Standard Svensk standard · SS-EN 15652:2009

Foodstuffs - Determination of niacin by HPLC

Status: Gällande

Köp denna standard

Standard Svensk standard · SS-EN 15652:2009

Foodstuffs - Determination of niacin by HPLC
Prenumerera på standarden - Läs mer Dölj
Pris: 1 013 SEK
standard ikon pdf

PDF

Pris: 1 013 SEK
standard ikon

Papper

Pris: 1 620,80 SEK
standard ikon pdf + standard ikon

PDF + papper

Fler alternativ Färre alternativ
Provläs denna standard
Omfattning
This European Standard specifies a method for the determination of the mass fraction of niacin in foodstuffs by high performance liquid chromatography (HPLC) by three different ways of hydrolysis, acid hydrolysis (A), enzymatic hydrolysis (B) or acid/alkaline hydrolysis (C). The method has been validated in interlaboratory tests on fortified and non-fortified samples such as breakfast cereal powder, chocolate cereals, cooked ham, green peas, lyophilized green peas with ham, lyophilized soup, nutritive orange juice, milk powder and wheat flour, at levels from 0,5 mg/100 g to 24 mg/100 g. For further information on the validation data, see Annex B. A and B give similar results for niacin. In options A and B niacin is calculated as the sum of nicotinamide and nicotinic acid, and expressed as nicotinic acid [1]. Option C gives higher results than A and B for niacin with non-supplemented cereals, but similar results for other products. In option C, niacin is calculated and expressed as nicotinic acid after transformation of nicotinamide into nicotinic acid [2]. Option A is faster and cheaper than B and C. Option B is used if an exact quantification of nicotinamide and nicotinic acid is needed. This cannot be done with option A, because there is a slight transformation of nicotinamide into nicotinic acid during the acid hydrolysis. Option C quantifies total niacin. The alkaline hydrolysis is able to liberate other forms giving higher results for niacin, which in some foods such as maize and cereals are not normally biologically available, see [3], [4] and [5]. Information on a comparison between the three different ways of hydrolysis is given in Annex C.

Ämnesområden

Generella metoder för kontroll och analys av livsmedel (67.050)


Köp denna standard

Standard Svensk standard · SS-EN 15652:2009

Foodstuffs - Determination of niacin by HPLC
Prenumerera på standarden - Läs mer Dölj
Pris: 1 013 SEK
standard ikon pdf

PDF

Pris: 1 013 SEK
standard ikon

Papper

Pris: 1 620,80 SEK
standard ikon pdf + standard ikon

PDF + papper

Fler alternativ Färre alternativ

Produktinformation

Språk: Engelska

Framtagen av: Livsmedelsanalyser, SIS/TK 435/AG 05

Internationell titel: Foodstuffs - Determination of niacin by HPLC

Artikelnummer: STD-69986

Utgåva: 1

Fastställd: 2009-06-05

Antal sidor: 32