KS H ISO 8069-2007 Dried milk-Determination of content of lactic acid and lactates《奶粉 乳酸和乳酸盐含量的测定》.pdf

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1、 KS H ISO 8069 KSKSKSKS SKSKSKS KSKSKS SKSKS KSKS SKS KS KS H ISO 8069 :2007 (2012 ) 2007 11 23 http:/www.kats.go.krKS H ISO 8069:2007 : ( ) ( ) () () () ( ) : (http:/www.standard.go.kr) : :2001 12 22 :2007 11 23 :2012 12 28 : 20120814 : ( 02-509-7270) (http:/www.kats.go.kr). 10 5 , . KS H ISO 8069:

2、2007 (2012 ) Dried milk Determination of content of lactic acid and lactates 2005 2 ISO 8069, Dried milkDetermination of content of lactic acid and lactates , . ISO 8069 ISO/TC34 (SC5) . 1 . 2 . 2.1 . 100 g mg . 3 , . a) (NAD, nicotinamide adenine dinucleotide) NAD NADH L- (L- lactic acid dehydrogen

3、ase, L-LDH) D- (D-lactic acid dehydrogenase, D-LDH) b) L- L- L- (glutamate pyruvate transaminase, GPT) NADH 340 nm . 4 , 2 (doubly glass-distilled) , KS H ISO 8069:2007 . 4.1 , cK 4 Fe(CN) 6 3H 2 O=35.9 g/L K 4 Fe(CN) 6 3H 2 O 35.9 g 1 000 mL . 4.2 , c(ZnSO 4 7H 2 O)=71.8 g/L (ZnSO 4 7H 2 O) 71.8 g

4、1 000 mL . 4.3 4.3.1 I, c(NaOH) = 10 mol/L 400 g 1 000 mL . 4.3.2 II, c(NaOH) = 0.1 mol/L 4.0 g 1 000 mL . 4.4 50 % . 4.5 , c(NH 4 ) 2 SO 4 = 3.2 mol/L 422.84 g 1 000 mL . 4.6 , pH 10 (C 4 H 8 N 2 O 3 , glycylglycine) 7.92 g L-(C 5 H 9 NO 4 ) 1.47 g 80 mL 20 10 mol/L I(4.3.1) pH 10.00.1 100 mL . 0 5

5、 3 . 4.7 NAD (C 21 H 27 N 7 O 14 P 2 ) 350 mg 10 mL . 0 5 4 . . 4.8 L-LDH L-LDH (4.4) mL 10 mg pH 7 . L(L-LDH, EC 1.1.1.27) 5 500 units/mL(25 ) . , L-LDH . 0 5 12 . . 2 KS H ISO 8069:2007 4.9 D-LDH Lactobacillus leichmannii D LDH (4.5) mL 5 mg pH 6 . D-(L-LDH, EC 1.1.1.28) 1 500 units/mL(25 ) . 0 5

6、12 . . 4.10 GPT GPT (4.5) mL 20 mg , pH 7 . (GPT, EC 2.6.1.2) 1 600 units/mL(25 ) . , GPT . 1.0 mL (4.5) GPT 10 mg/mL 1 mL . 10 GPT 10 mg/mL 2 mL 4 000 g 1.0 mL . 0 5 12 . . 4.11 L- L-(C 3 H 5 O 3 Li) 50 mg 500 mL . 4.12 D- D-(C 3 H 5 O 3 Li) 50 mg 500 mL . 5 . 5.1 0.1 mg 1 mg . 5.2 50 mL 5.3 50 mL

7、5.4 100 mL 5.5 0.02 mL, 0.05 mL, 0.2 mL, 1 mL 2 mL 3 KS H ISO 8069:2007 5.6 0.1 mL 5 mL 10 mL 5.7 7 cm . 5.8 15 cm . 5.9 5.10 (plastic paddles) . 5.11 (optical path length) 1 cm 340 nm . 5.12 TM1) 6 . KS H ISO 707/IDF 50 . . 7 7.1 . . . , . 7.2 1.0 g 50 mL (5.2) 1 mg . 7.3 7.4 8.2 . 1) TM . ISO IDF

8、.4 KS H ISO 8069:2007 7.4 7.4.1 (5.9) (7.2) 20 mL (4050 ) . 100 mL (5.4) 20 . 7.4.2 (4.1) 5.0 mL , (4.2) 5.0 mL II(4.3.2) 10.0 mL (7.4.1) . 100 mL 30 . 7.4.3 (5.8) . . 8 . 8.1 8.1.1 4.64.10 , 2 , . 8.1.2 L- (4.11) D- (4.12) 10 mL 2 100 mL (5.4) 7.4.2 7.4.3 8.2 L- D- . 8.1.3 W L mg/L . a) L- W L= 341

9、A b) D- W L= 346A A:8.2.1 8.2.2 340 nm 341:L- 9.1 L- ( M r= 96.1) (V 1= 2.24 mL) . 346:D- 9.1 D- ( M r= 96.1) (V 1= 2.27 mL) . 5 KS H ISO 8069:2007 8.1.4 L- D- (8.1.2) L- D- (1005) % . , , . . . 8.2 8.2.1 1 , (5.5) (5.11) 1 cm . 1 D L 1 000 mL (8.1.2) 1 000 mL 1 000 mL (7.4.3) 1 000 mL , pH 10(4.6)

