1、 543532011 - 27 2002 . 184- , 1.02004 . 1 - ( )2 154 -3 12 2011 . 179-4 , - . () . - , , 2012 , - - II 5435320111 .12 13 .24 .25 , , , 26 37 .48 49 510 5III 543532011 - Foodcommonsalt.Determinationofsulphate-ionmassfractionbygravimetricmethod 201207011 -0,10%1,60%.2 : 5725-62002 ( ) .6.524822005 .-5
2、43452011 .45077 .127775 . 177074 ( 104283, 478880) .,.311877 .395676 .410872 .2-.422375 .446177 .670972 .73282001 .813685 .914780 . 973691 -.1368584 .1491983 ,.-1848181 .2533682 .,2849890 .1 543532011 2916991 . 2922791 ( 835-181) . . 1. - , 1 , - , . - (), () . , , , , .3 - .4 4.1 , .4.2 : (20c177 5
3、) ; .30%80%; - .4.3 , - .4.4 , , .5 , , , -1 700 1840 /3 18481. - c177 0,1 200 . - c177 10 1000 . (1100 ) 2 7328. , , 1- , - 0 250 1 28498. . , 50 250 , c177 5. -8 , 900 , 9736. 14919. 1-100(500, 1000)-2 1770. 3-2-2-5 29227. 2-2-5(100) 29169. -1-150(400, 1000) 25336. 1-10(25, 100, 250, 500)-2 1770.
4、1(2)-190 25336. -75-110 25336. .2 543532011 . . . 3 9147. 2-, . . . 4108. 6709. , . . . 4223. 450. 3956. 8136. 4461. , . . . 3118. , . . . 1277. .6 6.1 52482.6.2 (750 c177 50)30 2 , . , , , . . - 0,0005 .6.3 6.3.1 10 %10,0 150 3, 90 3 , - . 1820 , (70 C 90 ) . 3 .6.3.2 10 % V,3, 1000 3, V=CCc215c215
5、c162c215 c162c114c11420201000,(1) = 10 % ;c11420= 1,047 /3 ;1000 , 3; c162 , %;c162c11420 , /3. , , , (950 V)3 . - , 1000 3- . . (1,047 c177 0,002) /3. 6 .6.3.3 - 10 /318,140 , 100105,10003,- , . .3 5435320116.3.4 0,5 %0,500 100 3, - 20 3 , 10 3 -. . . .6.4 10,000 ( 50,000 ) 400 3. 150 200 3 ( 70 90
6、 ) . - 30. (20 c177 5) 500 3 . (70 90 ) - ( - 0,5 %, 6.3.4). . - , - 54345.7 100 3, 6.4, 150 3, 3 3 10 %, 6.3.2, . ( ) 5 3 10 %, 6.3.1. 4 40 . (7090). , 6.2. 100 105 30, (750 c177 50) 2 . , , - , . . 0,0005 . .8 - XSO4,%,XSO4=04116 500 10021,( )mmmVc45c215c215,(2) 0,4116 -;m2 , ;m1 , ;500 , 3;100 ;m , , m =c162 c45mX()1001001,(3) m c162 , ;X1 , %, 13685 ( 2.2.4);100 ;V , 3. .4 543532011 - - , (), : r (. 10).9 - XSO4c177c68, = 0,95, (4)XSO4 ,%;c68 , 1, %.10 1. 1 - - XSO4 ( = 0,95)r
