(a)When two or more methods are prescribed in this part of this Schedule determine a component of a fertiliser the choice of the method shall, exceeds where otherwise indicated, be left to the agricultural analyst concerned; the method used must however be indicated in the certificate of analysis.
(b)Any reference to water in this Schedule means purified water as defined in the European Pharmacopoeia.
(a)All reagents used shall be of analytical quality.
(b)For the determination of any form of nitrogen, water must be free of a nitrogenous compounds and carbon dioxide.
(c)Solutions for which no solvents are prescribed must be aqueous.
(d)Only special instruments or apparatus requiring special standards a mentioned in the descriptions of the methods of analysis.
Preparation of the sample for analysis
Determination of ammoniacal nitrogen
Determination of nitrate and ammoniacal nitrogen-Ulsch method
bdetermination of nitrate and ammoniacal nitrogen-Arnd method
cDetermination of nitrate and ammoniacal nitrogen-Devarda method
Determination of nitrogen in calcium cyanamide-in the absence of nitrate
bDetermination of nitrogen in calcium cyanamide-in the presence of nitrate
Determination of total nitrogen in urea
Determination of cyanamide nitrogen
Determination of biuret in urea
Determination of different forms of nitrogen-in the presence of cyanamide nitrogen
bDetermination of different forms of nitrogen-in the absence of cyanamide nitrogen
Extraction of total phosphorus-by mineral acids
bExtraction of phosphorus-by 2% formic acid
cExtraction of phosphorus-by 2% citric acid
dExtraction of phosphorus-by neutral ammonium citrate
eExtraction of phosphorus-by alkaline ammonium citrate (Petermann’s method) at 65°C
fExtraction of phosphorus-by alkaline ammonium citrate (Petermann’s method) at ambient temperature
gExtraction of phosphorus-by alkaline ammonium citrate (Joulie’s method)
hExtraction of phosphorus-by water
Determination of extracted phosphorus
Determination of water-soluble potassium
Determination of water-soluble magnesium-atomic absorption spectro-photometric method
bDetermination of water-soluble magnesium-EDTA method
Determination of total magnesium-atomic absorption spectrophoto-metric method
bDetermination of total magnesium-EDTA method
Determination of chlorides, in the absence of organic matter
Determination of fineness of grinding—dry method
bDetermination of fineness of grinding-for soft natural phosphates
Methods of analysis and test procedures for ammonium nitrate fertiliser containing more than 28% nitrogen by weight
Methods for the application of thermal cycles
Determination of oil retention
Determination of the combustible ingredients
Determination of the pH value
Determination of particle size
Determination of the chloride content (as chloride ion)
Determination of copper