Food/Beverage Analysis for Melamine
 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
The LF-Series of NIR spectrometers provide affordable, accurate, and easy to use systems for melamine
screening in milk (liquid and powdered) yogurt, candy, coffee drinks, and more.
Melamine detection sprang into the forefront of U.S.
consciousness in 2007 and 2008 with the pet food and infant and
milk products to increase apparent protein content by increasing
the nitrogen content of the material. Incomplete cattle feed.
Kidney failure in pets from the formation of crystals due to
melamine was the cause of pet deaths. The infant formula and
powdered milk scares evolved from the use of milk-based of
renal complications in children in China, and the discovery of
milk-derived ingredients from Chinese sources in U.S. products
that included milk (liquid and powdered), yogurt, candy, coffee
drinks, and more. The FDA established a 2.5ppm acceptable level
for adult foods and a 1ppm level for infant formula.

As a result of these events, the government and food industries
considered analytical tools for detecting melamine, cyanuric
acid, melamine cyanurate, ammelide, and ammeline that would be
faster than the liquid chromatography methods that were in use.  
In addition to speed, other desirable analytical capabilities would
  • Sensitivity
  • Specificity
  • Fast detection
  • Low-cost
  • Minimal or zero sample preparation
  • Non-destructive analysis
  • Ability to measure melamine in a range of complex food
  • Portability for on-site/manufacturing plant analysis

LF-Series of NIR spectrometers are well-suited for melamine
screening across a range of materials, including liquids and
powdered dairy products. These NIR spectrometers use a stable
thermo-electrically cooled InGaAs array directly mated to a fiber
optic for maximum throughput. The TE-cooled multiplexed
InGaAs array includes all necessary order separating and/or long
pass filters. Gratings are optimized for the highest signal-to-
noise ratio across the full range. The spectrometers come with
an SMA-905 fiber optic input. Units can be customized with a
wide range of fiber optic accessories, including probes, lenses,
integrating spheres, and right angle diffuser. Customized input
formats are also available.

The LF-Series includes the following models and spectral ranges:
  • LF-2500: 1000-2500nm
  • LF-1250: 900-1700nm
  • LF-880: 650-1050nm

All SPECTRAL EVOLUTION spectrometers come with DARWin SP
Data Acquisition software. DARWin SP allows for rapid analysis
and easy set-up. Spectra are stored as ASCII for use with 3rd
party analysis software, including chemometrics. There’s no pre-
processing necessary before you use the spectra with an
analysis program.

An example configuration for detecting melamine included the
  • LF-2500 with a spectral range of 1000-2500nm
  • 20 Watt tungsten-halogen light source with user-adjustable
  • Li-ion rechargeable battery
  • Probe for reflectance with and SMA-905 fiber connection
  • Probe for transflectance with SMA-905 fiber
  • Probe for reflectance with an SMA-905
  • One meter fiberoptic
  • DARWin SP Data Acquisition software
  • One-touch autoexposure control
 First in Full Range PDA Spectrometer, Spectroradiometer and Spectrophotometer Systems
Accessories can include a contact probe with 5 watt
tungsten halogen illuminator and pistol grip, additional
fiber optic illumination modules, a cuvette and filter
holder, bifurcated dark field reflectance probe,
stainless steel irradiance probe, and a stainless steel
reflectance probe.
Affordable, compact, LF-Series spectrometers