1、 KSKSKSKS SKSKSKS KSKSKS SKSKS KSKS SKS KS S KS D 1825 KS D 1825 : 2003 (2013 ) 2003 5 31 http:/www.kats.go.kr : ( ) ( ) ( ) ( ) : (http:/www.standard.go.kr) : : 1971 10 30 : 2003 5 31 : 2013 10 31 : 2013 0584 : ( 02-509-7274) . (http:/www.kats.go.kr) 10 5 , . ICS 77.080.20 KS D 1825:2003 (2013 ) De
2、termination of niobium in iron and steel 1. . 2. . . KS D 1801 KS M 0012 KS M 8001 3. . 3.1 , . 2 . 3.2 a) b) c) d) e) (1+49) f) g) h) (1+1) i) (4%) j) k) (1+3) l) (50% ) . m) 6g 100mL . . h) (30%) (SnCl22H2O) 30g (1+1) 100mL . o) (0.15mg Ti/mL) KS M 8001 . p) (0.25mg Ta/mL) (K2TaF7) 0.272g (1+1) 10
3、 15 . 4 6g , 2 3 . 150mL (1). (500mL) 500mL . 50.0mL 15mL (6% D 1825: 2003 2 ) (Ta2O5) . q) (0.8mg Nb/mL) (4K2O3Nb2O516H2O) 1g 6 8g , . r) (0.1mg W/mL) (Na2WO42H2O) 0.0897g 500mL . 3.3 KS M 0012 2. . 3.4 a) 2g(2) (400mL) 20mL 5mL , . 25mL 10 . b) 175mL 50mL 5 , . , 60 70 3 4 . c) (1+49) . (1+49) . (
4、l: 49) 10 (3). d) (30 40mL) 1 000C 10 . e) (1+1) 3 5mL . f) (4) 4g , 500C 1 . (1+49) 100mL (400mL) . g) (1+49) 100mL 40mL 5 , b) d) . h) (4) 3 5g , 1 500C . 5 . i) , (250mL) 50mL . . (100mL) . j) 5mL(5) (150mL) 10mL (1+3) 1mL . 10 . k) 1 , 50mL . (100mL) 10mL 3 4 . 15 . l) h) 400nm 520nm . m) (6) (7
5、) , . 100Nb(%) = SA D 1825: 2003 3 A: (mg) B: (g) (l) , . (2) 0.2% 40g . (3) . (4) . (5) 1cm , 100mL 0 0.4mg, 0 4mg . (6) (0.15mg Ti/mL) 1.0, 2.0, 4.0 6.0mL 4 (150mL) , 3.4 j) l) . 100mL mg 400nm 520nm . (0.025mg Ta/mL) 1.0, 2.0, 3.0, 4.0 5.0mL 5 (150mL) , 3.4 j) l) 400nm , mg(100mL ) . 3.4 i) 20.0m
6、L (25mL) (1+1) 1mL, (30%) 1mL . 430nm , mg 5mL mg . 3.4 i) 50.0mL (100mL) 10mL 60 75mL . 20mL . 15 . , 3.4 h) i) 50mL , 430nm (A) (Ac) . Ac = A (B + C + D) Ac: A: B: 430nm : (0.8mg Nb/mL) 1.0, 5.0, 10.0 15.0mL (100mL) , (6) 430nm 100mL mg . (7) B . C: 430nm : (0.lmg D 1825: 2003 4W/mL) 5.0, 10.0, 15
7、.0, 20.0mL (100mL) (8) , (7) . D: 430nm (0.15mg Ti/mL) 1.0, 2.0, 4.0 6.0mL (100mL) (6) , (6) (mg) . (6) . (0.25mg Ta/mL) 1.0, 3.0, 5.0, 7.0, 9.0, 12.0 15.0mL (100mL) (1+3) 10mL 60 75mL . 20mL . 15 , 430nm . 400nm Ac(400) = A (B + C) 520nm Ac(520) = D E A: 400nm B: 400nm : (6) (6) . C: 400nm : (6) (6
8、) . D: 520nm E: 520nm B . (7) (0.1mg Nb/mL) (0.1mg W/mL) 0.0, 2.0, 4.0 6.0mL 8 (150mL) 3.4 j) 400nm 520nm . ( /mg) . 400nm 520nm X400 X520, 400nm 520nm Y400 Y520 . a, b (6) a, b . X (400)a + Y(400) b = 400 X (520)a Y(520) b = 520 . 430nm (6) 400, 520nm (6) . (6) . 400nm . 101 135 513 701 7 (02)6009 4867 (02)6009 4887 8 http:/ KS D 1825 : 2003 KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Determination of niobium in iron and steel ICS 77.080.20 Korean Agency for Technology and Standards http:/www.kats.go.kr
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