Hydrocarbon "Fingerprinting" with Qualitative Narrative
Alpha refers to our most basic GC-FID hydrocarbon “fingerprinting” analysis as Petroleum Hydrocarbon Identification (PHI). This analysis is analogous to a “TPH fingerprint” analysis that a commercial environmental laboratory would provide, with some important differences. First, rather than the typical ~20 minute chromatographic run-time these other laboratories use, Alpha utilizes an 80 minute chromatographic run-time and the most appropriate sample extraction procedure depending on whether the sample is aqueous, soil, sediment, tissue or free product. There is a dramatic difference between this high resolution output and the typical “hump-a-gram” generated by a laboratory that does not specialize in hydrocarbon analysis.
Another major difference between what we provide for basic “fingerprinting” and other laboratories is the qualifications and experience of our staff. Alpha has a dedicated hydrocarbon analytical staff that performs all of our forensic hydrocarbon analyses. It is this same highly qualified staff that run our basic PHI analysis. A cursory qualitative narrative is included with this analysis and it outlines the hydrocarbon range the product elutes in as well as a discussion of what represents the best possible product identification. This tentative identification is based on an interpretation of the chromatographic data utilizing pattern recognition and boiling point ranges, and the best match between the sample unknown and our extensive product reference library. The relative elution range of the sample material based on a carbon number comparison is also provided along with chromatograms of the sample and the closest reference product from our library.
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