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Determination of Alkylphenolic Residues in Fresh Fruits and Vegetables by Extractive Steam Distillation and Gas Chromatography-Mass Spectrometry

Deng-Kai Yang, Wang-Hsien Ding

J Chromatogr A. 2005 Sep 23;1088(1-2):200-4.

PMID: 16130752

Abstract:

This study describes a simple and sensitive method for determining the alkylphenolic compounds, 4-tert-octylphenol (4-t-OP), 4-nonylphenol isomers (4-NPs), and their monoethoxylates (4-t-OP1EO and 4-NP1EOs), in fresh fruits and vegetables. The method involves extracting a sample by a modified Nielson-Kryger steam distillation extraction using n-hexane for 1 h. The alkylphenolic compounds were identified and quantitated by gas chromatography-mass spectrometry (GC-MS) in selected ion monitoring (SIM) mode. Various pH values and amounts of NaCl added to the sample solution were evaluated as extraction conditions. The quantitation limit of this method was less than 0.2 ng/g in 10 g (fresh weight) of sample. Recovery of alkylphenolic compounds in spiked samples exceeded 64% while R.S.D. ranged from 1.0 to 9.8%. Alkylphenolic residues were detected in fresh fruits and vegetables at concentrations of 4-NPs and 4-t-OP from n.d. to 16 ng/g and from n.d. to 4.8 ng/g (fresh weight), respectively. NP1EO and OP1EO were always below the quantitation limit.

Chemicals Related in the Paper:

Catalog Number Product Name Structure CAS Number Price
AP2315675-A 4-tert-Octylphenol monoethoxylate solution, 1 μg/mL in acetone 4-tert-Octylphenol monoethoxylate solution, 1 μg/mL in acetone 2315-67-5 Price
AS213295 Nonylphenol monoethoxylate solution Nonylphenol monoethoxylate solution Price
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