1、KSKSKSKS SKSKSKS KSKSKS SKSKS KSKS SKS KS 2003 5 31 http:/www.kats.go.krKS D 1824 KS D 1824: 2003 (2011 ) D 1824: 2003 : ( ) ( ) INI ( ) : (http:/www.standard.go.kr) : :1 971 10 30 : 2003 5 31 :2011 12 30 2011-0681 : : ( 02-509-72747) (http:/www.kats.go.kr). 10 5 , . ICS 77.120.20; 71.040.40 KS D 18
2、24: 2003(2011 ) Determination of magnesium in iron and steel 1. . 2. . . KS D 1801 KS M 8001 3. . 3.1 , , , EDTA . 3.2 a) (1+1) b) (7+5) c) (1+10) d) e) f) (3 %) g) h) (11) i) j) k) (0.05 %) l) (20 %) m) EDTA (0.01 mol/L) KS M 8001 . 3.3 a) (1) (250 mL) , (1 1) 30 mL , 3 mL . 20 mL , (2). b) (1 1) 2
3、0 mL . 20 mL (5 A) . (1 10) . c) 10mL . (200 mL) , (7 5) 10 mL(3) . 20 mL , 30 . d) , 20 mL . D 1824: 2003 2 (250 mL) , 5 mL (4). e) (1+1) 20 mL 2 . , . f) 50 mL 50 mL , (1+1) (5). 2 3 , , 10 . g) (5 B) . 150 mL . 30 40 , 10 mL pH 10 . h) (6) 4 5 , EDTA , , . Mg(%) 100)(SCBA A: EDTA (mL) B: EDTA (mL
4、) C: EDTA (0.01 mol/L) 1 mL (g) S: (g) (1) 1 . (2) 1 % , 0.5 mL . (3) 6 8 mol/L . (4) , 2 mL . (5) pH 7 . (6) EBT . 1 (%) (g) 0.01 0.3 1.0 0.3 0.5 153787 1 92 3(13) (02)26240114 (02)262401489 http:/ KSKSKSSKSKS KSKS SKS KSKS SKSKS KSKSKSKorean Agency for Technology and Standards http:/www.kats.go.kr KS D 1824: 2003 Determination of magnesium in iron and steel ICS 77.120.20; 71.040.40