Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:3550c
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 3550C
Character Range: 823227–824255

3550C
        Ultrasonic extraction* using:

        a. for low concentration (individual compounds <20 mg/kg):
        dichloromethane
        or
        dichloromethane/acetone (1:1)
        or
        hexane/acetone (1:1)
        or
        methyl tertiary-butyl ether
        or
        methyl tertiary-butyl ether/methanol (2:1)
        and
        exchange solvent (2-propanol).

        The solvent system chosen should be shown to give satisfactory, reproducible recovery of analytes spiked into the particular matrix (soil type) under test.

        Analysts should determine an appropriate concentration limit and ensure that quantitative results are based on sample concentrations that do not exceed the instrumental range.

        b. for high concentration (individual compounds >20 mg/kg):
        dichloromethane.

* Ensure samples do not overheat.

CRC CARE TPH TECHNICAL WORKING GROUP   End-over-end tumbling/shaking.

10.2.9.3     Extract clean-up
The tables below list the specified US EPA SW-846 methods.