Determination of Total Phthalates in Edible Oil by Phase Transfer Catalyst Assisted Hydrolysis and Supramolecular Solvent Extraction
10.11895/j.issn.0253-3820.150734
- VernacularTitle:相转移催化水解-超分子溶剂萃取法测定食用油中邻苯二甲酸酯总量
- Author:
Yangying HAN
;
Laping LIU
;
Jingru SUN
;
Jin WANG
;
Jing FENG
;
Shuhui LIU
- Publication Type:Journal Article
- Keywords:
Total phthalates;
Tetrabutylammonium chloride;
Supramolecular solvent extraction;
Edible oil
- From:
Chinese Journal of Analytical Chemistry
2016;44(6):901-907
- CountryChina
- Language:Chinese
-
Abstract:
A new method for the rapid determination of total phthalates (PAEs) in edible oils was developed. The PAEs in edible oils all were hydrolyzed to phthalic acid with tetrabutylammonium chloride (TBAC) as catalyst. Then phthalic acid was extracted by the supramolecular solvent ( SUPRAS) made up of octanol, tetrahydrofuran and aqueous solution, and detected by high performance liquid chromatography-tandem mass spectrometry (HPLC-MS / MS). As a result, hydrolysis time was 10 min. The linear range of phthalic acid was 0. 05- 2. 0 mg / L with a good correlation coefficients ( r > 0. 999). The limits of detection ( LOD) and quantification (LOQ) were 5. 41 and 18. 05 μg / kg, respectively. The recoveries of target analyte at three spiked levels were in the range of 84. 6% - 104. 5% . The repeatability, expressed as relative standard deviation (RSD), was 2. 6% for intra-day and 3. 7% for inter-day. The total PAEs content of 12 edible oils was found in the range of 0. 30-1. 09 mg / kg.
