Total Petroleum Hydrocarbons (TPH), WP

One liter whole-volume bottle is ready to analyze for TPH. Use with EPA Methods 1664, 5520, or other applicable method. For CRMs, #600 contains no interfering fatty acids and #601 contains interfering fatty acids. #642 (PT) and #602QR may or may not contain interfering fatty acids. Identifying the presence or absence of fatty acids is part of the proficiency test.