Detection of ergot bodies in cereals by hyperspectral NIR imaging

  • Vermeulen, P. , Dardenne, P. , Baeten, V. & Fernández Pierna, J.A. (2010). Detection of ergot bodies in cereals by hyperspectral NIR imaging. Poster in: IASIM 2010, Dublin - Ireland, 18-19 November 2010.
Type Poster
Year 2010
Title Detection of ergot bodies in cereals by hyperspectral NIR imaging
Event name IASIM 2010
Event location Dublin - Ireland
Label U15-1523
Recnumber 681
Event date 18-19 November 2010
Endnote Keywords ergot|cereals|food and feed safety|NIR hyperspectral imaging|push-broom|whisk-broom|
Abstract Contamination of cereals with ergot (Claviceps purpurea) is well known. For the farmer, the damage caused by ergot is a yield reduction: the ergot replaces the kernels in the grain ears. For the feed and food sectors, the presence of ergot involves high toxicity risk for animal and human due to toxic alkaloids presence in the ergot. To reduce the risk of poisoning, the European directive 2002/32/EC on undesirable substances in animal feed fixed a limit in the EU of 0.1% for ergot in all feedingstuffs containing unground cereals. The regulation (EEC) No 689/92 restricted to 0.05% the concentration of ergot bodies in cereals for humans. The current work, performed in the framework of the CONffIDENCE project ( ), aims to assess by hyperspectral NIR imaging the presence of ergot bodies in cereals. For this study, several samples of wheat contaminated with different percentages of ergot were prepared and measured using two NIR hyperspectral imaging instruments, a plane scan and a line scan system. The NIR hyperspectral plane scan or whisk-broom imaging system uses an InGaAs focal plane array detector and a liquid crystal tunable filter (LCTF) for wavelength selection. All images consist of 320 x 240 pixels that are acquired at 81 wavelength channels: 900-1700 nm with a spectral resolution of 10 nm, 16 Coadds at each wavelength and 4 scans by image. The NIR hyperspectral line scan or push-broom imaging system uses a cooled, temperature stabilized MCT (Mercury-Cadmium-Telluride) detector, combined with a conveyor belt. All images consist of lines of 320 pixels that are acquired at 209 wavelength channels: 1100-2400 nm with a spectral resolution of 6.3 nm and with 32 scans by image. Different chemometric techniques have been applied on the acquired images in order to assess the number of ergots. This study has shown the potential of the two NIR hyperspectral imaging techniques to detect and quantify the ergot bodies in cereals.
Caption U15-1523-vermeulen-2010.pdf
Authors Vermeulen, P., Dardenne, P., Baeten, V., Fernández Pierna, J.A.


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