Since the BSE crisis, researches concern mainly the detection, identification, and quantification of meat and bone meal
with an important focus on the development of new analytical methods. Microscopic based spectroscopy methods (NIR
microscopy - NIRM or/and NIR hyperspectral imaging) have been proposed as complementary methods to the official
method; the optical microscopy. NIR spectroscopy offers the advantage of being rapid, accurate and independent of
human analyst skills. The combination of an NIR detector and a microscope or a camera allows the collection of high
quality spectra for small feed particles having a size larger than 50 μm. Several studies undertaken have demonstrated
the clear potential of NIR microscopic methods for the detection of animal particles in both raw and sediment fractions.
Samples are sieved and only the gross fraction (superior than 250 μm) is investigated. Proposed methodologies have
been developed to assure, with an acceptable level of confidence (95%), the detection of at least one animal particle
when a feed sample is adulterated at a level of 0.1%. NIRM and NIR hyperspectral imaging are running under
accreditation ISO 17025 since 2005 at CRA-W. A quantitative NIRM approach has been developed in order to fulfill the
new requirements of the European commission policies. The capacities of NIRM method have been improved; only the raw fraction is analyzed, both the gross and the fine fractions of the samples are considered, and the acquisition parameters are optimized (the aperture, the gap, and the composition of the animal feed). A mapping method for a faster collection of spectra is also developed. The aim of this work is to show the new advances in the analytical methods developed in the frame of the feed ban
applied in Europe.
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