1、 KSKSKSKS KSKSKSK KSKSKS KSKSK KSKS KSK KS KS I ISO 14235 (sulfochromic oxidation) KS I ISO 14235 :2009 2009 12 18 http:/www.kats.go.krKS I ISO 14235:2009 : ( ) ( ) ( ) : (ISO/TC190) () ( ) ( ) : (http:/www.standard.go.kr) ： ：1999 12 28 ：2009 12 18 2009-0830 ： ：(ISO/TC190) ( 02-509-7266) (http:/www.
2、kats.go.kr). 10 5 , . KS I ISO 14235:2009 (sulfochromic oxidation) Soil qualityDetermination of organic carbon by sulfochromic oxidation 1998 1 ISO 14235, Soil qualityDetermination of organic carbon by sulfochromic oxidation , . 1 . (air-dry soil) . Cl Fe 2 . 2 mg . 2 . . ( ) . KS I ISO 10694, ( ) K
3、S I ISO 11464, KS I ISO 11465, () KS M ISO 3696, 3 135 . (orange-red) Cr 3 . . 4 , Cr 3 . . KS I ISO 14235:2009 2 2 mg 0.7 mg . 4 . 4.1 , 25 0.2 mS/m (KS M ISO 3696 2 ) 4.2 (H 2 SO 4 ), ( 1.84 g/cm 3 ) 4.3 , c (K 2 Cr 2 O 7 )0.27 mol/L (K 2 Cr 2 O 7 ) 80 g 1 000 mL 800 mL (4.1) . . . . . 4.4 (C 6 H
4、12 O 6 ) 5 5.1 5.2 , 0.1 mg . 5.3 , (5.4) (75.00.2) mL 5.4 (heating block), (1352) . h(mm) (5.3) ( h10) mm 150 mm . . (4.2) 15 mL . 5.5 5.6 5.7 5.8 , 10 mm 585 nm . 5.9 KS I ISO 14235:2009 3 6 KS I ISO 11464 2 mm . KS I ISO 11465 . KS I ISO 11464 250 m . 7 7.1 . 20 mg . 1 . 1 g/kg 040 4080 80160 160
5、400 400 mg 400500 200250 100125 4550 2025 7.2 (5.3) . (5.7) (4.3) 5.0 mL , (4.2) 7.5 mL . 135 (5.4) . 30 (5.9) . (4.1) 50 mL . 100 mL . 1 . 2 000 g 10 (5.5). (5.6) . . , . . 7.3 2 100 mL (volumetric tubes) (4.3) 5.00 mL . 7.2 7.5 mL . . . KS I ISO 14235:2009 4 2 g 5 mL mg 1 0.00 0 2 0.25 5 3 0.50 10
6、 4 0.75 15 5 1.00 20 7.4 585 nm (5.8) , . . . 8 . 100 100 oc w m a w w oc ： (g/kg) a ： (mg) m ： (g) w ：KS I ISO 11465 (%) KS I ISO 10694 95 % . . w om fw oc w om ： (g/kg) w oc ： (g/kg) f ： , 1.7 2.5 . 9 2 3 . KS I ISO 14235:2009 5 3 (g/kg) 0 10 1 g/kg 10 6.5 % 10 . a) b) c) d) (g/kg) e) f) (sulfochromic oxidation) 153787 1 92 3(13) (02)26240114 (02)262401489 http:/ KS I ISO 14235 :2009 KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Soil quality Determination of organic carbon by sulfochromic oxidation ICS 13.080 Korean Agency for Technology and Standards http:/www.kats.go.kr
