Study on Determination of 21 Phthalate Acid Esters and Their Distributions in Different Types of Foods by Gas Chromatography-Mass Spectrometry
A sensitive method for the simultaneous determination of 21 phthalale acid esters( PARs) in foods by gas chromatography - mass Bpeclrome.-try{ GC - MS) was firstly proposed. Different separation and purification methods were selected according lo the types <A food, and the chromatographie conditions were optimized. Qualitative detection and confirmation were acquired by the extraction of characteristic ions, and the interferences due to the complex matrixes were effectively eliminated, thus avoiding the possibility of false positive results. The mass spectrometric fragmentation rule of PAEs was also discussed in detail. The. Calibration curves of 21 compounds were linear in the range of 0.1 -100 mg/L with correlation coefficients not less than 0.999 2. The quantitative limits (LOQs, S/N = 10) ranged torn 0. 05 mg/kg to 0. 5 mg/kg. The average spiked recoveries were in the range of 83% -106% at spiked levels of 0. 10 -10 mg/kg with relative standard deviations (RS-Ds, n =6)of 2.9% -5. 5% . The method was successfully applied in the investigation of the PAEs distribution in foods and food packaging material of South China area, and the source of PAEs was also discussed in detail.
phthalate acid estersplasticizergas chromatographymass spectrometryfoodsfood packaging material
国家科技期刊平台
NSTL
万方数据
维普
