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Significance and Use
4.1 Chlorinated compounds can lead to corrosion of equipment and poisoning of the catalyst. Chlorinated compounds also present a health hazard when incompletely combusted. Chlorine content of petroleum products is determined prior to their being recycled.
Note 1: Federal Regulations mandate that often the chlorine content of used oil must be determined before recycling. EPA regulation 40 CFR 261 bars the sale of used oil for fuel if it is contaminated with halogens measured as chlorine at levels exceeding 1000 mg/kg. Such oil is considered to be a hazardous waste unless it can be proven that the chlorine content is inorganic or that the halogenated organics are not hazardous constituents. The cost of disposing of a hazardous waste is many times higher than the cost of used oil disposal. Therefore it is critical for users, generators, haulers, reprocessors, and collectors to test the material they handle in order to comply with regulations, maintain safe operations, and avoid high disposal costs.
4.2 These test methods can be used to determine when a used petroleum product meets or exceeds requirements for total halogens measured as chloride. It is specifically designed for used oils, permitting on-site testing at remote locations by nontechnical personnel to avoid the delays of laboratory testing.
1.1 These test methods cover the determination of chlorine in used oils, fuels, and related materials, including: crankcase, hydraulic, diesel, lubricating and fuel oils, and kerosene, all containing <25 % (mass/mass) water.
1.1.1 If the sample contains greater than 25 % water, the sodium metal reacts preferentially with the water rather than with the halogenated organics in the oil.
1.1.2 Bromide and iodide are also titrated and reported on a molar basis as chlorine. The method does not detect fluorine because AgF remains in the solution during the titration, while AgI, AgBr, and AgCl precipitate out and can therefore be detected.
1.1.3 Some of the chlorinated organic compounds that have been shown to be detectable by this method include trichloroethane, dichloroethane, trichlorobenzene, monochlorobenzene, chlorooctadecane, methylene chloride, perchloroethylene, Freon, and polychlorinated biphenyls. These nine compounds represent the major classes of chlorinated compounds that are found in used oils.
1.2 The entire analytical sequence, including sampling, sample pretreatment, chemical reactions, extraction, and quantification, is available in kit form using predispensed and encapsulated reagents. The overall objective is to provide a simple, easy to use procedure, permitting nontechnical personnel to perform a test in or outside of the laboratory environment in under 10 min. The test method also gives information to run the test without a kit.
1.2.1 Test Method A is preset to provide a greater than or less than result at 1000 mg/kg (ppm) total chlorine to meet regulatory requirements for used oils.
1.2.2 Test Method B provides results over a range from 200 to 4000 mg/kg total chlorine.
1.3 For both test methods, positive bias will result from samples that contain greater than 3 % (mass/mass) total sulfur. While a false negative result will not occur, other analytical methods should be used on high sulfur oils.
1.4 Test Method B, Lower Limit of Quantitation—In the round-robin study to develop statistics for this test method, participants were asked to report results to the nearest 100 mg/kg. The lower limit of quantification could therefore only be determined to be in the range from 870 mg/kg5 to 1180 mg/kg5.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific safety statements are given in Sections , , and .
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
ICS Number Code 75.080 (Petroleum products in general)
UNSPSC Code 15101500(Petroleum and distillates)