標準號：BS EN 15452-2008
中文標準名稱：肥料.螯合劑的測定.用反相高效液相色譜法(HPLC)測定o,p-EDDHA螯合的鐵
英文標準名稱：Fertilizers - Determination of chelating agents - Determination of iron chelated by o,p-EDDHA by reversed phase HPLC
標準類型：G20
發布日期：2008/8/29 12:00:00
實施日期：2008/8/29 12:00:00
中國標準分類號：G20
國際標準分類號：65.080
引用標準：EN 1482-2
適用范圍：This European Standard specifies a method for the chromatographic determination of the amount of ironchelated by each of the individual isomers of the chelating agent ortho-para EDDHA (o,p-EDDHA) in fertilizers.The method allows the identification of this chelating agent and the determination of the water soluble fractionof iron chelated by this chelating agent. The method is not applicable for the determination of the amount offree chelating agent.NOTE 1 This method has been shown to be also suitable for the determination of the amount of iron chelated by eachof the individual isomers of the chelating agent ortho-ortho EDDHA (o,o-EDDHA) in fertilizers.NOTE 2 o,o-EDDHA and o,p-EDDHA are abbreviations used in this European Standard for the sake of simplicity. Forcomplete names see Annex C.NOTE 3 The substances o,o-EDDHA and o,p-EDDHA both exist as different stereoisomers. For o,o-EDDHA a mesoform and a d/l pair (the racemic isomers) exist, for o,p-EDDHA two different d/l pairs exist. All four stereoisomers areobserved separately in this method.NOTE 4 Currently, an analytically pure standard only exists for o,o-EDDHA. The method for o,p-EDDHA has beendeveloped with an o,p-EDDHA standard containing an uncertain concentration of o,p-EDDHA.