Livsmedelsteknik

Kommittébeteckning: SIS/TK 413 (Provning av flytande och gasformiga bränslen)
Källa: CEN
Svarsdatum: den 13 feb 2020
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The purpose of this European Standard is to determine the free glycerol and residual mono-, di- and triglyceride contents in fatty acid methyl esters (FAME) intended for addition to mineral oils. The total glycerol content is then calculated from the obtained results. Under the conditions described, the quantification limits are 0,001 % (m/m) for free glycerol, 0,10 % (m/m) for all glycerides (mono-, di- and tri-). This method is suitable for FAME prepared from rapeseed, sunflower, soybean, palm, animal oils and fats and mixture of them. It is not suitable for FAME produced from or containing coconut and palm kernel oils derivatives because of overlapping of different glyceride peaks. NOTE For the purposes of this European Standard, the term "% (m/m)" is used to represent respectively the mass fraction. WARNING - The use of this method may involve hazardous equipment, materials and operations. This method does not purport to address to all of the safety problems associated with its use. It is the responsibility of the user of this standard to take appropriate measures to ensure the safety and health of personnel prior to application of the standard, and fulfil statutory and regulatory requirements for this purpose.

Kommittébeteckning: SIS/TK 413 (Provning av flytande och gasformiga bränslen)
Källa: CEN
Svarsdatum: den 13 feb 2020
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This European Standard specifies a method for the determination of the oxidation stability of fatty acid methyl esters (FAME) at 110 °C, by means of measuring the induction period up to 48 h. NOTE 1 EN 15751 [1] describes a similar test method for oxidation stability determination of pure fatty acid methyl esters and of blends of FAME with petroleum-based diesel containing 2 % (V/V) of FAME at minimum. NOTE 2 The precision statement of this test method was determined in a Round Robin exercise with induction periods up to 8,5 h, thus covering the limit value in EN 14214. Results from precision studies on EN 15751 indicate that the precision statement is valid for induction periods up to 48 h but not for higher values. NOTE 3 Limited studies on EN 15751 with EHN (2-ethyl hexyl nitrate) on FAME blends indicated that the stability is reduced to an extent which is within the reproducibility of the test method. It is likely that the oxidation stability of pure FAMEs is also reduced in the presence of EHN when EN 14112 is used for testing.

Kommittébeteckning: SIS/TK 435 (Livsmedel och foder)
Källa: ISO
Svarsdatum: den 21 feb 2020
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This document specifies a method for the determination of total or free choline and carnitine in infant formula and adult nutritionals by liquid chromatography and tandem mass spectrometry.

Kommittébeteckning: SIS/TK 435 (Livsmedel och foder)
Källa: ISO
Svarsdatum: den 21 feb 2020
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This document specifies a method for the simultaneous quantitative determination of four water-soluble vitamins in infant formula and related nutritional products, including relevant forms of vitamins B1, B2, B3 and B6 by enzymatic digestion and UHPLC-MS/MS.

Kommittébeteckning: SIS/TK 435 (Livsmedel och foder)
Källa: ISO
Svarsdatum: den 21 feb 2020
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This document specifies a method for the quantitative determination of β-carotene and lycopene in infant formula and adult nutritionals in solid (i.e. powders) or liquid (i.e. ready-to-feed liquids and liquid concentrates) forms using reversed phase ultra high performance liquid chromatography and UV-visible detection. The application range runs from 1 μg/100 g to 1 500 μg/100 g for lycopene and from 1 μg/100 g to 2 250 μg/100 g for β-carotene. Based on the single-laboratory validation, the limit of detection (LOD) was 0,1 μg/100 g and the limit of quantification (LOQ) was 0,3 μg/100 g for each carotenoid. The method is not applicable to materials that contain measurable levels of β-apo-8'-carotenal. The reproducibility data meets the requirements given in Reference [8] and [10].

The informative Annex C of this document specifies the determination of lutein. The reproducibility data does not meet the requirements given in Reference [9].