GOST EN 15451-2013 Fertilizers Determination of chelating agents Determination of iron chelated by EDDHSA by ion pair chromatography《肥料 螯合剂的测定 使用离子对色谱法测定EDDHSA螯合的铁》.pdf

1、 EN 15451 2013 III , . ( ) . , , 2014 -, EN 15451 2013 25 5.1 a) .b) , , -, 1 EN ISO 3696.c) - () 99 %, .5.2 , c(NaOH) = 0,5 /3: , - , 20 NaOH 1 3, .5.3 , c(NaOH) = 0,1 /3: , - , 4 NaOH 1 3, .5.4 , c(HCl) = 1 /3: 88 3 (35 % HCl) 1000 3 .5.5 , c(HCl) = 0,1 /3: 50 3 (5.4) 500 3 .5.6 (III) , (Fe) = 105

2、0 /3: 0,7594 - (III) Fe(NO3)39H2O 100 3 . 100 3. . (, AAS), Fe - (1050 30) /3. Fe(NO3)39H2O , Fe3+/EDDHSA (5.7) .5.7 Fe3+/EDDHSA, (Fe) = 100 /3: 0,2330100/P P - H6EDDHSA, Fe (III) pH 6 ( pH), (2-5-) - (EDDHSA) 150 3 2,7 3 NaOH (5.2). - 25 3 Fe (5.6) , 5 . pH 7,0 NaOH (5.3). , . (250 3) .5.8 , :a) A: 3,33 3 TBAOH (40 %- ( ) - ) 500 3 . pH 6,0 (5.4 5.5). 350 3 ( HPLC) 1 3. 6.4, b) 0,2 .b) B: 3,33 3 TBAOH (40 %- ( ) - ) 500 3 . pH 6,0 (5.4 5.5). 750 3 ( HPLC) 1 3. 6.4, b) 0,2 . 1 TBACl TBABr , pH 6,0 NaOH HCl.2 , .6 6.1 , : 6.2 .6.3 , : EN 15451 2013 5 ,