1、 KSKSKSKSKSKSKSK KSKSKS KSKSK KSKS KSK KS KS I ISO 11261 ( ) KS I ISO 11261:2008 2008 11 10 http:/www.kats.go.krKS I ISO 11261:2008 : ( ) ( ) ( ) : (http:/www.standard.go.kr) ： ：1998 4 30 ：2008 11 10 2008-0751 ： ： ( 02-509-7266) (http:/www.kats.go.kr). 10 5 , . KS I ISO 11261:2008 ( ) Soil quality D
2、etermination of total nitrogen Modified Kjeldahl method 1995 1 ISO 11261, Soil quality Determination of total nitrogen Modified Kjeldahl method , . 1 ( , , , ) . , ( ) . . 2 . . ( ) . KS A ISO 5725( ), ( ) KS M ISO 3696, KS M ISO 11464, KS M ISO 11465, ( ) 3 (Se) (TiO2) . 1 (Se) . 4 . KS M ISO 3696
3、2 . 4.1 / 25 g ( 1.84 g/cm3) 1 L . KS I ISO 11261:2008 2 4.2 200 g, (II) (5 ) 6 g (anatase) 6 g . 4.3 (5 ) 0.25 mm . 4.4 c(NaOH) 10 mol/L 4.5 (H3BO3) 20 g/L 4.6 0.1 g 0.02 g 100 mL . 4.7 c(H) 0.01 mol/L 5 . 5.1 50 mL . 5.2 2 . 5.3 (Parnas-Wagner) . 5.4 0.01 mL . 6 KS M ISO 11464 . 3 . KS I ISO 11261
4、:2008 3 (105 ) . 7 0.2 g1 g( 0.5 %0.1 %) (5.1) . / (4.1) 4 mL . . (4.3) 0.5 g , (5.2) . (4.2) 1.1 g . 1/3 5 . 400 . 4 2 . 20 mL . (5.3) . 3 . (4.5) 5 mL (100 mL) . (4.4) 20 mL . 40 mL ( ). (4.6) (4.7) . 5 . pH 5.0 . 6 25 mL/min . 100 mL . . . 8 (wN), mg/g . ()( )100100HOHN01N2wmMcVVw+=+ V1 ： (4.7) (
5、4.6)(mL) V0 ： (4.7) (4.6)(mL) c(H) ： (4.7) H (mol/L) 0.01 mol/L c(H) 0.02 mol/L MN ： (g/moL)( 14) m ： (g) wH2O： KS M ISO 11465 , ( % ) . KS I ISO 11261:2008 4 9 1992 14 KS A ISO 5725 4 1 . 1 2 2 mg/g 15 % , 2 mg/g 10 % . 1 (outlier) , sr, r, sR, R mg/g mg/g wN mg/g srr sRR 1 0.98 0.06 0.17 0.27 0.76
6、 2 3.11 0.12 0.33 0.58 1.62 3 6.70 0.19 0.54 1.07 3.00 4 10.88 0.26 0.74 0.89 2.50 sr： sR： r： R： 10 . a) b) c) d) KS I ISO 11261:2008 5 A ( ) 1 THUN, HERRMANN and KNICKMANN, Die Untersuchung von Bden(1955), Neumann Verlag, Radebeul and Berlin 2 PAGE, A. L. et al., Methods of soil analysis, Part 2(19
7、82). American Society of Agronomy and Soil Science of America, Madison, WI 3 WILLIAMS, P.C. J.Sci. Fd. Agric. 24(1973), p.343 ( ) 135513 7017 (02)60094114 (02)600948878 http:/ Korean Agency for Technology and Standards http:/www.kats.go.kr KS I ISO 11261:2008 KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Soil qualityDetermination of total nitrogenModified Kjeldahl method ICS 13.080
