EPA Method 625

Summit Environmental Technologies prides itself in its expansive testing capabilities in a variety of different fields. To find out if Summit conducts this test, contact us at 330-253-8211 today.

PDF IconView Actual EPA Method 625 (PDF File)

EPA Method 625:
Semivolatile Organic Compounds by Isotope Dilution GC/MS

A 1 L aliquot of sample is adjusted to pH >11 and extracted in a separatory funnel with three 60 mL portions of methylene chloride or with 200-500 mL methylene chloride in a continuous extraction apparatus. The pH of the sample is then adjusted to

This method is applicable to the determination of extractable organics in municipal and industrial discharges.

EPA Method Guidance CD-ROM (includes MCAWW Methods, and most current EPA Methods)

(1) Contaminants from glassware.(2) Matrix interferences that are co-extracted with sample.(3) Base/Neutral extraction can result in loss of phenol, 2-methylphenol, and 2,4-dimethylphenol.(4) Resolution of the following compound pairs is not sufficient using the packed columns and conditions described in the method: (a) Anthracene and Phenanthrene (b) Chrysene and Benzo(a)anthracene (c) Benzo(b)fluoranthene and Benzo(k)fluoroanthene.

QC Requirements:
reagent blanks (RB), quality control samples (QCS), matrix spikes (MS)

Maximum Holding Time:
7 days (prior to extraction) 40 days (after extraction)



None given.

The precision and accuracy values were determined using regression equations derived from a 15 laboratory validation study. The study determined analytes using reagent water, drinking water, surface water, and industrial wastewaters with additions at six concentrations over the range 5 to 1300 ug/L. Single operator precision, overall precision, and accuracy were found to be directly related to the concentration of the parameter and essentially independent of the sample matrix.

MDLs determined per 40 CFR part 136, Appendix B.

Revision Number:
40 CFR Part 136, Appendix A (Current Edition)

Test Description:
Acids and Base/Neutr

Report Number:

Instrument used for this test: