1、 KS D ISO 4748KSKSKSKS SKSKSKS KSKSKS SKSKS KSKS SKS KS KS D ISO 4748 : 2002 (2007 ) 2002 11 28 http:/www.kats.go.kr . ICS 77.120.30 KS D ISO 4748 2002 Copper alloys Determination of iron content Na 2 EDTA titrimetric method 1984 ISO 4748 1984(E)(Copper alloys Determination of iron content Na 2 EDTA
2、 titrimetric method) , . . . (III) , pH 4.5 EDTA . . 1.19 g/mL 30 %(m/m) (methyl isobutyl ketone, MIBK) ( ) 100 mL 100 mL . (LiCl) 275 g , 1 L . (NH 4 F) 37 g , 1 L . (H 2 NCSNH 2 ) 100 g , 1 L . 200 g , 1 L . 0 .0 5 mol/L Na 2 EDTA 18.61 g 1 000 mL (volumetric flask) . (III) ( ) . 0.05 mol/L 3.269
3、g (1 1) 25 mL . . ( ) pH 4 5 . 1 000 mL D ISO 4748 2002 2 , . III 0.05 mol/L (III)(Fe 2 O 3 ) 3.992 g ( ) 40 mL . 1 000 mL , . 100 g 1 g . 1.000 g 0.001 g 250 mL . , ( ) ( ) 10 mL ( ) , ( ) 10 mL . 5 . 150 mL . ( ) . 50 mL . MIBK( ) 30 mL 1 . . MIBK( ) 20 mL 1 . . 30 ( ) 20 mL . . ( ) 20 mL . 50 mL
4、400 mL . ( ) 2 mL . ( ) 100 mL , ( ) ( 1 ). ( ) 5 mL Na 2 EDTA ( )( 2 ) 20.00 mL . ( ) pH 4.5 0.1 . 0.1 g ( ) . . ( 1 ) (stannic acid) . . . ( 2 ) Na 2 EDTA 5 %(m/m) . 5 % Na 2 EDTA . . (%) , . m V F V 100 793 002 . 0 ) ( 2 1 D ISO 4748 2002 3 m V F V 3 279 . 0 ) ( 2 1 = V 1 Na 2 EDTA ( ) (mL) V 2 (
5、 ) (mL) F Na 2 EDTA (factor)(0.05 mol/L) m (g)( ) 0.002 793 0.05 mol/L Na 2 EDTA 1 mL (g) . 2 7 . 1 2 , %(m/m) , , r , R1.92 0.013 0.024 4.54 0.019 0.038 . 4 KS D ISO 4748 2002 , . Na 2 EDTA ( 0.3 7.5 %), (A 0.06 6.0 %, B 0.000 1 0.4 %), ( 0.01 6.0 %), ( 0.01 6.0 %) . Na 2 EDTA . (KS) (ISO) , . 1984
6、 ISO 4748(Copper alloys Determination of iron content Na 2 EDTA titrimetric method) , “ Na 2 EDTA ” . SI . Na 2 EDTA . , MIBK , . , EDTA pH 4.5 0.1 . KS D ISO 4748 : 2002 KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Copper alloys Determination of iron content Na 2 EDTA titrimetric method ICS 77.120.30 Korean Agency for Technology and Standards http:/www.kats.go.kr
