1、 KSKSKSKSKSKSKSK KSKSKS KSKSK KSKS KSK KS KS E 3085 EDTA KS E 3085: 2012 2012 10 5 http:/www.kats.go.krKS E 3085:2012 : ( ) ( ) () ( ) : (http:/www.standard.go.kr) : :1992 12 31 :2012 10 5 2012-0512 : : ( 02-509-7274) (http:/www.kats.go.kr). 10 5 , . KS E 3085:2012 EDTA Chromium ores Method for dete
2、rmination of magnesium EDTA titrimetric method 1 . . 2 . . ( ) . KS E 3056, KS M 0015, KS M 8001, KS Q 5002, 1: 3 KS E 3056 . 4 (EDTA .) . 3 %( ) . 5 EDTA 5.1 . . , , 2 1 pH KS E 3085:2012 2 EBT EDTA . pH EDTA . 5.2 . a) b) (1: 1, 1: 3, 1: 100) c) d) e) f) g) (1: 1) h) i) (1: 100) j) (400 g/L) k) am
3、monium peroxodisulfate, (NH4)2S2O8 (200 g/L) l) (5 g/L) m) n) 68 g 400 mL 570 mL 1 000 mL . o) EDTA (9.306 g C10H14O8N2Na2 2H2O/L)(0.025 mol/L) , KS M 8001 . p) (C52H54O12N4) (2 g/L ) q) T(EBT) KS M 8001 . r) (C30H26O13N)1, (C28H30O4)1, 100 . 5.3 0.50 g 0.1 mg . KS E 3085:2012 3 5.4 5.4.1 a) (5.3) (
4、300 mL) 30 mL 5 mL . ( ) 1) . 100 mL 10 mL 2) (5 B) . ( ) . 10 12 (300 mL) 100 mL . b) a) (30 ) . (1: 1) 2 3 5 mL . 2 g 3) . 5.4.2 5.4.1 (200 g/L) 5 mL 2 mL 3 mL . 5 . pH pH 7 8 (5 A) . (1: 100) 5 6 (300 mL) . (1: 3) 40 50 mL (1: 100) 10 12 . (200 g/L) 5 mL 2 3 mL , 5 . pH pH 7 8 (5 A) . (1: 100) 5
5、6 . . 200 mL . (250 mL) . 5.4.3 a) 5.4.2 50 mL (300 mL) 5.2 n) 30 mL (5 g/L) 2 mL 100 150 mL . EBT 4 5 0.025 mol/L 1) 5 10 mL .2) .3) .KS E 3085:2012 4 EDTA 5.2 o) ( .) (V1).4)b) 5.4.2 50 mL (300 mL) 3 4 (500 g/L) 8 10 mL . 200 250 mL 5.2 r) 0.1 0.15 g 0.025 mol/L EDTA 5.2 o) (V3). 5.5 5.4.1 5.4.3 .
6、 5.6 5.6.1 KS Q 5002 2 . 1005/16607000.0)()(Mg4321=mVVVV Mg : %( ) V1 : 5.4.3 0.025 mol/L EDTA 5.2 o) (mL) V2 : 5.5 0.025 mol/L EDTA 5.2 o) (mL) V3 : 5.4.3 0.025 mol/L EDTA 5.2 o) (mL) V4 : 5.5 0.025 mol/L EDTA 5.2 o) (mL) m : (g) KS Q 5002 2 . 1005/1002001.0)(Ca43=mVV Ca : %( ) V3 : 5.4.3 0.025 mol
7、/L EDTA 5.2 o) (mL) V4 : 5.5 0.025 mol/L EDTA 5.2 o) (mL) m : (g) 4) 40 50 .KS E 3085:2012 5 5.6.2 (MaO) %( ) KS Q 5002 2 . MgO Mg1.658 1 MgO : %( ) 5.6.3 (CaO) %( ) KS Q 5002 2 . CaO Ca1.399 2 CaO : %( ) 5.7 1 . 1 : %( ) 3.83 13.43 0.008 6Mg %( ) 0.056 0.010 5Mg %( ) 0.258 KS E 3056 4.8 . EDTA 153787 1 92 3(13) (02)26240114 (02)262401489 http:/ Korean Agency for Technology and Standards http:/www.kats.go.kr KS E 3085:2012 KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Chromium oresMethod for determination of magnesium EDTA titrimetirc method ICS 71.040.40; 73.060