Development of magnetic micro-solid phase extraction for analysis of phthalate esters in packaged food. (1st January 2015)

• Record Type: Journal Article
• Authors: Makkliang, Fonthip; Kanatharana, Proespichaya; Thavarungkul, Panote; Thammakhet, Chongdee
• Is Part Of: Food chemistry. Volume 166(2015)
• Page Start: 275
• Page End: 282
• Publication Date: 2015-01-01
• Subjects: Trace analysis -- Phthalate esters -- Magnetic-micro-solid phase extraction -- Cryogel -- Multi-walled carbon nanotubes; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2014.06.036
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: A novel and low cost magnetic-MWCNTs-PVA cryogel-μ-SPE sorbent was developed. Large surface with high extraction efficiency μ-SPE sorbent was obtained. It was successfully used for the extraction of DBP and DEHP in packaged food. The material cost was only $US 0.04 and one sorbent can be reused up to 30 times. Abstract: A novel, simple and low cost magnetic multi-walled carbon nanotubes-poly (vinyl alcohol) cryogel-micro-solid phase extraction (magnetic-MWCNTs-PVA cryogel-μ-SPE) sorbent was synthesized by incorporating magnetic particles and MWCNTs into a PVA cryogel. The magnetic-MWCNTs-PVA cryogel-μ-SPE sorbent developed, with a large surface area and macro-porous structure, provided good sorbent-to-sorbent reproducibility (%RSD < 8) and each sorbent could be used up to 30 times (%RSD < 6). This sorbent was applied for the extraction of dibutyl phthalate (DBP) and di-2-(ethylhexyl) phthalate (DEHP) in packaged food prior to analysis by gas chromatograph coupled with flame ionisation detector (GC-FID). The concentration of DBP and DEHP in hot-water samples from plastic bags were found in the range 0.04–0.15 μg mL −1 and 0.03–0.20 μg mL −1, respectively, but only DEHP was found in clear chicken soup samples in the range 0.02–0.07 μg mL −1 .