Figure F53. Total ion chromatograms for sequential extraction of cuttings (Sample 337-C0020A-25-SMW). The extract from the exterior is dominated by drilling mud components (marked by *). After cleaning by sonication in solvent, a repeat (second) sonication results in strongly reduced detection of GC-amenable compounds; however, drilling mud components no longer dominate, suggesting that the surface has been cleaned. The subsequent solvent extract obtained from the crushed sample contains far less drilling contaminants. is = standard. ASE = extract obtained from Accelerated Solvent Extractor.
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