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  • THE CERTIFICATION OF THE CONTENTS (MASS FRACTIONS) OF NITROGEN, PHOSPHORUS, CHLORIDE, SODIUM, POTASSIUM, MAGNESIUM AND CALCIUM AND OF THE KJELDAHL NITROGEN CONTENT IN A SKIM POWDER

Abstract

The experimental procedures for the preparation of a skim milk powder, and the certification of the contents of the following elements (expressed as mass fractions): nitrogen, phosphorus, chlorine, sodium, potassium, magnesium and calcium, as well as the certification of the Kjeldahl nitrogen content, are reported. For the Kjeldahl nitrogen the method according to the IDF Standard 114: 1982 Annex A (given in the annex of this report) was applied. For the other elements a range of different techniques was used: flame emission and absorption spectrometry, gravimetry, plasma emission spectrometry, neutron activation analysis, titrimetry, ion chromatography, direct potentiometry, spectrophotometry and catharometry after appropriate sample treatments. The technical evaluation of the analytical methods used, are also presented together with the statistical approach by which the certified values and their uncertainties were drawn from the analytical results.

Additional information

Authors: GRIEPINK B, CEC BRUXELLES (BELGIUM);JRC ISPRA ESTAB. (ITALY);GONSKA H, CEC BRUXELLES (BELGIUM);JRC ISPRA ESTAB. (ITALY);MUNTAU H CEC BRUXELLES (BELGIUM), CEC BRUXELLES (BELGIUM);JRC ISPRA ESTAB. (ITALY);JRC ISPRA ESTAB. (ITALY), CEC BRUXELLES (BELGIUM);JRC ISPRA ESTAB. (ITALY)
Bibliographic Reference: EUR 9138 EN (1983) MF, 59 P., BFR 120, BLOW-UP COPY BFR 295, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989122054300 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en