GOST EN 15476-2013 Fertilizers Determination of nitric and ammoniacal nitrogen according to Devarda《肥料 根据Devarda的氮和氨态氮的测定》.pdf

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1、 , () INTERSTATE COUNCIL ON STANDARDIZATION, METROLOGY AND CERTIFICATION (ISC) EN 15476 2013 (EN 15476:2009, IDT) EN 154762013 II , 1.092 . 1.297 . , . , , , 1 84 ( ) 2 , 3 , ( 5 2013 . 61-) : ( 3166) 00497 ( 3166) 00497 AZ KZ KG D RU TJ UZ - 4 EN 15476:2009 Fertilizers Determination of nitric and a

2、mmoniacal nitrogen according to Devarda. (. ). CEN/TC 260 . (en). . , , , , . (IDT). 5 22 2013 . 1845- EN 154762013 c 1 2015 . 6 EN 154762013 III , . () . , , 2014 -, - EN 154762013 1 Fertilizers. Determination of nitric and ammoniacal nitrogen according to Devarda 20150101 1 , ( a, b c). , , . 2 .

3、, ( ). EN 1482-2 Fertilizers and liming materials Sampling and sample preparation Part 2: Sample preparation ( . . 2. ) EN 12944-1:1999 Fertilizers and liming materials and soil improvers Vocabulary. Part 1: General terms (, . . 1. ) EN 12944-2:1999 Fertilizers and liming materials and soil inprover

4、s Vocabulary Part 2: Terms relating to fertilizers (, . . 2., ) EN ISO 3696:1995 Water for analytical laboratory use Specification and test methods ( . (ISO 3696:1987) 3 EN 12944-1:1999 EN 12944-2:1999. 4 , 45 % Al, 5 % Zn 50 % Cu ( ). ; . 5 5.1 ( .) (3- EN ISO 3696:1995). 5.2 ; p(HCL) = 1,18 / . 5.

5、3 ( ), = 0,05 /. 5.4 ( a), , = 0,1 / . 5.5 ( b, . 2 8.4), = 0,1 / . EN 154762013 2 5.6 ( b, . 2 8.4), , = 0,2 / . 5.7 ( c, . 2 8.4), = 0,25 / . 5.8 ( c, . 2 8.4), , = 0,5 / . 5.9 , 90 % 100 % 0,25 2, 50 % 75 % 0,075 2. , 100 . 5.10 , 30 % (NaOH) = 1,33 / , . 5.11 5.11.1 A: 1 37 = 0,1 / 1 . B: 1 1 .

6、A B. , . 0,5 (10 ) . 5.11.2 0,1 50 95 % . 100 , . - . . 5.12 , 95 % 96 %. 5.13 , . 6 6.1 , , , . , , 1. , . EN 154762013 31 750 1000 ; 2 , 18 ; 3 18 ( ); 4 ( ) , , ; 5 750 ; 6 1 6.2 10, 20, 25, 50, 100 200 . 6.3 500 . 6.4 35 40 . EN 154762013 4 7 , . EN 1482-1. EN 1482-2. 8 8.1 1,2 3, , 0,001, 5, 7

7、10 250 . 50 20 (5.2). , . , 500 , . 8.2 , , , 1, 2 3. , 1. (5.11.1 5.11.2) , , , 50 . . . , , 1. . 250 300 , 5 (5.12) 4 (5.9), (. ). , 30 30 % - (5.10), , , , (5.2), , . , . , . , , . , , 200 30 ( 45 ). , ; , , (. 2 8.4). , , , , 0,700 (NaHPO4. 22), Ca(OH)2. 8.3 ( ) . 8.4 , , (5.13), 0,050 0,150 . :

8、 1 , ( 20 HCI (5.2) ), , , : , , 250 , (5.11.1, 5.11.2) . 0,2 / (5.6), (5.2). , 8.2. EN 154762013 52 , , , , 40 45 . 1 , , a N, % , , , , , N = (50-A)Fa 0 5 10 500 50 (50 - A) 0,14 5 10 10 500 25 (50 - A) 0,28 10 15 7 500 25 (50 - A) 0,40 15 20 5 500 25 (50 - A) 0,56 20 40 7 500 10 (50 - A) 1,00 , :

9、 50 . c=0,05 / , : 50 . NaOH KOH c=0,1 / . aN = (50-A)F, : N , %; 50 , , ;A , , ;F , , , , , 2 , , b N, % , , , , , N = (50-A)Fa 0 5 10 500 100 (50 - A) 0,14 5 10 10 500 50 (50 - A) 0,28 10 15 7 500 50 (50 - A) 0,40 15 20 5 500 50 (50 - A) 0,56 20 40 7 500 20 (50 - A) 1,00 , : 100 . c=0,1 / , : 50 . NaOH KOH c=0,2