EN 15948:2015

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Getreide - Bestimmung der Feuchte und des Proteins - Verfahren der Nahinfrarot-Spektroskopie bei ganzen KörnernCéréales - Détermination de la teneur en eau et en protéines - Méthode utilisant la spectroscopie dans le proche infrarouge sur des grains entiersCereals - Determination of moisture and protein - Method using Near-Infrared-Spectroscopy in whole kernels67.060QMLKCereals, pulses and derived productsICS:Ta slovenski standard je istoveten z:EN 15948:2015SIST EN 15948:2015en,fr,de01-junij-2015SIST EN 15948:2015SLOVENSKI
STANDARDSIST EN 15948:20121DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15948
March 2015 ICS 67.060 Supersedes EN 15948:2012English Version
Cereals - Determination of moisture and protein - Method using Near-Infrared-Spectroscopy in whole kernels
Céréales - Détermination de la teneur en eau et en protéines - Méthode utilisant la spectroscopie dans le proche infrarouge sur des grains entiers
Getreide - Bestimmung der Feuchte und des Proteins - Verfahren der Nahinfrarot-Spektroskopie bei ganzen Körnern This European Standard was approved by CEN on 5 January 2015.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
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Results of examples of interlaboratory test . 12 A.1 FOSS interlaboratory test . 12 A.2 PERTEN interlaboratory test . 17 A.3 CHOPIN Technologies interlaboratory test . 21 Annex B (informative)
Validation of ANN prediction model WB003034 . 29 B.1 ANN prediction model WB003034 with associated database . 29 B.2 Results of validation according to EN ISO 12099 . 29 B.3 Stability and robustness . 31 Annex C (informative)
Validation of Inframatic 9500 prediction models . 33 C.1 Perten Inframatic 9500 prediction models . 33 C.2 Results of validations according to EN ISO 12099 . 33 SIST EN 15948:2015

Validation of Infraneo prediction models . 39 D.1 CHOPIN Technologies Infraneo prediction models . 39 D.2 Results of validation according to EN ISO 12099 . 39 Bibliography . 45
Moisture Wheat and barley Protein Wheat Protein Barley Overall accuracy expressed as SEP as constituent % w/w 0,24 % 0,27 % 0,27 % Constituent concentration in the independent validation data set Min 8 % 7 % d.m. 7 % d.m. Max 22 % 20 % d.m. 16 % d.m. NOTE The minimum performance given in Table 1 includes the variation of reference data as documented by the number of reference labs involved, regional and genetic variations, the number of countries and crop species involved and the robustness over the last five years (see also Annex B). 5.5 Update of calibration model and validation of new model The prediction model in accordance with this standard shall be updated by the one issuing the calibration model to ensure inclusion of new climatic crop conditions and new varieties introduced on the market. These updates shall be made by keeping the original database with addition of the new samples as needed. The new prediction model shall be updated according to EN ISO 12099. Validation shall be made according to the initial validation (5.4) and include at least 20 new samples. 6 Sampling Sampling is not part of the method specified in this European Standard. A recommended sampling procedure is given in EN ISO 24333 [5]. It is important that the sample analyzed in routine is truly representative for the batch and has not been damaged or modified. 7 Procedure 7.1 Preparation of the test sample No specific sample preparation is required. 7.2 Measurement Follow the instructions of the instrument manufacturer. 7.3 Local validation of the method Before use, the method shall be validated on an independent test set that is representative of the sample population to be analyzed. For the determination of bias, at least 10 samples are needed; for the determination of Standard Error of Prediction (SEP, see EN ISO 12099:2010, 6.5) at least 20 samples are SIST EN 15948:2015

are the numbers of test results corresponding to each of the averaged values; CDr (protein) = 0,30; CDr (moisture) = 0,11. 9.2.4.3 Comparison of two groups of measurements in two laboratories The critical difference (CD) between two averaged values obtained in two different laboratories from two test results under repeatability conditions is equal to: 22221211281280522RrRr,,,CDssssnn=−−−=− where rs is the standard deviation of repeatability; Rs is the standard deviation of reproducibility; 1n and 2n are the number of test results corresponding to each of the averaged values; CDR (protein) = 0,32; CDR (moisture) = 0,23. SIST EN 15948:2015

Results of examples of interlaboratory test A.1 FOSS interlaboratory test An interlaboratory test, organized by the company FOSS Analytical AB (Sweden) in 2008, involving 20 participants from 12 countries was carried out on 6 wheat and 4 barley samples from the 2007 harvest, containing protein and moisture in various concentrations. The participants were the master labs of European grain networks. The grain networks did also assist in the collection of the samples (Table A.1). The results obtained were subjected to statistical analysis in accordance with ISO 5725-1 and ISO 5725-2 to calculate the precision data shown in Table A.2 to Table A.5. Table A.1 — Samples for the interlaboratory study Sample Description Country of origin B1 Spring barley (2-row, malting barley) UK B2 Spring barley (2-row, feed barley) Denmark B3 Spring barley (2-row, malting barley) Denmark B4 Winter barley (6-row, malting barley) France W1 Spring wheat (hard) Germany W2 Spring wheat (hard) France W3 Winter wheat (hard) UK W4 Spring wheat (soft) Germany W5 Winter wheat (hard) Italy W6 Durum wheat Italy SIST EN 15948:2015

Key X
% protein (dm) Y
s% 1
Ì sr 2
◼◼ SR 3
Linear (sR) 4
Linear (sr) Figure A.1 — Standard deviations for the repeatability, sr, and reproducibility, sR, as a function of the protein content SIST EN 15948:2015

Key X
% moisture Y
s% 1
Ì sr 2
◼◼ SR 3
Linear (sR) 4
Linear (sr) Figure A.2 — Standard deviations for th
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