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Topic: “Measurement of
Melamine Content" EASUREMENT OF MELAMINE(三聚氢胺)
CONTENT
Speaker: Rick Cash, Global Product Manager,
Thermo Fisher Scientific
Abstract
In the production of wheat gluten, milk
powder, or other protein containing powders,
measurement of melamine contamination is an
important safety consideration. Determination of
melamine content independent from protein
content is the critical step. Melamine and
protein molecules each contain considerable
amounts of nitrogen. This similarity makes it
difficult to measure melamine. The ability to
measure melamine concentration without detecting
change in protein content is the focus of this
application report.
Melamine can be continuously
measured online in real-time using the
Spectra-Quad Online Constituent Analyzer from
Thermo Fisher Scientific. The Spectra-Quad uses
a measurement technique based on Near Infrared (NIR)
light absorption. It is a non-contact,
non-destructive and non-hazardous method. The
sensor illuminates the sample with NIR light at
a wavelength that the constituent of interest,
such as melamine, absorbs. The light is very low
intensity and does not heat or damage the
sample. The sensor measures reflected light. The
more melamine present, the less light is
reflected. The reflected light is inversely
proportional to the amount of the constituent
(melamine).
The Spectra-Quad sensor can
be located over any existing conveyor. The
SpectraQuad can also measure melamine in
pneumatically conveyed product through the use
of a powder sampler. The data can be outputted
to a process control system or PC based
controller. Melamine contamination detection is
a continuous measurement. Product can be
guaranteed safe from melamine contamination.
Biography
Rick Cash currently is Marketing Technology
Manager for Thermo Fisher Scientific’s Process
Instrument Division. Rick has 20 years of
experience in design and development of
technically advanced instrumentation and
measurement products at Thermo Fisher
Scientific, CyberOptics, and Honeywell, Inc. He
holds a BSEE from the University of Michigan and
a MSEE from the University of Minnesota.<back>
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