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.
|Published (Last):||9 April 2008|
|PDF File Size:||19.75 Mb|
|ePub File Size:||9.24 Mb|
|Price:||Free* [*Free Regsitration Required]|
Save the bottle for further use. Therefore, the performance of the method after such modifications must be verified by the procedure in Section 9. Exposure to these compounds should be reduced to the lowest possible level.
For example, a reference sample of human adipose tissue containing pentachloronaphthalene can be used to exercise the cleanup systems when samples containing pentachloronaphthalene are expected. The basic silica gel Section 7.
After the aliquots are dry or if the sample cannot be dried, reduce the particle size using the procedures metho Section Because the instrument is operated in the high-resolution mode, mass drifts of a few ppm e. Use within five days of baking. Complete the quantitative transfer with several hexane rinses. Apply vacuum to the flask, and pour the entire contents of the sample bottle through a glass-fiber filter Section 6. Determine the weight of the sample by difference.
If the sampler uses a peristaltic pump, a minimum length of compressible silicone rubber tubing may be used in the pump only. Cover the beakers with aluminum foil and allow to equilibrate for hours.
Once the appropriate tissue has been determined, the sample must be homogenized. If more than mg of material remains, repeat the cleanup using a fresh anthropogenic isolation column.
Corrective actions must be implemented whenever the resolving power does not meet the requirement. At the proper rate of concentration, the flow of solvent into the receiving flask will be steady, but no bumping or visible boiling of the extract will occur. An integrating flow meter is used to collect proportional composite samples.
Shake for 2 minutes with periodic venting into a hood. At the proper rate of distillation, the balls of the column will actively chatter but the chambers will not flood.
The analyst is permitted to modify the method to overcome interferences or lower the cost of measurements, provided that all performance criteria in this method are met.
Weigh the receiver and boiling chips. Report i the percent solids so that the result may be corrected. Report results below the minimum level as not detected or as required by the regulatory authority. Add 10 uL of nonane to the vial, and evaporate the solvent to methood level of the nonane. Cap the bottle and mix the sample by careful shaking. Grind the sample aliquots from Sections The most frequently encountered interferences are chlorinated biphenyls, methoxy biphenyls, hydroxydiphenyl ethers benzylphenyl ethers, polynuclear aromatics, and pesticides.
Isomer-Specific Separation of 2,3,7,8? The extract is concentrated for cleanup. Increasing the strengths of the acid and basic silica gel may also require different volumes of hexane than those specified above to elute meyhod analytes off the column. Equivalent performance may be achieved using apparatus and materials other than those specified here.
All materials used in the analysis shall be demonstrated to be free from interferences by running reference matrix method blanks initially and with each sample merhod samples 163b through the extraction process on a given hour shift, to a maximum of 20 samples. Samples containing multiple phases are pressure filtered and any aqueous liquid is discarded.
For samples containing a high concentration of particles suspended solidsfiltration times may be 8 hours or longer. Va – The extract volume in mL. The analytes are listed in Table 1.
Summit Environmental Testing | EPA METHOD B
Concentrate the eluate per Sections The practices in References 2 and 14 are highly recommended. To assure homogeneity, grind three times.
The solvent evaporation techniques used in this mthod are amenable to solvent recovery, and it is recommended that the laboratory recover solvents wherever feasible. Chlorothene, then washing with any detergent and water.
Each laboratory that uses this method must demonstrate the ability to generate acceptable results using the procedure in Section 9. It is suggested that the QC Check Sample be analyzed at least quarterly. Ongoing precision and recovery.
EPA Method 1613B
Any alternative technique acceptable so long as the requirements in Section 9 are met. If methos adjustment alters the resolution of the mass spectrometer, resolution shall be verified Section Development of accuracy statements is described in Section 9. Close the stopcock when the hexane is w,thm 1 mm of the sodium sulfate. Pre-elute the column with 50 mefhod mL of hexane. For aqueous samples containing greater than one percent! Collect the eluant for reuse. Frequently check the apparatus for foaming during the first 2 hours of extraction.
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. Loosen cap in a hood to vent excess pressure. If an emulsion forms, the analyst must employ mechanical techniques to complete the phase separation.
Only glass or fluoropolymer tub- ing shall be used.