GOST R 54352-2011 Food common salt Determination of a mass fraction of magnesium-ion and calcium-ion by complexonometric method《常见食盐 镁离子和钙离子质量分数的矢量测定方法》.pdf

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2、5 % 0,30 % - 0,01 % 0,70 %.2 : 5725-62002 ( ) . 6. 524822005 . . - 543452011 . 127775 . . 177074 ( 104283, 478880) ., , , . 311877 . . 376079 . . 377372 . . 414574 . . 420477 . . 423377 . . 432877 . . 446177 . . 670972 . 73282001 . 914780 . 1368584 . 1491983 , . - 1830087 . 1848181 . 2533682 . , 284

3、9890 . . 1 543522011 2916991 ( 64877) . 2922791 ( 835-181) . . 1. 2925191 ( 385-184) . . 1. - - - , 1 , , . (), - () . , , - , , .3 (- ) - ( c18710) , c18712 . -.4 4.1 , .4.2 : .(20c177 5) ; 30%80%; - .4.3 - , .4.4 , , - .5 , , , -1 1000-1800 /3 18481. - c177 0,1 200 . - c177 10 1000 . (1100 ) 2 732

4、8. , , 1- , - 0 250 1 28498. . , 50 250 , c177 5. 14919. 1-2-2-5 (10)-0,02 29251. 1-2-1-10-0,05 29251. -75-110 25336. -2-250-34 , -2-1000-42 25336. 1(2)-500 (1000, 2000)-2 1770.2 543522011 3-1-2-1 (2) 29227. 2-2-5 (50) 29169. -1-100 (250, 400, 600, 1000) 25336. 1-10-2, 3-25(50, 100, 250)-2, 1-10(500

5、, 1000)-2 1770. 2-50 25336. 3-20,0 25336. 6 9147. 9147. . . . . . , . ., 3760. , . ., 3773. 6709. , . . ., 4145. , . ., 4461. , . ., 4204. , . ., 3118. , . . ., 4233. , . ., 4328. , . . ., 1277. 18300.,. , -.,. - (), . . . . ().6 6.1 52482.6.2 6.2.1 20 %20,0 , 80 3- . .6.2.2 , 1000 3 30 ( ). , , . 2

6、0 %, 6.2.1.6.2.3 - c187 10,067,0 1000 3, - 200 3 , 6.2.2, 570 3 25 %. - , 6.2.2. 2 .6.2.4 25 % VHCl,3, - 500 3 25 %, 3 543522011VHCl=CCHCl HClc215c215c215c114c11450011,(1) HCl= 25 %- ;c114HCl= 1,124 /3 (20 c177 5) C;500 , 3;1 , %;c1141 (20 c177 5) C,/3. - 600 3, 200 3 . . 500 3, . . (1,124 c177 0,00

7、4) /3. 6 .6.2.5 1/3 VHSO24, 3, 1000 3 1 /3,VHSO24=MCCc215c215c215c215HSO100024221000 100c114,(2) = 49,04 , /;CHSO24=1/3 ;1000 , 3;100 ;1000 3;2 , %;c1142 (20 c177 5) C, /3. - 1000 3, 500 3 . . 1000 3, . 6 .6.2.6 0,100 10,0 . - 6 .6.2.7 0,1 0,05 25,0 . 6.6.2.8 -0,2 - 100 3 20 3 30 3. , , 10 .6.2.9 0,5 %- -0,100 - 100 3, 23- , 6.2.3, 18 3 . , , 10 .6.2.10 -0,100 - 10,0 . 6 .4 5435220116.2.11 0,25 100 3, 20 3-, 30 3 .6.2.12 50 %250,0 , 250 3- . , . 6 .6.2.13 (NaOH) = 2 /3 50 % VNaOH,3, 6.2.12, 1000 3 - 2 /3, VNaOH=MCCc215c215c215c215NaOH1000 100100033c114,(3) = 40,0 / ;NaOH=2/3 ;1000 , 3;1