KS I ISO 14254-2007 Soil quality－Determination of exchangeable acidity in barium chloride extracts《土壤质量 氯化钡萃取液中互换酸性的测定》.pdf

1、 KS I ISO 14254 KSKSKSKS SKSKSKS KSKSKS SKSKS KSKS SKS KS KS I ISO 14254 : 2007 (2012 ) 2007 8 30 http:/www.kats.go.krKS I ISO 14254：2007 : ( ) ( ) ( ) () ( ) , : (http:/www.standard.go.kr) ： ：2002 12 27 ：2007 8 30 ：2012 12 27 ： 20120781 ： (ISO/TC190) ( 02-509-7270) (http:/www.kats.go.kr). 10 5 , .

2、KS I ISO 14254：2007 2001 1 ISO 14254, Soil qualityDetermination of exchangeable acidity in barium chloride extracts , . i KS I ISO 14254 : 2007 (2012 ) Soil quality Determination of exchangeable acidity in barium chloride extracts 1 KS M ISO 11260 . pH ( ). (H ) (Al 3 ) . KS M ISO 11464 . pH . pH 7.

3、8 . pH . 2 . . ( ) . KS M ISO 3696, KS M ISO 11260, KS M ISO 11464, KS M ISO 11465, () 3 KS M ISO 11260 . 0.1 molL 1 0.05 molL 1 NaOH pH7.8 . , . (sodium fluoride) KS I ISO 14254：2007 (BaF 2 NaF ). . . 4 . 4.1 25 0.2 mSm 1 (KS M ISO 3696 2). 4.2 4210()disodium tetraborate decahydrate (borax) Na 2 B

4、4 O 7 10H 2 O(381.5) 99.5 % . 4.3 pH 4.3.1 pH4.00(20 )：(10.210.01) g (potassium hydrogen phthalate), C 8 H 5 KO 4 (4.1) 1 000 mL . 4.3.2 pH7.00(20 )：(3.8000.005) g , KH 2 PO 4 (3.4150.005) g 2 (disodium hydrogen phosphate), Na 2 HPO 4 (4.1) 1 000 mL . 4.3.3 pH9.22(20 )：(3.8000.005) g 4 210 Na 2 B 4

5、O 7 10H 2 O (4.1) 1 000 mL . . 4.4 () 4.4.1 (pH 3.04.4 ) (0.1000.005) g 100 mL . 4.4.2 (pH 4.26.2 ) (0.2000.005) g 100 mL . 2 KS I ISO 14254：2007 4.4.3 (pH 8.210.00 ) (1.000.01) g 100 mL . 4.5 c(HCL)1 molL 1 (d1.19 gmL 1 12 molL 1 ) 83 mL (4.1) 1 000 mL . (borax)(4.2) . 5 H 2 OB 4 O 7 2 2 H + 4 H 3

6、BO 3 1.928 g 100 mL (4.1) ( .) 1 molL 1 10 mL . pH5 . . . 4.6 c (NaOH)(1.0000.025) molL 1 (40.00.5) g (4.1) 1 000 mL . (4.5) (：pH3.5 ). 0.9751.025 molL 1 . . (：pH8.5 ). . 4.7 c (NaOH)(5010 3 1.2510 3 ) molL 1(4.6) 50 mL 1 000 mL (4.1) . CO 2 (soda lime) . . 4.8 c (NaF)1 molL 1 (42.00.2) g (4.1) 900

7、mL . (4.5) pH 7.0 (4.1) 1 000 mL . 3 KS I ISO 14254：2007 4.9 2 BaCl 2 2H 2 O 4.10 1.000 gL 1 ( 99.9 %) (1.0000.001) g (d1.19 gmL 1 ) 20 mL (4.1) 1 000 mL . . 4.11 0.100 gL 1 (4.10) 10 mL 100 mL . 4.12 c (BaCl 2 )0.5 molL 1 (4.9) (12.210.01) g 60 mL (4.1) , 100 mL (4.1) . 4.13 (4.11) 5 mL, 10 mL, 20

8、mL 100 mL 20 mL (4.1) . 20 mL (4.12) (4.1) . (4.11) . 5 5.1 0.05 mL 5.2 pH (4.3) . 5.3 5.4 () (4.3) . pH7.8 . 5.5 4 KS I ISO 14254：2007 / . 396.2 nm . 5.6 . 309.28 nm 396.15 nm (background correction) . 6 6.1 KS M ISO 11260 . 6.2 (blank extract) . 7 7.1 50 mL (6.1) pH (5.2) (5.3) . (4.7) pH 7.8 30 .

9、 (30 ). 50 mL (6.2) . 7.2 () 50 mL (6.1) (4.8) 2.5 mL . (4.7) pH 7.8 . , (30 ). (6.2) . KS M ISO 11260 100 mL. , 7.1 7.2 . 7.3 () (4.13) . (6.1) KS M ISO 11260 . (calibration blank) (extraction blank) (signal) . 5 KS I ISO 14254：2007 6 1 , / . 2 ICP , (4.13) (6.1 6.2) (4.1) . 8 (1) . 100 100 100 ) (

10、 s NaOH b a A w m V V c V V E (1) E A ： cmol kg 1 (10 2 mol kg 1 ) V a ： (mL) V b ： (mL) c NaOH ： (molL 1 ) V s ： (mL) m ：KS M ISO 11260 (g) V ：KS M ISO 11260 (mL) w ：KS M ISO 11465 ()(%) (1) , a b 7.2 . (2) . 100 100 90 AI AI w m V E (2) E AI ： (cmolkg 1 ) AI ： (mgL 1 ) m ：KS M ISO 11260 (g) V ：KS

11、M ISO 11260 (mL) w ：KS M ISO 11465 ()(%) 9 . a) b) c) cmolkg 1 . d) pH . e) 153787 1 145 3(16) (02)26240114 (02)26240148 http:/ KS I ISO 14254 ：2007KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Soil quality Determination of exchangeable acidity in barium chloride extracts ICS 13.080.10 Korean Agency for Technology and Standards http:/www.kats.go.kr