Our unique leaf clip has a built-in white reference and keeps the light source - the
ILM-105 - away from the sample so it remains completely unaffected by the
Estimating plant lignin content
 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
Using a field spectroradiometer such as the Spectral Evolution PSR+,
a researcher can get an estimate of lignin content in the field or in a
lab. Lignin is a polymer of phenylpropanoid and accounts for 10 to
35% of dry weight of plants and acts as a barrier to decomposition of
cellulose and hemicellulose. NIR spectroscopy provides a useful tool
for lignin measurement with key absorption features at 1120, 1143,
1200, 1420, 1450, 1680, 1930, 2050-2140, 2270, 2330, 2380 and 2500nm.
All spectra taken by the PSR+ are stored as ASCII files for use with
other third party software that includes R, ENVI, and various
chemometrics software programs.

The PSR+ is a full range, UV-VIS-NIR instruments with high resolution
and low noise. DARWin SP Data Acquisition software is included with
every instrument. The PSR+ provides the field researcher with the
option of using direct attach lenses for standoff measurements or a
fiberoptic cable with FOV lenses, a contact probe, sphere, pistol
grip, our unique leaf clip and other accessories. The PSR+ offers
auto-exposure, auto-dark correction, and auto-shutter for one touch

By measuring lignin, process decisions can be made before pulping,
biomass can be characterized for use as fuel, and different species
with lower lignin content can be planted for forage.

The PSR+ is lightweight and rugged—built with photodiode arrays
and no moving parts for consistent reliable operation in field
conditions. Additional vegetation remote sensing applications
  • Species identification
  • Assessment of phosphorous and potassium nutrients in plants
  • Measurement of moisture and water content
  • Soil characterization and analysis
  • Ground truthing satellite imagery and measurements
  • Total organic carbon (TOC) in soil
  • Biomass research
 First in Full Range PDA Spectrometer, Spectroradiometer and Spectrophotometer Systems
The PSR+ 3500  is a field portable spectroradiometer for
remote sensing applications including lignin estimation.
PSR+ field spectroradiometer for vegetation studies