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Trace phthalate and adipate esters contaminated in packaged food.

Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes (2007-06-15)
Pamornrat Kueseng, Panote Thavarungkul, Proespichaya Kanatharana
ABSTRACT

A method for trace analysis of two plasticizers, di-2-ethylhexyl phthalate (DEHP) and di-2-ethylhexyl adipate (DEHA), contaminated in packaged curry paste were investigated by gas chromatography with flame ionization detector (GC-FID). Curry paste samples were extracted by ultrasonic and solid phase extraction using Florisil(R) cartridge. Analysis by the GC-FID system provided limits of detection for DEHA and DEHP at 12 and 25 microg L(- 1) and a linear dynamic range between 25 microg L(- 1) to 60 mg L(- 1) with a coefficient of determination (R(2)) greater than 0.99. High recoveries were obtained, ranged from 91 to 99% and 88 to 98% for DEHP and DEHA with RSD lower than 7 and 10% respectively. The method detection limit and limits of quantitation were ranged from 27 to 30 and 90 to 100 microg L(- 1). The analysis of curry paste samples showed concentrations of DEHP and DEHA in the range of 4.0 ng g(- 1) to 0.61 microg g(- 1).

MATERIALS
Product Number
Brand
Product Description

Supelco
Bis(2-ethylhexyl) adipate, 99%
Sigma-Aldrich
Bis(2-ethylhexyl) adipate, ≥99%
Supelco
Bis(2-ethylhexyl) adipate, Selectophore, ≥99.0%
Supelco
Di(2-ethylhexyl)adipate solution, certified reference material, 2000 μg/mL in methanol
Sigma-Aldrich
Bis(2-ethylhexyl) adipate, ≥97.0% (GC)