NS-EN 12821:2000 Foodstuffs — Determination of vitamin D by high performance liquid chromatography — Measurement of cholecalciferol (D3) and ergocalciferol (D2)
2009NS-EN 12821:2009 Foodstuffs — Determination of vitamin D by high performance liquid chromatography — Measurement of cholecalciferol (D3) or ergocalciferol (D2)
2000NS-EN 12821:2000 Foodstuffs — Determination of vitamin D by high performance liquid chromatography — Measurement of cholecalciferol (D3) and ergocalciferol (D2)