Request for Information on EPH Results

by: The LSPA Technical Practices Committee

The LSPA Technical Practices Committee is looking for information from members on situations where non-petroleum related compounds could possibly have impacted EPH hydrocarbon ranges.  This is an outgrowth of the study described in the article, "Potential False Positives in the Volatile Petroleum Hydrocarbon (VPH) Analytical Method:  The Effect of Non-Target Compounds on MCP Decisionmaking" by Richard J. Rago and Jane Parkin Kullmann, Haley & Aldrich, Inc. and James F. Occhialini, Alpha Analytical Labs. That article appears in the LSPA's online journal here.  

The researchers of that study, which investigated whether the presence of non-petroleum related compounds could cause the over-estimation of VPH hydrocarbon ranges, are seeking information to determine whether an analogous situation could affect EPH hydrocarbon ranges in the same way. 

Specifically, they are interested in your responses to these questions:  

  1. What have you found as non-petroleum based peaks via EPH?   Examples might include phthalates, pesticides, phenols, PCBs (at high concentrations), and others.
  2. Have you had problems with 'unknown' peaks showing up in your EPH results?
  3. How are you evaluating your lab reports?  Do you look at your EPH chromatograms?

If you have information to share, please contact Rich Rago, Lead Scientist, Haley & Aldrich at rrago@haleyaldrich.com or Jim Occhialini, VP of Technical Sales, Alpha Analyticalat jocchialini@alphalab.com.