1、 KSKSKSKSKSKSKSK KSKSKS KSKSK KSKS KSK KS KS H ISO TS 2963 KS H ISO TS 2963: 2007 2007 10 31 http:/www.kats.go.krKS H ISO TS 2963: 2007 : () ( ) F&B () ( ) : (http:/www.standard.go.kr) : :2001 12 22 :2007 10 31 20070962 : : ( 025097266) (http:/www.kats.go.kr). 7 5 , . KS H ISO TS 2963: 2007 i .1 1 1
2、 2 .1 3 1 4 2 4.1 .2 4.2 (CCl3COOH)2 4.3 Ac(NaOH) 5.0 mol/L 2 4.4 Bc(NaOH) 1.0 mol/L 2 4.5 Cc(NaOH) 0.1 mol/L2 4.6 (ZnCl2) 2 4.7 (pH 7.8)2 4.8 2 4.9 / .2 4.10 .3 4.11 3 5 .3 5.1 3 5.2 pH .3 5.3 3 5.4 (macerator) 3 5.5 3 5.6 .3 5.7 .3 5.8 3 5.9 3 5.10 .4 5.11 .4 5.12 (paddles)4 5.13 4 6 .4 7 .4 8 4 8
3、.1 4 8.2 .5 8.3 5 8.4 5 8.5 .5 9 .6 9.1 .6 KS H ISO TS 2963: 2007 ii 9.2 7 10 7 10.1 .7 10.2 .7 10.3 .7 11 .7 A( ) (GLP) 8 12 KS H ISO TS 2963: 2007 Cheese and processed cheese products Determination of citric acid content Enzymatic method 2006 ISO/TS 2963, Cheese and processed cheese productsDeterm
4、ination of citric acid content Enzymatic method , . ISO/TS 2963 ISO/TC 34 (SC 5), (IDF) , . ISO 2963: 1997 . 1 . 2 . 2.1 , . . 3 . a) (Citrate Lyase: CL) b) (NADH) L L , NADH (NAD) (Malate Dehydrogenase: MDH) (Lactate Dehydrogenase: LDH) 340 nm NADH . NADH . KS H ISO TS 2963: 2007 2 4 , . . 4.1 , (8
5、.5.1) . 4.2 (CCl3COOH) (CCl3COOH) 200 g 1 000 mL . 4.3 Ac(NaOH) 5.0 mol/L 200.0 g 1 000 mL . 4.4 Bc(NaOH) 1.0 mol/L 40.0 g 1 000 mL . 4.5 Cc(NaOH) 0.1 mol/L 4.0 g 1 000 mL . 4.6 c(ZnCl2) 800 mg/L 800 mg 1 000 mL . 4.7 (pH 7.8) (H2NCH2CONHCH2CO2H) 71.3 g 700 mL , A(4.3) pH 7.8 (4.6) 100 mL , 1 000 mL
6、 . 0 5 4 . 4.8 (C21H27N7O14P2Na2) 50 mg 100 mg 10 mL . 0 5 4 . 4.9 / (MDH) ; ; pH 60.2 ; EC KS H ISO TS 2963: 2007 3 1.1.1.371) (LDH); ; pH 70.2; EC 1.1.1.27 , 600 units2)/mL MDH 1 400 units2)/mL LDH . 0 5 1 . 4.10 aerobacter aerogenes lyophilisate(CL); EC 4.1.3.6 40 units/mL (CL) .2) 0 5 1 , 20 4 .
7、 4.11 (C6H8O7 H2O) 1.600 g 1 000 mL . 5 . 5.1 0.1 mg . 5.2 pH 5.3 50 mL 5.4 (macerator) . 5.5 100 mL 5.6 40 mL , 25 mL , 5 mL , 2 mL , 1 mL 0.02 mL 5.7 0.1 mL 10 mL 5.8 50 mL 5.9 1) EC 1 .2) ( .) 1 mol . KS H ISO TS 2963: 2007 4 7 cm . 5.10 15 cm . 5.11 (optical path length) 1 cm 2 cm , 340 nm . 5.1
8、2 (paddles) . 5.13 20 25 ( . 8.5.1 ) (5.11) . 20 . 6 . , KS H ISO 7072 . 7 . a) , . . 2 . b) , . . c) ( , , , ) , , . 7.1.2 . . 8 8.1 8.1.1 , 8.1.2 8.1.4 . (4.7 4.10) KS H ISO TS 2963: 2007 5 2 8.1.2 2 100 mL (5.5) 5.0 mL 10.0 mL (4.11) , (4.2) 10 mL 100 mL , 8.4.3 8.5.3 . 8.1.3 9.1 (2) , (4.11) 1 .
