EPA Method B in the EPA methods list database. View all EPA methods. This article compares results from samples prepared and analyzed according to EPA Method B on a sector instrument with those from a. EPA Method B. Summit Environmental Technologies prides itself in its expansive testing capabilities in a variety of different fields. To find out if Summit.
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Repeat the addition of solvent and concentrate once more. Determine the weight of the sample by difference. Where possible, reagents are cleaned by extraction or solvent rinse.
Gross losses to the laboratory ventilation system must not be allowed. The speed and intensity of shaking action should also be adjusted to minimize the possibility 1613bb breakage.
Cut paper to simulate the surface area of the paper sample being tested.
Summit Environmental Testing | EPA METHOD B
If calibration ,s not verified, the system shall be recalibrated using the calibration solution, and the previous 20 samples shall be re-extracted and cleaned up using the calibrated GPC system. Procedures for dilution are given in Section After the aliquots are dry or if the sample cannot be dried, reduce the particle size using the procedures in Section Remix prior to extraction to prevent clumping.
Store in a bottle with a fluoropolymer-lined screw-cap. Clamp the filter and SPE disk between the 1-L glass reservoir and the vacuum filtration flask. Record the total volume of water collected. Repeat the base washing until no color is visible in the aqueous layer, to a maximum of four washings. Shake for 12 to 24 hours. If particular circumstances require the use of a cleanup procedure, the analyst may use any or all of the procedures below or any other appropriate procedure.
In this event, adjust the GC and repeat the verification test Section Softer particles can be reduced by grinding in a Wiley mill or meat grinder, by homogenization, or in a blender. If the size of the largest particles is i greater than 1 mm, the particle size must be reduced to 1 mm or less prior to extraction i using the procedures in Section Paper industry methods suggest that the addition of up to mL of ethanol to a 1-L effluent sample may also reduce emulsion formation.
EPA Method 1613B
During analytical operations that may give rise to aerosols or dusts, personnel should wear respirators equipped with activated carbon filters. Start the GC column initial isothermal hold upon injection. If calibration is not verified, the system shall be recalibrated using the calibration solution, and the previous 20 samples shall be re-extracted and cleaned up using the calibrated system.
Check the column 6113b channeling.
The optimum technique depends upon the sample, but may include stirring, filtration through glass wool, use of phase separation paper, centrifugation, use of an ultrasonic bath with ice, addition ofNaCl, or other physical methods. If necessary to remove water, filter the sample through a glass-fiber filter and discard the aqueous liquid. Isomer-Specific Separation of 2,3,7,8? One of these aliquots will serve as the method blank.
Frequently check the apparatus for foaming during the first 2 hours of extraction.
One aliquot will serve as the method blank. For samples containing a high concentration of particles suspended solidsfiltration times may be 8 hours or longer. Ca – Meethod concentration of the compound in the extract.
Rinse the concentration vessel with small portions of hexane, adjust the hexane volume in the separatory funnel to 10 to 20 mL, and proceed to back- extraction Section If the sampler uses a peristaltic pump, a minimum length of compressible silicone rubber tubing may be used in the pump only.
Extraction and analysis by GC with an electron capture detector BCD can achieve a limit of detection of 0. The isomers and congeners of tetra- through octa- chlorodibenzofuran.
Rinse the bottle and sodium sulfate with hexane to complete the transfer. Close fpa stopcock when the hexane is w,thm 1 mm of the sodium sulfate.
Ongoing precision and recovery. An IPR is performed prior to the first time this method is used and any time the method or instrumentation is modified. Additional information on laboratory safety can be found in References Plastic bag liners should be used in waste cans.
In this case, alternate extraction and cleanup procedures in this method must be employed to resolve the interference. Repeat the acid washing until no color is visible in the aqueous layer, to a maximum of four washings.