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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Rinse the receiver twice with 1-mL portions of hexane, and apply separately to the column. All portions of the column that connect the GC to the ion source shall remain at or above the interface temperature metgod above during analysis to preclude condensation of less volatile compounds. The lipid contents of different species and portions of tissue can vary widely. Remove any non-aqueous liquid present and reserve the maximum amount filtered from the sample Section Immediately cap and shake 1 rpa 3 times.

Allow the sample to equilibrate for 1 to 2 hours, with occasional shaking. Sonication of glassware containing a detergent solution for approximately 30 seconds may aid in cleaning. The method blank is used to determine if analytes or interferences are present in the laboratory environment, the reagents, or the apparatus.

Metuod the weight to the nearest 10 mg. The sample is mixed with sodium sulfate, allowed to dry for 12 – 24 hours, and extracted for hours using methylene chloride: If sample pH is greater than 9, adjust to pH with sulfuric acid.

This test is described in Section 9. If SPE is not to be used and the sample contains visible particles, proceed to the following section for filtration of particles. The volume injected must be identical to the volume used for calibration Section 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 Rinse the sample container twice with 1-mL portions of hexane and apply to the column.


Discard the aqueous layer. Cover the beakers with aluminum foil and allow to equilibrate for hours. Collect the fraction s in a clean mL concentrator tube containing 5 mL of hexane: R,nse the sample container twice with 1-mL portions of hexane and apply separately to the column.

This will assist the laboratory in tracking possible sources of contamination for individual samples, identifying glassware associated with highly contaminated samples that may require extra cleaning, and determining when glassware should pea discarded. One liter of aqueous samples i containing one percent solids will mehod 10 grams of solids. Connect the column to the detector Section 6. For aqueous samples containing greater than one percent!

The solvent evaporation techniques used in this method are amenable to solvent recovery, and it is recommended that the laboratory recover solvents wherever feasible. Tap the column to settle the adsorbents. The optimum technique depends upon the sample, but may include stirring, filtration through jethod wool, use of phase separation paper, centrifugation, use of an ultrasonic bath with ice, addition ofNaCl, or other physical methods.

If residual chlorine is present in aqueous samples, add 80 mg sodium thiosulfate per i liter of water. The extract is e;a to dryness, and the lipid content is determined.

Summit Environmental Testing | EPA METHOD B

CS, January 15, A large vortex in the solvent may cause analyte loss. The residue content of the extract may be obtained gravimetrical’y by evaporating the solvent from a uL aliquot.


Proceed with micro-concentration and solvent exchange Section The procedures and criteria for analysis of a method blank are described in Sections 9. Correct the problem and repeat 1613 test Section 9.

Soe 10 3. Corrective actions must be implemented whenever the resolving power does not meet the requirement. Close the stopcock when the hexane is within 1 mm of the alumina. Excessive PFK or any other reference substance may cause noise problems and contamination of the ion source necessitating increased frequency of source cleaning. It is equivalent to the concentration of the lowest calibration standard, assuming that all method-specified sample weights, volumes, and cleanup procedures have been employed.

Set aside the concentration apparatus for re-use. Proceed with column cleanups Sections If s and X for all compounds meet the acceptance criteria, system performance is acceptable and analysis of blanks and samples may begin.

Specific selection of reagents and purification of solvents by distillation in all-glass systems may be required. Maintain a head pressure of 7 to 10 psig.

One aliquot will serve as the method blank.

EPA Method 1613B

It is also suggested that the laboratory perform personal hygiene monitoring of each analyst who uses this method and that the results of this monitoring be made 1613n to the analyst. Under those conditions, sensitivity changes that might occur during the analysis can be more effectively monitored.

Stir for 2 to 3 hours. Rather, bring the extract back to its previous volume e.