Amino Acid contents in raw materials can be precisely analyzed in a global network of near-infrared spectrometers: collaborative trials prove the positive effects of instrument standardization and repeatability files |
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| Authors: | Fontaine Johannes Hörr Jutta Schirmer Barbara |
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| Institution: | Degussa AG, Feed Additives, Applied Technology, PO Box 1345, D-63403 Hanau, Germany. johannes.fontaine@degussa.com |
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| Abstract: | Four international ring trials for NIRS amino acid analysis of feed raw materials have demonstrated for the first time that the calibrations developed by Degussa allow reliable and precise predictions of essential amino acids in up to 44 NIR spectrometers. Different standardization techniques were compared, and the effectiveness of using spectra of the host instruments as repeatability files was studied. The ultimately achieved reproducibility of 2-3% CV for almost all analyses in the network is considerably better than ring trial results for wet chemical amino acid analysis. |
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