NEN-ISO 9622:2013 en

Melk en vloeibare melkproducten - Richtlijnen voor het gebruik van mid-infrarood spectrometrie


Over deze norm

Status Definitief
Aantal pagina's 14
Commissie Melk en zuivelproducten
Gepubliceerd op 01-09-2013
Taal Engels
This International Standard provides guidance on the quantitative compositional analysis of milk and liquid milk products, such as raw milk, processed milk, cream and whey, by measurement of the absorption of mid-infrared radiation. Additional built-in instrument features, such as a conductivity sensor, may improve the performance in the determination of compositional parameters and allow for the estimation of other parameters. The guidance described is applicable to the analysis of cow's milk.

The guidance is also applicable to the analysis of milk of other species (goat, ewe, buffalo, etc.) and derived liquid milk products, provided that adequate calibrations are generated for each application and adequate control procedures are in place. The application is limited to lower viscosity products that can be pumped through the flow system of the analyzer and to analytes that do not result in optical saturation at the specific wavelengths being utilized.

De principle van de ISO 9622:
After pretreatment and homogenization, where required, the sample is measured with an infrared spectrometer that records the quantity of radiation absorbed in transmittance at specific wavelengths in the mid-infrared region. The spectral data are transformed into estimates of constituent concentrations or other physico-chemical parameters through calibration models developed on representative samples from the population to be tested. For some parameters, i.e. freezing point equivalents, signals from additional installed sensors may be fed to the calibration model.


ICS-code 67.100.10
Nederlandse titel Melk en vloeibare melkproducten - Richtlijnen voor het gebruik van mid-infrarood spectrometrie
Engelse titel Milk and liquid milk products - Guidelines for the application of mid-infrared spectrometry



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