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Table 1 Grouping of sample preparation methods for analysis of PAH and PCB according to extraction method and polarity of solvent

From: Validation of European horizontal methods for the analysis of PAH, PCB and dioxins in sludge, treated biowaste and soil

Code

Extraction

Solvent

1

Agitation

Mixture polar/non-polar

2

Agitation

Non-polar

3

Pressurised liquid extraction

Non-polar

4

Pressurised liquid extraction

Mixture polar/non-polar

5

Soxhlet

Non-polar

6

Soxhlet

Mixture polar/non-polar

7

Ultrasonic bath

Polar

8

Agitation and ultrasonic bath

Non-polar

9

Ultrasonic bath

Mixture polar/non-polar