GOST 31716-2012 Dried milk Determination of content of lactic acid and lactates《奶粉 乳酸和乳酸盐含量测定》.pdf

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1、 (ISO 8069:2005, MOD) , ()INTERSTATE COUNCIL FOR STANDARDIZATION, METROLOGY AND CERTIFICATION(ISC)317162012(ISO 8069:2005), - 1.092 . 1.22009 . -, . , , 1 , 42 3 , ( 51 1 2012 .) : ( 3166) 00497 ( 3166) 00497 BYKZKGMDRUTJ -4 29 2012 . 1777- 317162012 - 1 2013 .5 ISO 8069:2005 Dried milk Determinatio

2、n of content of lactic acid and lactates ( . ) , , - . , (-) , , , . - . (MOD). 511962010 ( 8069:2005)6 II 317162012 ( ) - . , - . - , 2013 -, III 3171620121 .12 13 14 15 .26 37 38 .49 610 .6 A () (GLP) - .7 () - .1011IV 317162012 Dried milk. Determination of content of lactic acid and lactates1 D-

3、L- .2 : 5725-12003 ( ) - . 1. 5725-22003 ( ) - . 2. - 2680986 . , - - , 1 , , . (), (-) . , , , , .3 :3.1 L- D- L- D-: , 100 .4 , . , , - , :) L- D- , L- D- - (+) + L- (L-) D- (D-);1 317162012(ISO 8069:2005) 20130701b) L-L-L-c97- -().,L-D-L-D-,-340.5 ., , , -,.5.1 (II),c(K4Fe(CN)6 c215 3H2O) = 35,9

4、/335,9(II).10003 .5.2 ,c(ZnSO4c215 7H2O) = 71,8 /3 71,8 . 1000 3 -.5.3 5.3.1 I ,c(NaOH) = 10 /3400.10003.5.3.2 II ,c(NaOH) = 0,1 /34,0.10003.5.4 (C3H8O3), 50 %5.5 ,c(NH4)2SO4=3,2/3422,84.10003.5.6 , pH 10 7,92 (C4H8N2O3) 1,47 L- (C5H9NO4)803.pH(10,0 c177 0,1)20 CI(.5.3.1)-1003.30 C5 C.5.7 - ()350-(C

5、21H27N7O14P2)103.10 C5 C.-.5.8 L- (L-), 10L-13(5.4).pH- 7. L- 5500 ./3, .L-120 C5 C. L- 8 .5.9 D- (D-) ( Lactobacillus leichmannii)5D-13(.5.5).pH-6.D-1500./325 C.,D-.D-120 C5 C. L- 8 .5.10 - (), 201,03(.5.5).pH- 7. - 1600./325 C.,.2 317162012 1,0 3 (. 5.5) 1 3 20 -. 2,0 3, 10 /3, - 4000 g 10 . 1,0 3

6、 , . D- 12 0C5C. L- 8 .5.11 L- 50 L- (C3H5O3Li) . 500 3 -.5.12 D- 50 D- (C3H5O3Li) . 500 3 -.6 , , .6.1 , 1 , 0,1 .6.2 50 3.6.3 50 3.6.4 10 3.6.5 0,02; 0,05; 0,2; 1,0 2,0 3.6.6 5 10 3, 0,1 3.6.7 7 .6.8 , 15 , .6.9 .6.10 , - - .6.11 10 , c177 1 % 0,000 2,000, 340 .6.12 ( ) 1 ( ), 340 .6.13 -, , .7 7.

7、1 . . , . 26809 - 1. , . , , , . . - . , .7.2 1,0 1 - 50 3.3 3171620127.3 , 7.4 8.2, , .7.4 7.4.1 (. 7.2) (. 6.9) - 20 3, 40 C 50 C. 100 3(. 6.4), . 20 C.7.4.2 (. 7.4.1) 5,0 3 (II) (. 5.1), 5,0 3 (. 5.2) 10,0 3 II (. 5.3.2), . 100 3. 30.7.4.3 (. 6.8), . .8 ! , .8.1 8.1.1 :- ( 5.65.10);- ;- ;- , / .8.1.2 10 3 L- (. 5.11) 100 3(. 6.4). 10 3 D- (. 5.12) - 100 3(. 6.4). L- L- D- D- 100 3, 7.4.2, 7.4.3 8.2.8.1.3 wL;wD,/3,:) L-:wL= 341A; (1)b) D-:wD= 346A, (2) A 340 , 8.2.1 8.2.2;341 , L-