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1 Scope and ApphcatlOn 2 3 4 5 6 1 4 Summary of Method 2 1 The sample IS aCIdIfied to a low pH ( < 2) and senally extracted wIth fluorocarbon-113 m 4 1 42 A representatIve sample of 1 hter volume should be collected m a glass bottle If analysIs IS to be delayed for more than a few hours, the sample IS preserved by the additlOn of 5 ml HCl (6 1) at the time ofcollectIon and refngelated at 4°C Because losses ofgrease WIll occur on samphng eqmpment, the collectlOn ofa composIte sample IS Impractical IndIVIdual portlOns collected at prescnbed time mtervals must be analyzed separately to obtam the average concentration over an extended penod OIL AND GREASE, TOTAL~ RECOVERABLE Method 413.1 (Gravimetric, Separatory Funnel Extraction) ThIS method mcludes the measurement of fluorocarbon-l13 extractable matter from surface and sahne waters, mdustnal and domestIc wastes It IS apphcable to the determmatlOn of relatIvely non-volatIle hydrocarbons, vegetable Oils, ammal fats, waxes, soaps, greases and related matter The method IS not apphcable to measurement of hght hydrocarbons that volatIhze at temperatures below 70°C Petroleum fuels from gasolme through #2 fuel Oils are completely or partIally lost m the solvent removal operatlOn Some crude oIls and heavy fuel Oils contam a sIgmficant percentage of resIdue-type matenals that are not soluble m fluorocarbon-l13 Accordmgly, recovenes of these matenals WIll be low aseparatoryfunnel ThesolventISevaporatedfromtheextractandtheresIdueweIghed DefimtlOns 3 1 The defimtlOn of 011 and grease IS based on the procedure used The nature of the 011 and/or grease, and the presence ofextractable non-Oily matter WIll mfluence the matenal measured and mterpretatlOn of results Samphng and Storage 1 1 1 2 1 3 The method covers the range from 5 to 1000 mg/1 ofextractable matenal Apparatus 51 Separatory funnel, 2000 ml, WIth Teflon stopcock 52 Vacuum pump, or other source ofvacuum 53 Flask, b01hng, 125 ml (Cormng No 4100 or equIvalent) 54 DistIlhng head, Cialsen or eqmvalent 55 FIlter paper, Whatman No 40, 11 cm Reagents 6 1 Hydrochlonc aCId, 1 1 MIX equal volumes ofconc HCl and dIstIlled water Approved for NPDES Issued 1974 Editonal reVISIon 1978 413 I-I STORET NO. 00556PDF Image | Methods for Chemical Analysis of Water and Wastes
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