GOST 26811-2014 Confectionery Iodometric method for determination of mass fraction of total sulphurous acid《糖果糕点 测定总亚硫酸质量分数的碘量法》.pdf

1、 , ()INTERSTATE COUNCIL FOR STANDARDIZATION, METROLOGY AND CERTIFICATION(ISC)268112014, - 1.092 . - 1.22009 . , . -, , , 1 - - ( -)2 (-)3 , (- 5 2014 . 46) : ( 3166) 00497 ( 3166) 00497 AMBYKGRUTJUZ 4 18 2015 . 135- 268112014 - 1 2016 .5 2681186 -, - . () . , - - , 2015 -, II 2681120141 .12 13 24 .2

2、5 .26 , , , .27 .38 39 310 5III 268112014 onfectionery. Iodometric method for determination of mass fraction of total sulphurous acid1 , - () , , , , () , - , ( ), - 0,002 % 0,100 %.2 : 12.1.00776 . . 12.1.01893 . - . 12.1.01979* . . - OIML R 76-12011 . . 1. . 177074 ( 104283, 478880) . -, , , . 311

3、877 . . 415979 . . 420477 . . 422075 . . 423274 . . 432877 . . 5725-62003* ( ) . 6. 590482 . , 670972 . 1016376 . . 1202676 . 2436380 . . * 12.1.0192009.* 5725-62002.1 268112014 20160701 2533682 . , 2706886 . ( ) 5-. - 2775288 - , -. 2849890 . . 2922791 ( 835-181) . . 1. 2925191 ( 385-184) . . 1. -

4、, 1 , - . - (), () . , , , , .3 :- (20c177 5) ;- 75 %.4 12.1.007, - 12.1.019, 12.1.018, -, .5 , - , .6 , OIML R 76-1 c1770,5 . 28498 0 C 100 C 0,5 C. - 27752. . I12250,1 29251. 12501 32502 1770. -2538 -3650 25336. 2100 (200; 250; 1000)2 1770. -1100029/32 25336. -1250(500)29/32 25336. -19/9 25336.2 2

5、68112014 -1100 25336. 22512, 25012 29227. . 12026. 4159. ( ) 27068 - () (1/2 Na2S2O3c215 5H2O) = 0,1 /3(0,1). 24363. 4328. 4204. 3118. 10163. 4220, . . . 4232, . . . 6709. , - - , , .7 - .8 5904.9 9.1 (NaOH) = 1 /3 (OH) = 1 /340 56 , , 1000 3. 10 20 30 .9.2 1:3 . , - . . 5 20 6 .9.3 1:5 . - , . . 5

6、20 6 .9.4 (1/6 K2Cr2O7)=0,1/34,9033 - 1000 3. .3 268112014 10 20 30 .9.5 1 % 100 3 1 7080 3 60 . 100 3 -. 10 20 2 .9.6 (1/2 Na2S2O3c215 5H2O) = 0,1 /3 9.6.1 (1/2 Na2S2O3c215 5H2O) = 0,1 /325 , 1000 3, . , - () - (1/2 Na2S2O3c215 5H2O) = 0,1 /3. 10 20 45 . 810 .9.6.2 (1/2 Na2S2O3c215 5H2O) = 0,1 /3 5

7、00 3 2 , 23 3 , 5 3 9.3, 25 3 9.4, , , 2 200250 3 - . - , 3 3 - 9.5 . 0 K0=250V,(1) 25 , , 3;V0 , , 3.9.7 (1/2 I2)=0,1/3 9.7.1 (1/2 I2)=0,1/340,00 5060 3 100 3. 12,70 . 1000 3, . 10 20 30 . 10 . , 25,00 , - . , - () - (1/2 I2) = 0,1 /3.9.7.2 (1/2 I2)=0,1/3 (1/2 I2) = 0,1 /3 (1/2 Na2S2O3c215 5H2O) = 0,1 /3.4 268112014 250 3 25 3 9.7.1, 25 3 9.6 -, 1 3 9.5 .