First in Full Range PDA Spectrometer, Spectroradiometer and Spectrophotometer Systems
Soil scans can provide critical
information on TPH content
associated with potential leaks and
Pinpoint Leaks and Spills with NIR
 First in Full Range PDA Spectrometer, Spectroradiometer and Spectrophotometer Systems
1 Canal Street  ◊  Unit B1
Lawrence, MA 01840  USA
Tel: 978 687-1833  ◊  Fax: 978 945-0372

Copyright © 2012 Spectral Evolution, Inc
Underground pipelines, refineries, storage tanks - all are potential sites for leaks, spills and seepage. The
PSR+ 3500 can help researchers bring the power and non-destructive measurement capabilities of
spectroscopy to bear on the search for contamination with fast and accurate measurement of TPH
Contamination of soil due to leaks, spills, and seepage is a worldwide
by costly and time-consuming methods that primarily use wet
Typically, Total Petroleum Hydrocarbon (TPH) measurements are
used. Using a field portable spectrometer or spectroradiometer to
measure TPH in soil is fast and non-destructive. The scan can be
made in the field covering a full 350-2500nm spectrum and the
results displayed on a handheld microcomputer, tablet, or laptop,
Hydrocarbon spectra are usually characterized by four main
absorption features at 1180 and 1380nm and 1730 and 2310nm. By
looking at these bands, other compounds can be eliminated and the
presence of hydrocarbons verified. In addition, by building a model
based on known TPH samples from chemical analyses, spectroscopy
can be combined with regression analysis to measure and identify
different species of hydrocarbons in different soil components.

Scanning and analyzing vegetation chlorophyll can also be used to
identify when vegetation shifts toward the "red edge" at 700nm and
chlorophyll is lost. This is another indicator of potential oil and gas

SPECTRAL EVOLUTION'S full range, field portable spectrometers and
spectroradiometers deliver fast, accurate, and flexible ways to
measure both hydrocarbons in soil and changes in vegetation with:
  • Fast collection of data in seconds with no sample prep or
    sample destruction
  • Precision, accuracy, and a wealth of information, especially if
    the spectra are combined with chemometrics analysis
  • Affordable measurement technology
  • In situ measurement with portable, field-tested
    spectroradiometers and

A full range spectroradiometer such as the
PSR+ 3500 provides:
  • Spectral range 350-2500nm
  • Reliable one-touch operation with autoshutter, autoexposure
    and auto-dark correction before each new scan - no
    optimization step required
  • Small and lightweight with rechargeable lithium-ion batteries
  • Superior signal-to-noise ratio: faster scan times and better
    reflectance measurement
  • Single user operation with optional rugged PDA that provides a
    sunlight readable display plus the ability to tag spectra with
    GPS, digital images, and audio notes
  • DARWin SP Data Acquisition software for ease-of-use - saves
    files in ASCII format for use with 3rd party software - no pre-
    processing necessary
  • Optional EZ-ID mineral identification software with Custom
    Library Builder module to build your own library for regression
The PSR-Series
Soil samples were scanned using a
PSR+ spectroradiometer with
mineral identification software and the
SpecMIN mineral spectra library. Clay
mineral alteration of smectite to
kaolinite can be an indicator of
hydrocarbon presence in soil.
Clay mineral identification with EZ-ID software
PSR+ spectroradiometer and PSM-3500 spectrometer for TPH in soil