A measured volume or weight of sample is extracted using the appropriate matrix specific
sample extraction technique.
Aqueous samples may be extracted at neutral pH with methylene chloride
using either Method 3510 (separatory funnel), Method 3520 (continuous liquid-liquid
extractor), Method 3535 (solid-phase extraction), or other appropriate technique or
Solid samples may be extracted with hexane-acetone (1:1) or methylene
chloride-acetone (1:1) using Method 3540 (Soxhlet), Method 3541 (automated Soxhlet),
Method 3545 (pressurized fluid extraction), Method 3546 (microwave extraction), Method
3550 (ultrasonic extraction), Method 3562 (supercritical fluid extraction), or other
appropriate technique or solvents.