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4、 . . -. , , , - . , , . , , -, , . , - . , - , . , , / 16634-2:2009 , - .IV 543902011/ISO/TS 16634-2:2009 2, Food products. Determination of the total nitrogen content by combustion according to the Dumas principle andcalculation of the crude protein content. Part 2. Cereals, pulses and milled cere
5、al products 201307011 - , . , (. 1 6), - . - (. D).2 . - . - ( ). 712 . . - 6540 . ( ) 24557 . . 3 .3.1 (nitrogen content): , -, . .3.2 (crude protein content): (3.1), -, 5,7 , , 6,25 , - . , () . , , , , , .1 543902011/ISO/TS 16634-2:20094 . . - , -. .5 , - . (. 5.12), .5.1 ()-(): 5.1.1 5.1.2.5.1.1
6、 , CO2 99,99 % .5.1.2 , 99,99 % .5.2 , O2 99,99 % .5.3 , (PbCrO4) .5.4 / . 5 % Pt (Al2O3) CuO 1:7 1:8 . , , .5.5 . .5.6 () - .5.7 (, , ) . (1%).5.8 (P2O5) Mg(ClO4)2, .5.9 .5.10 (CuO) .5.11 (NaOH) .5.12 (C4H7NO4) (C10H16N2O8), (C5H9NO4), (C9H9NO3) , . 99 % .5.13 30 C 60 C , .6 , , :6.1 , 0,0001 .6.2
7、6.3 800 1 , , .2 543902011/ISO/TS 16634-2:20096.4 (, , , ) -, , . 1 , . 2 (, ) .6.5 *, , , 850 C, -. , - A, . B.1, B.2 B.3. . , - (-, ), .7 . - . , . ISO 24333 7 .8 , - . (6.2), . - (6.3) 800 - ( 300 ) 1 (300 ). , , , 1, . 1 , , % 710500200100 95 100 85 , , . 712 , , 6540 24557 . - 2 + 1 . 2 % .* Elementar Analysensysteme, Sumika Chemical Analysis Service LECO Instruments . , . .3 543902011/ISO/TS 16634-2:20099 9.1
