Detection of PCBs in wood

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MATRIX: Wood, reduced to fine shavings or sawdust

ANALYTE: Polychlorinated biphenyls (PCB)

LIMIT OF DETECTION: 2 ppm as Aroclor 1260

MATERIALS:
PCB EnSys 12T Soil Test System, Equipment: Tools for reducing wood to fine particles (refer to sample treatment section
below).

SAMPLE TREATMENT:
If necessary, reduce wood poles, boards or lumber to fine chips, shavings or sawdust. Boring holes into the wood with a drill bit will generate shavings or chips that can be further reduced to fine particles using a coffee grinder or mill (e.g. Electric Seed & Coffee Mill, Model MC-170, Markson Science, Inc., Phoenix, AZ). Finer particulates will increase the PCB extraction efficiency of this procedure. Do not perform the extraction procedure on moist wood. Air dry moist samples by spreading chips, shavings or sawdust in a thin layer for up to 24 hours at room temperatures.

EXTRACTION PROCEDURE: Add 2.5 g of reduced wood sample to the Sample Extraction Jar containing methanol.

ANALYSIS: Follow the procedure as outlined in the PCB EnSys Soil Test System.

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