1、 KSKSKSKS SKSKSKS KSKSKS SKSKS KSKS SKS KS S KS D 1821 KS D 1821 : 2003 (2013 ) 2003 5 31 http:/www.kats.go.kr : ( ) ( ) ( ) ( ) : (http:/www.standard.go.kr) : : 1974 12 10 : 2003 5 31 : 2013 10 31 : 2013 0584 : ( 02-509-7274) . (http:/www.kats.go.kr) 10 5 , . ICS 71.040.40 KS D 1821:2003 (2013 ) De
2、termination of tantalum in iron and steel 1. . 2. . . KS D 1801 KS D 1825 KS M 0012 KS M 8001 3. . 3.1 3.1.1 , , , . , 430 nm , 430 nm , . 3.1.2 a) b) c) d) ( ) e) (1 50) f) g) (1 1) h) i) (4 %) j) k) (1 3) l) (50 %) . m) 6 g 100 mL . . n) o) (30 %) (SnCl22H2o) 30 g 50 mL , 100 mL . p) (0.15 mg Ti/m
3、L) KS M 8001 . D 1821: 2003 2 q) (0.25 mg Ta/mL) (K2TaF7) 0.272 g , (1 1) 10 15 . 4 6 g 2 3 . 150 mL . , 500 mL . 50 mL , . r) (6 %) s) (0.8 mg Nb/mL) (Nb2O5) 1.145 g , 10 g 1 L . t) (0.1 mg W/mL) KS M 8001 . 3.1.3 KS M 0012 . 3.1.4 a) 2g (400 mL) , 20 mL 5 mL , . 25 mL , 10 . b) 175 mL 50 mL , 5 ,
4、. , 60 70 3 4 . c) (5 C) (1 50) . (1 50) . , (1 50) 10 (1). d) (30 40mL) , 1000 10 . e) (1 1) 3 5mL . f) (2) 4 g , 500 1 . (1 50) 100 mL (400 mL) . g) (1 50) 100 mL , 40 mL 5 b) d) . h) (2) 3 5 g , 7 650 700 . 5 . i) (250 mL) , 50 mL , . . (100 mL) . j) 50 mL (100 mL) (1 3) 10 mL , 70 mL . 20 mL . 1
5、5 . i) 50 mL 20 mL , 430 nm (A) (Ac) (4). Ac = A - (B+C+D) Ac: A: D 1821: 2003 3 B: 430 nm C: 430 nm D: 430 nm k) (3) . Ta(%) 100FSW W: (g) S: (g) F: (1) . (2) . (3) (0.25 mg Ta/mL) 1.0, 3.0, 5.0, 7.0, 9.0, 12.0 15.0 mL (100 mL) , (1 3) 10 mL 70 mL . 20 mL . 15 , 430 nm . (4) a) 1) 3.1.4 i) 5 mL (15
6、0 mL) , 10 mL (1 3) 1 mL , 10 . 1 , , 50 mL . (100mL) , 10 mL 3 4 . 15 . i) 400 nm 520 nm . 2) (0.015 mg Ti/mL) 1.0, 2.0, 4.0 6.0 mL 4 (150 mL) , (4) a) 1) . 100 mL mg 400 nm 520 nm . 3) (0.8 mg Nb/mL) 1.0, 5.0, 10.0 15.0 mL (100 mL) , 100 mL mg . (5) B . 4) 3.1.4 i) 20 mL (25 mL) , (1 1) 1 mL 1 mL
7、, . 430 nm , mg , 2 50 mL mg . b) 400 nm (Ac) 400 A (B+C) D 1821: 2003 4 520 nm (Ac) 520 D E A: 400 nm B: 400 nm (4) a) 4) (4) a) 2) . C: 400 nm , . D: 520 nm E: 520 nm B . (5) (0.1 mg Nb/mL) (0.1mg W/mL) 0.0, 2.0, 4.0 6.0 mL 8 (150 mL) , (4) a) 1) 400 nm 520 nm . ( /mg) . 400 nm 520 nm X 400 X 520,
8、 400 nm 520 nm Y 400 Y 520 . , b , (4) b) , , b . X 400 Y 400b (Ac) 400 X 520 Y 520b (Ac) 520 . 430 nm 400 nm, 520 nm . . 135 513 701 7 (02)6009 4867 (02)6009 4887 8 http:/ KS D 1821 : 2003 KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Determination of tantalum in iron and steel ICS 71.040.40 Korean Agency for Technology and Standards http:/www.kats.go.kr