1、 KSKSKSKSKSKSKSK KSKSKS KSKSK KSKS KSK KS KS I ISO 6058 (EDTA )KS I ISO 6058:2008 2008 8 7 http:/www.kats.go.krKS I ISO 6058:2008 : ( ) ( ) ( ) : (http:/www.standard.go.kr) ： ： 1998 3 26 ： 2008 8 7 2008-0411 ： ： ( 02-509-7266) (http:/www.kats.go.kr). 10 5 , . KS I ISO 6058:2008 (EDTA ) Water quality
2、 Determination of calcium content (EDTA titrimetric method) 1984 1 ISO 6058, Water quality Determination of calcium content EDTA titrimetric method . 1 EDTA(ethylenediaminetetraacetic acid) , . . . 2 mg/L100 mg/L(0.05 mmol/L2.5 mmol/L) . 100 mg/L . 2 . . KS M ISO 5667 1, 1： KS M ISO 5667 2, 2： KS M
3、ISO 5667 3, 3： KS L ISO 385 1, 1： 3 pH 1213 EDTA 2 . HSN . . EDTA , . . KS I ISO 6058:2008 2 4 . 4.1 (2 mol/L) 8 g 100 mL . . . 4.2 EDTA c(Na2EDTA) 10 mmol/L 4.2.1 EDTA2 (2 )(C10H14N2O8Na2 2H2O) 80 2 3.725 g 1 000 mL . EDTA . 4.2.2 (4.2.1) 7. (4.3) . 20.0 mL (4.3) 50 mL . 4.2.3 (mmol/L) EDTA c1 . 21
4、21VVcc = c2 ： (4.3) (mmol/L) V1 ： (mL) V2 ： 0.01 mol/L EDTA (mL) 4.3 c(CaCO3) = 10 mmol/L 150 2 . (500 mL) 1.001 g . 4 mol/L . . 200 mL . . 3 mol/L . (1 000 mL) . 1 mL 0.400 8 mg(0.01 mmol) . KS I ISO 6058:2008 3 . 4.4 HSN 0.2 g HSN2- -1(2- -4- -1- )-3- (C21 H14N2 O7S 3H2O) (NaCl) 100 g . “ ” . 2,7-
5、 N,N- -( )- - (C30H26N2O13). 5 . 5.1 25 mL 0.05 mL , KS L ISO 385 1 A 6 KS M ISO 5667 1, KS M ISO 5667 2 KS M ISO 5667 3 . 7 7.1 (test portion) 2 mg/L100 mg/L(0.05 mmol/L2.5 mmol/L) . 100 mg/L(2.5 mmol/L) , F . (4.1) . , . 7.2 50.0 mL (250 mL) (4.1) 2 mL , HSN (4.4) 0.2 g , (5.) 0.01 mol/L EDTA . .
6、. EDTA . 8 cCa mmol/L , . 031CaVVcc = c1 ： EDTA (mmol/L) KS I ISO 6058:2008 4 V0 ： (mL) V3 ： EDTA (mL) Ca mg/L . 031aCVVc= A A： (40.08) , F . 9 30 mg/L100 mg/L 5 mg/L . 10 . . . , , , , , , , , , . 1 mg/L pH . (100 mg/L 2.5 mmol/L ) . . 30 mg/L 250 mg . , , , . . . . 11 . a) b) c) 1 mg/L , 0.02 mmol
7、/L d) ( ) e) KS I ISO 6058:2008 5 1 AMERICAN PUBLIC HEALTH ASSOCIATION, AMERICAN WATERWORKS ASSOCIATION, WATER POLLUTION CONTROL FEDERATION, JOINT EDITORIAL BOARD. Standard Methods for the Examination of Water and Wastewater, 15th ed., Denver, Colorado, USA , 1980, p. 185 2 SCHWARZENBACH, G. and FLA
8、SCHKA, H. Complexometric Titrations, 2nd ed., New York, Barnes & Noble, 1969 3 WHO. International Standards for Drinking Water, Geneva, World Health Organization, 1971 (EDTA ) 135513 7017 (02)60094114 (02)600948878 http:/ Korean Agency for Technology and Standards http:/www.kats.go.kr KS I ISO 6058:2008 KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Water qualityDetermination of calcium content(EDTA titrimetric method) ICS 13.060.01
