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  • Rapid determination of nineteen chlorophenols in wood, paper, cardboard, fruits, and fruit juices by gas chromatography/mass spectrometry.

Rapid determination of nineteen chlorophenols in wood, paper, cardboard, fruits, and fruit juices by gas chromatography/mass spectrometry.

Journal of AOAC International (2001-06-22)
J M Diserens
ABSTRACT

Although the use of pentachlorophenol (PCP) is prohibited in most countries, it is still widely found in the wood of pallets, containers, crates and in cardboard, paper, etc. Such material may contain not only PCP but other chlorophenols as well. Wooden crates and cardboard boxes are often used to store and transport fresh fruits. Consequently, chlorophenols present in the wood may contaminate the stored fruits by migration. To ascertain that packaging, storage material, and fruit raw materials are free from chlorophenol residues, we developed a rapid and sensitive method for the detection of 19 chlorophenols by gas chromatography/mass spectrometry (GC/MS). The test portions are directly extracted and acetylated in a solution of sodium carbonate in the presence of acetic anhydride and hexane. The hexane layer is analyzed, without further purification, by GC/MS in the selective-ion monitoring mode. The method allows the analysis of >40 samples/day with detection limits of <20 microg/kg for chlorophenols in wood, cardboard, and paper, and <2 microg/kg for chlorophenols in fruits. Typical recoveries of all chlorophenols were 94% from paper, 115% from cardboard, 51% from wood (depending on the size of the chips or shavings), and 93% from fruit puree.

MATERIALS
Product Number
Brand
Product Description

Supelco
Merlin Microseal System (fits Agilent), 1 nut and 1 General Purpose (3-100 psi) septum
Supelco
Merlin Microseal System Replacement Septum, 1 SPME septum
Supelco
Merlin Microseal System Replacement Septum, 1 General Purpose (3-100 psi) septum
Supelco
Merlin Microseal System (fits Agilent), 1 nut and 2 General Purpose (3-100 psi) septa
Supelco
Merlin Microseal System Replacement Septum, 1 Low Pressure (1-45 psi) septum
Supelco
2,5-Dichlorophenol, PESTANAL®, analytical standard