sample preparation technique.
- Development of novel sorbent materials is key to improving extraction efficiency and selectivity.
Purpose of the Study:
- To develop and validate a new sorbent material for the extraction of seven pyrethroids.
- To apply the developed method for the determination of pyrethroids in chili-based food matrices.
- To evaluate the performance characteristics of the proposed extraction method.
Main Methods:
- Fabrication of an aluminum garter spring coated with poly(o-phenylenediamine) (PoPD) as a µ-SPE sorbent.
- Extraction of seven pyrethroids (bifenthrin, fenpropathrin, lambda-cyhalothrin, cyfluthrin, permethrin, cypermethrin, deltamethrin) from fresh chili, chili flakes, and curry pastes.
- Quantification using gas chromatography coupled with an electron capture detector (GC-ECD).
Main Results:
- The method demonstrated good linearity in the concentration range of 10-3000 µg kg⁻¹.
- Limits of detection (LOD) and quantitation (LOQ) ranged from 9.3 to 34.2 µg kg⁻¹ and 11.8 to 48.6 µg kg⁻¹, respectively.
- The sorbent exhibited excellent reproducibility and reusability, with detected pyrethroid levels up to 30.3 ± 1.2 µg kg⁻¹ in chili samples.
Conclusions:
- The PoPD-coated aluminum garter spring is a promising and reusable sorbent for µ-SPE of pyrethroids.
- The developed method is simple, sensitive, and suitable for the trace analysis of pyrethroids in complex food matrices.
- This approach has potential for the analysis of other trace compounds in various samples.
