期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 63, 期 42, 页码 9372-9378出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.5b03922
关键词
fluorescence immunoassay; phthalate esters; diisobutyl phthalate; edible oil
资金
- National Natural Science Foundation of China [41271340]
- Guangdong Natural Science Foundation [S2013030013338, S2013040013021]
The diisobutyl phthalate (DiBP) hapten containing an amino group was synthesized successfully, and the polydonal antibody against 4-amino phthalate-bovine serum albumin (BSA) was developed. On the basis of the polydonal antibody, a rapid and sensitive indirect competitive fluorescence immunoassay (icFIA) has been established to detect DiBP in edible oil samples for the first time. Under the optimized conditions, the quantitative working range of the icFIA was from 10.47 to 357.06 ng/mL (R-2 = 0.991), exhibiting a detection limit of 5.82 ng/mL. In this assay, the specific results showed that other similar phthalates did not significantly interfere with the analysis, with the cross-reactivity less than 1.5%, except for that of DiBAP. Thereafter, DiBP contamination in edible oil samples was detected by icFIA, with the recovery being from 79 to 103%. Furthermore, the reliability of icFIA was validated by gas chromatography mass spectrometry (GC-MS). Therefore, the developed icFIA is suitable for monitoring DiBP in some edible oil samples.
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