標準號：DIN EN ISO 13884-2005
中文標準名稱：動物和植物脂肪和油.用紅外光譜測定法測定孤立的反式異構體
英文標準名稱：Animal and vegetable fats and oils - Determination of isolated trans isomers by infrared spectrometry (ISO 13884:2003);English version of DIN EN ISO 13884:2005
標準類型：X14
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：X14
國際標準分類號：67.200.10
引用標準：ISO 661;ISO 5509
適用范圍： This International Standard specifies a method for the accurate determination of isolated trans bonds in natural or processed long-chain fatty acids, fatty acid esters and triglycerides with trans isomer levels ≥ 5 %.The method is not applicable, or is applicable only with specific precautions, to fats and oils containing high levels (over 5 %) of conjugated unsaturation (e.g. tung oil), materials containing functional groups which modify the intensity of the C-H deformation about the trans double bond [e.g. castor oil containing ricinoleic acid or its geometrical isomer, ricinelaidic acid (12-hydroxy-9-octadecenoic acid)], mixed triglycerides having long- and short-chain moieties (such as diacetostearin), or in general, any materials containing constituents which have functional groups which give rise to specific absorption bands at or sufficiently close to interfere with the 966 cm-1 band of the C-H deformation of the isolated trans double bond.NOTE Dienes, such as cis-trans and trans-trans dienes, can affect the calibration.For accurate determinations on materials with trans levels below 5 %, a standardized capillary GLC method isrecommended (for example, see ISO 15304).