Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:3650b
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 3650B
Character Range: 824370–825534

3650B  Acid/base partition extraction (it is recommended that all extracts undergo this clean-up):
       pentafluorobenzyl bromide derivatisation (for GC/ECD
       analysis)
       phenols by GC/capillary column technique

Extract Analysis
      8041A   GC/FID
              GC/ECD (after derivatisation, if interferences prohibit proper analysis by GC/FID)
(P)   8270D   GC/MS

Note: GC analysis of some un-derived phenols is difficult (e.g. chlorinated and nitro compounds). The GC injector port should be clean and adequately silanised.

    10.2.10  Chlorinated herbicides

10.2.10.1 Scope and application
The method described below for chlorinated herbicides (by gas chromatography) is applicable but not limited to the determination of:
2,4-D               DCPA diacid                5-Hydroxydicamba
2,4-DB              Dalapon                    MCPA
2,4,5-T             Dicamba                    MCPP (mecoprop)
2,4,5-TP (Silvex)   3,5-Dichlorobenzoic acid   Pentachlorophenol
Acifluoren          Dichlorprop                Picloram
Chloramben          Dinoseb

10.2.10.2 Sample extraction
The tables below list the specified US EPA SW-846 methods.