# Fertilisers (Sampling and Analysis) Regulations (Northern Ireland) 1996, Paragraph 5: Methods of Analysis


1. Preparation of the sample for analysis
2. Determination of ammoniacal nitrogen
3. a Determination of nitrate and ammoniacal nitrogen — Ulsch method
b Determination of nitrate and ammoniacal nitrogen — Arnd method
c Determination of nitrate and ammoniacal nitrogen — Devarda method
4. a Determination of the total nitrogen in calcium cyanamide — in the absence of nitrate
b Determination of the total nitrogen in calcium cyanamide — in the presence of nitrate
5. Determination of total nitrogen in urea
6. Determination of cyanamide nitrogen
7. Determination of biuret in urea
8. a Determination of different forms of nitrogen in the same sample — in the presence of cyanamide nitrogen
b Determination of different forms of nitrogen in the same sample — in the absence of cyanamide nitrogen
9. a Extraction of total phosphorus — by mineral acids
b Extraction of phosphorus — by 2% formic acid
c Extraction of phosphorus — by 2% citric acid
d Extraction of phosphorus — by neutral ammonium citrate
e Extraction of phosphorus — by alkaline ammonium citrate (Petermann’s method) at 65°C
f Extraction of phosphorus — by alkaline ammonium citrate (Petermann’s method) at ambient temperature
g Extraction of phosphorus — by alkaline ammonium citrate (Joulie’s method)
h Extraction of phosphorus — by water
10. Determination of extracted phosphorus
11. Determination of water-soluble potassium
12. Determination of chlorides in the absence of organic matter
13. a Determination of fineness of grinding — dry method
13. b Determination of fineness of grinding of soft natural phosphates
14. Methods of analysis and test procedures for ammonium nitrate fertiliser containing more than 28% nitrogen by weight
a Method for the application of thermal cycles
b Determination of the oil retention value
c Determination of combustible ingredients
d Determination of the pH value
e Determination of the particle size
f Determination of the chlorine content (as chloride ion)
g Determination of copper
15. Extraction of total calcium, total magnesium, total sodium and total sulfur in the form of sulfates
16. Extraction of total sulfur
17. Extraction of water-soluble calcium, magnesium, sodium and sulfur (in the form of sulfates)
18. Extraction of water-soluble sulfur
19. Extraction and determination of elemental sulfur
20. Manganimetric determination of extracted calcium following precipitation in the form of oxalate
21. Determination of magnesium by atomic absorption spectrometry
22. Determination of magnesium by complexometry
23. Determination of sulfates
24. Determination of the sodium extracted
25. Trace elements at a concentration less than 10%
a Extraction of total trace elements
b Extraction of water-soluble trace elements
c Removal of organic compounds from fertiliser extracts
d Determination of trace elements in fertiliser extracts by atomic absorption spectrometry (general procedure)
e Determination of boron in fertiliser extracts by means of spectrometry with azomethine-h
f Determination of cobalt in fertiliser extracts by atomic absorption spectrometry
g Determination of copper in fertiliser extracts by atomic absorption spectrometry
h Determination of iron in fertiliser extracts by atomic absorption spectrometry
i Determination of manganese in fertiliser extracts by atomic absorption spectrometry
j Determination of molybdenum in fertiliser extracts by spectrometry of a complex with ammonium thiocyanate
k Determination of zinc in fertiliser extracts by atomic absorption spectrometry
26. Trace elements at a concentration greater than 10%
a Extraction of total trace elements
b Extraction of water-soluble trace elements
c Removal of organic compounds from fertiliser extracts
d Determination of trace elements in fertiliser extracts by atomic absorption spectrometry (general procedure)
e Determination of boron in fertiliser extracts by means of acidimetric titration
f Determination of cobalt in fertiliser extracts by the gravimetric method with 1-nitroso-2-naphthol
g Determination of copper in fertiliser extracts by the titrimetric method
h Determination of iron in fertiliser extracts by atomic absorption spectrometry
i Determination of manganese in fertiliser extracts by titration
j Determination of molybdenum in fertiliser extracts by the gravimetric method with 8-hydroxyquinoline
k Determination of zinc in fertiliser extracts by atomic absorption spectrometry

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Source: https://www.legislation.gov.uk/nisr/1996/513/schedule/2/part/I/paragraph/5 (the official version)
Page: https://openlegislation.uk/fertilisers-sampling-and-analysis-regulations-northern-ireland-1996/schedule-2/part-I/paragraph-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.