9、 V5 mL (4.11) (V5 1 000 mL) V6 mL (8.1.2) (V6 5 mL 10 mL) V7 mL (8.1.2) (V7 100 mL) 8.1.4 1 , 100 %5 % . , , , , . . 8.2 (7. ) 1 g 0.1 mg (5.3) . (5.4) 50 mL (40 50 ) . 100 mL (5.5) , 20 . 8.3 8.4 8.5 , 2 . 8.4 8.4.1 (4.2) 10 mL (8.2) , 100 mL . 8.4.2 30 . 8.4.3 (5.10) . . 8.4.4 (5.3) 25 mL pH B(4.4
10、) pH 4 , C(4.5) pH 8 . 100 mL (5.5) , . 8.4.5 (5.10) . . 8.5 8.5.1 KS H ISO TS 2963: 2007 6 (4.7) 1 . 1 (4.7) 1.00 mL 1.00 mL NADH (4.8) 0.10 mL 0.10 mL MDH/LDH (4.9) 0.02 mL 0.02 mL 2.00 mL 2.00 mL (5.12) , 5 20 (5.13) , 340 nm A0 . : (4.10) 0.02 mL 0.02 mL 10 20 (5.13) . A10 . 8.5.2 (9.1) A . A A0
11、 A10(1) A0 : A10 : , 10 8.5.3 A 0.800 , 8.5.1 8.5.2 (8.2) (8.3) . 9 9.1 (w) . ()%1006427531rrs=VVVVVVVmlKMAAw (2) As : Ar : Mr : ( , Mr 192.1 g/mol ) K : 340 nm NADH ( 6.3106cm2/mol) l : (l 1 cm) m : (8.2) (g) KS H ISO TS 2963: 2007 7 V1 : (V1 3.14 mL) V2 : (8.4.5) (V2 2.00 mL) V3 : pH 8 (8.4.4) (8.
12、4.3) (V3 100 mL) V4 : pH 8 (8.4.4) (8.4.3) (V4 25 mL) V5 : 8.1.2 (V5 100 mL) V6 : (8.5.3) (8.4.5) (mL)(V6 1 ) V7 : (8.5.3 ) (mL)(V7 1 ) 9.2 . 10 10.1 , ISO 57253) . . . 10.2 , 2 5 %( ) . 10.3 , 2 8 %( ) . 11 . a) b) , c) , d) , e) , , 10.1 3) ISO 5725: 1986, ( ) .KS H ISO TS 2963: 2007 8 A ( ) (GLP)
13、 A.1 (good laboratory practice) . . . A.2 A.2.1 ( , , , ) . A.2.2 ( , , ) (coenzyme) . A.2.3 . A.2.4 2 . A.2.5 . A.2.6 / ( 2 8 ). A.2.7 . A.2.8 , . . A.2.9 . A.3 A.3.1 (optical path length) 1 cm . . ( ). . (batch) . A.3.2 ( ) . KS H ISO TS 2963: 2007 9 (A1) . NADH( 0.15 mg/mL) , (A2) . (A2 A1) . . (
14、A2 A1) 0.5 % , , (9.1) (1 cm) . A.3.3 . A.3.4 , . . A.3.5 . A.3.6 , . A.3.7 . A.3.8 . A.3.9 (holder) , , . A.4 A.4.1 10 nm (band width) ., . NADH NADPH , 340 nm , 365 nm 334 nm . 334 nm, 340 nm 365 nm NADH NADPH . 334 nm( ) NADH NADPH: 6.18106cm2/mol 340 nm NADH NADPH: 6.3106cm2/mol 365 nm( ) NADPH:
15、 3.5106cm2/mol 365 nm( ) NADH: 3.4106cm2/mol A.4.2 NADH NADPH 2.0 , . a) 2.00 mL A0 . b) NADH 0.10 mL(0.5 mg/mL) A1 , Arn . KS H ISO TS 2963: 2007 10 Ar1 (A1 A0)2.1/3.5 A1 : NADH b A0 : a c) b) 14 , Arn . Arn (An A0)V/3.5 An : n V : n d) NADH . . A.5 A.5.1 . A.5.2 . A.5.3 ( ) . a) t . b) , 1 (t 1) .
16、 c) b) 9 . d) t 11 , t 12 , t 13 , t 14 t 15 , . e) . A.5.4 , . A.5.3 . A.5.5 / . . A.5.6 , , , . (10 L50 L) / , . A.5.7 . A.6 A.6.1 . . KS H ISO TS 2963: 2007 11 A.6.2 . . ( ) (European Community Bureau of Reference: B.C.R.) . A.6.3 . . A.6.4 , . . KS H ISO TS 2963: 2007 12 1 Enzyme Nomenclature Re
17、commendations of the Nomenclature Committee of the International Union of Biochemistry. Academic Press, New York, 1984 2 KS H ISO 707, 3 KS A ISO 5725 1, ( ) 1: 4 KS A ISO 5725 2, ( ) 2: 135513 7017 (02)60094114 (02)600948878 http:/ KS H ISO TS 2963: 2007 KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Cheese and processed cheese productsDetermination of citric acid contentEnzymatic method ICS 67.100.30 Korean Agency for Technology and Standards http:/www.kats.go.kr