KS H ISO 3188-2008 Starches and derived products－Determination of nitrogen content by the Kjeldahl method－Titrimetric method《淀粉和淀粉制品 用凯氏法测定氮含量 滴定法》.pdf

1、 KSKSKSKSKSKSKSK KSKSKS KSKSK KSKS KSK KS KS H ISO 3188 KS H ISO 3188:2008 2008 10 14 http:/www.kats.go.krKS H ISO 3188:2008 : ( ) ( ) KT&G ( ) : (http:/www.standard.go.kr) ： ： 2003 11 5 ： 2008 10 14 2008-0659 ： ： ( 025097266) (http:/www.kats.go.kr). 10 5 , . KS H ISO 3188:2008 Starches and derived

2、products Determination of nitrogen content by the Kjeldahl method Titrimetric method 1978 1 ISO 3188, Starches and derived products Determination of nitrogen content by the Kjeldahl method Titrimetric method , . 1 0.01 %(m/m)1) . / . 2 . . ( ) . KS H ISO 1871, KS H ISO 5378, ISO 565, Test sieves Met

3、al cloth, perforated metal plate and electroformed sheet Norminal sizes of openings ISO 1227/Add. 2, Starch, including derivatives and byproducts Vocabulary 3 . 3.1 . , . (nitrite radicals) , 1) 0.025 %(m/m) KS H ISO 5378 .KS H ISO 3188:2008 2 . 4 2) , . 5 , . 5.1 . 201.84 g/mL96 %(m/m) 5.2 30 %(m/m

4、) , 201.33 g/mL . 5.3 20 g/3)5.4 4) . ： 97 g (II), ： 3 g 5.5 0.02 N 0.1 N . 5.6 50 %(V/V) (methyl red) 2 50 %(V/V) (methylene blue) 0.25 g/L 1 . . 6 2)KS H ISO 1871 .3) , .4)KS H ISO 1871 5.2 .KS H ISO 3188:2008 3 . 6.1 500 mL 800 mL . 6.2 (6.1) 6.3 200 mL (splash head) , (6.1) . KS H ISO 1871 . 6.4

5、 0.05 mL 25 mL 0.01 mL 10 mL . 6.5 6.6 ISO 565 0.6 mm . 6.7 7 7.1 5) (spatula) . , . (6.6) . 7.2 (7.1) 10 g ( m) 0.001 g , (6.1) . 5) ( 5 mm) .KS H ISO 3188:2008 4 , , . (7.6) . 7.3 (5.4) 10 g 20 4 m (mL) (5.1) . . ( ) . (6.1 ) (6.2) . . 1 . . 7.4 mL . 50 mL 200 mL ( ) . (6.3) . (25 mL 50 mL ) (5.3)

6、 3 5 (5.6) 500 mL . (6.3 ) (5.2) 150 mL 200 mL . . . . . 200 mL 20 30 . . . . 10 mL 25 mL 0.02 N 0.1 N (5.5) . 7.5 (7.1) 2 . 7.6 KS H ISO 3188:2008 5 . . 7.7 KS H ISO 1871 . 8 . mVVTmVVT)(401.1100)(01014.00101= T ： 2 (5.5) V0： (7.6) (mL) V1： (7.4) (mL) m ： (7.2) (g) 0.1 mL 2 . . 9 . . . 135513 7017 (02)60094114 (02)600948878 http:/ Korean Agency for Technology and Standards http:/www.kats.go.kr KS H ISO 3188:2008KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Starches and derived products Determination of nitrogen content by the Kjeldahl method Titrimetric method ICS 67.180.20