10、1 000 mL 1 000 mL 1 000 mL 1 000 mL NAD (4.7) 0.200 mL 0.200 mL 0.200 mL 0.200 mL GPT (4.10) 0.020 mL 0.020 mL 0.020 mL 0.020 mL (5.10) (5.12) 1 cm 3 4 . 5 340 nm (A b0 A s0 ) . L-LDH (4.8) 0.020 mL 0.020 mL 0.020 mL D-LDH (4.9) 0.050 mL 0.050 mL 0.050 mL 45 , 340 nm (A b45 A s45 ) . 60 , 340 nm (A

11、b60 A s60 ) . L- D- L-LDH(4.8) D-LDH(4.9) . L- 30 45 . 8.2.2 , (9.1) A . A= (A s60 A s0 )4(A s60 A s45 )(A b60 A b0 )4(A b60 A b45 ) , A s60 :8.2.1 60 A s0 :8.2.1 A s45 :8.2.1 45 A b60 :8.2.1 60 A b0 :8.2.1 A b45 :8.2.1 45 . 0(time 6 KS H ISO 8069:2007 zero) , . L (8.2.1 ), 30 45 . , . A= (A s45 A s

12、0 )3(A s45 A s30 )(A b45 A b0 )3(A b45 A b30 ) A s30 :8.2.1 30 A b30 :8.2.1 30 8.2.3 8.2.2 0.500 (7.4.3) (7.3) 8.2.18.2.3 . 9 9.1 w L 100 g mg . 5 s 3 2 5 4 1 r L 10 100 w V V V V V m l k M A w A :8.2.2 340 nm M r : (M r= 90.1) k :340 nm NADH , 6.310 6cm 2 /moL l : (cm)( l =1 cm) M :(7.3) (g) V 1 :

13、(mL)(8.2.1 ) L- D- V 1= 2.29 mL L- V 1= 2.24 mL D- V 1= 2.27 mL V 2 : (7.4.3 ) (mL) (8.2.1 ) V 3 :, (7.4.3 ) (mL)(8.2.3 ) V 4 :7.4.2 (mL)(, V 4=100 mL) V 5 :, (8.2.3 ) (mL) w s : . KS H ISO 1736 . 9.2 . 10 7 KS H ISO 8069:2007 10.1 ISO 5725 2) . (5 ) . 10.2 5 % . a) 100 g 60 mg :10 mg/100 g b) 100 g

14、 60 mg : 15 %() 10.3 , , 5 % . a) 100 g 100 mg :15 mg/100 g b) 100 g 100 mg : 20 % () 11 . a) b) , c) , d) , e) , ( ) 2) ISO 5725:1986, ( ) .8 KS H ISO 8069:2007 A () (GLP) A.1 . . GLP . A.2 A.2.1 ( , , , ) . A.2.2 ( , , ) . A.2.3 . A.2.4 . A.2.5 . A.2.6 / ( 2 8 ) . A.2.7 . A.2.8 , . . A.2.9 . A.3 A

15、.3.1 1 cm . . a) (1) b) . c) , . A.3.2 , ( , ) . (A 1 ) . NADH ( 0.15 mg/mL) (A 2 ) . , A 2 A 1 . (A 2 A 1 ) 9 KS H ISO 8069:2007 5 % , , (3) l . A.3.3 . . A.3.4 . . . A.3.5 ( ). A.3.6 . A.3.7 . . A.3.8 . A.3.9 . , . A.4 A.4.1 ( 10 nm), ( 10 nm) , . NADH NADPH , 340 nm . 365 nm 334 nm . 334 nm, 340

16、nm, 365 nm NADH NADPH . a) 334 nm(Hg) NADH NADPH:6.1810 6cm 2 /mol b) 340 nm(Hg) NADH NADPH:6.310 6cm 2 /mol c) 365 nm(Hg) NADPH:3.510 6cm 2 /mol d) 365 nm(Hg) NADH:3.410 6cm 2 /mol A.4.2 NADH NADPH 2.0 . . a) 2.00 mL A 0 . b) 0.10 mL NADH (0.5 mg/mL) . A 1 . A rn . 5 . 3 1 . 2 ) ( 0 1 r1 A A A 14 .

17、 , A rn . 10 KS H ISO 8069:2007 5 . 3 ) ( 0 n rn V A A A A n : n V: n , NADH . 0.99 . A.5 A.5.1 . A.5.2 . A.5.3 ( , ) . t . 1 , (t1) . 9 . (t11), (t 12), (t13), (t14), (t15) . . A.5.4 . A.5.3 . A.5.5 , (tip) / 3 4 . (tip) . A.5.6 (tip) , , , , . /(1050) L , . A.5.7 . A.6 A.6.1 . . A.6.2 . . (NIST) (

18、BCR) . 11 KS H ISO 8069:2007 A.6.3 . . A.6.4 , . . 12 KS H ISO 8069:2007 13 1 KS H ISO 707, 2 KS H ISO 1736, () 3 ISO 57251:1994, Accuracy (trueness and precision) of measurement methods and resultsPart 1:General principles and definitions 4 ISO 57252:1994, Accuracy (trueness and precision) of measu

19、rement methods and resultsPart 2:Basic method for the determination of repeatability and reproducibility of a standard measurement method 5 LEENHEER J. and JANS J.A. Bulletin of the IDF, No. 207, 1986, pp. 122132 153787 1 145 3(16) (02)26240114 (02)26240148 http:/ KS H ISO 8069 :2007KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Dried milk Determination of content of lactic acid and lactates ICS 67.100.10 Korean Agency for Technology and Standards http:/www.kats.go.kr

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