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2.Prescribed amount for the purposes of the definition of sampled portion
3.Manner of taking, marking, sealing and fastening up of samples
5.Qualifications of agricultural analysts and deputy agricultural analysts
MANNER OF TAKING, MARKING, SEALING AND FASTENING UP OF SAMPLES
PART II GENERAL INSTRUCTIONS FOR THE TAKING OF SAMPLES
1.In the case of fertiliser in containers, only unopened containers...
4.When stones are naturally present in a fertiliser, they shall,...
5.An inspector who intends to take a sample in accordance...
6.The sampling apparatus shall be made of materials which cannot...
8.Notwithstanding the provisions of these Regulations, a sampling spear shall...
9.Mechanical apparatus may be used for the sampling of moving...
10.Apparatus designed to divide the sample into approximately equal parts...
11.A sample taken in accordance with the methods described below...
PART V MARKING, SEALING AND FASTENING UP OF THE FINAL SAMPLE
1. PREPARATION OF THE SAMPLE FOR ANALYSIS
2.1.Solid fertilisers: the preparation of a final sample received at...
2.2.Fluid fertilisers: the final sample is mixed by shaking to...
4.2.Finals samples which must be divided and part of which must be ground
4.3.Final samples in respect of which all determinations are carried out on a grounded product
2. DETERMINATION OF AMMONIACAL NITROGEN
4.1.Hydrochloric acid solution, 50% (V/V): dilute an appropriate volume of...
4.8.Sodium hydroxide solution, 30 g per 100 ml, ammonia free...
4.9.Indicator solutions: Mixed indicator: (4.9.1) Solution A: dissolve 1 g...
5.1.Distillation apparatus consisting of a round-bottomed flask of suitable capacity...
3a. DETERMINATION OF NITRIC AND AMMONIACAL NITROGEN — ULSCH METHOD
3b. DETERMINATION OF NITRIC AND AMMONIACAL NITROGEN — ARND METHOD
3c. DETERMINATION OF NITRIC AND AMMONIACAL NITROGEN — DEVARDA METHOD
4a. DETERMINATION OF TOTAL NITROGEN IN CALCIUM CYANAMIDE — IN THE ABSENCE OF NITRATE
4b. DETERMINATION OF TOTAL NITROGEN IN CALCIUM CYANAMIDE — IN THE PRESENCE OF NITRATE
6. DETERMINATION OF CYANAMIDE NITROGEN
4.2.Iron powder, reduced with hydrogen (the prescribed quantity of iron...
4.7.Sulfuric acid solution: dilute an appropriate volume of sulfuric acid...
4.9.Sodium hydroxide solution, 30 g per 100 ml, ammonia free....
4.10.Sodium or potassium hydroxide, 0.2 M solution, free from carbonates....
4.11.Stannous chloride solution: Dissolve 120 g of stannous chloride (SnCl2.2H2O)...
4.13.Hydrochloric acid solution: dilute an appropriate volume of hydrochloric acid...
4.20.Sodium or potassium hydroxide, 0.1 M solution, free from carbonate....
4.25.Urease solution: Suspend 0.5 g of active urease in 100...
4.27.Copper oxide (CuO): 0.3 to 0.4 g per determination or...
4.28.Anti-bump granules washed in hydrochloric acid and ignited.
4.29.Indicator solutions: (4.29.1) Mixed indicator solution: Solution A: dissolve 1...
4.30.Indicator papers: Litmus, bromothymol blue (or other papers sensitive in...
5.2.Apparatus for the determination of ammoniacal nitrogen 7.2.5.3. An example...
5.3.Apparatus for the estimation of urea nitrogen (7.2.6.1). It consists...
5.7.Sintered glass crucibles, diameter of pores 5 to 15 microns....
8.1.In certain cases, a difference may be found between the...
8.2.Before each analysis, check that the apparatus is working properly...
3.2.Total soluble nitrogen except nitric nitrogen, by Kjeldahl digestion after...
3.3.Nitric nitrogen, by difference: between 3.1.2 and 3.2 and/or between...
3.4.Ammoniacal nitrogen, by cold distillation of a weak alkaline solution;...
3.5.Ureic nitrogen, either: (3.5.1) By conversion using urease, into ammonia,...
4.2.Iron powder, reduced with hydrogen (the prescribed quantity of iron...
4.7.Sodium hydroxide solution 30 g per 100 ml, ammonia free....
4.8.Sodium or potassium hydroxide, 0.2 M solution, free of carbonates....
4.10.Hydrochloric acid solution: dilute an appropriate volume of hydrochloric acid...
4.22.Urease solution: suspend 0.5 g active urease in 100 ml...
4.24.Catalyst: copper oxide (CuO), 0.3 to 0.4 g per determination,...
4.25.Anti-bump granules of pumice stone washed with hydrochloric acid and...
4.26.Indicator solutions: (4.26.1) Mixed indicator: Solution A: dissolve 1 g...
4.27.Indicator papers: litmus, bromothymol blue (or other papers sensitive in...
5.2.Apparatus for determination of ammoniacal nitrogen. An example of the...
5.3.Apparatus for determination of ureic nitrogen by the urease method...
5.6.Sintered glass crucibles, diameter of pores 5 to 15 microns....
8.1.Before each analysis, check the functioning of the apparatus and...
9e. EXTRACTION OF PHOSPHORUS BY ALKALINE AMMONIUM CITRATE (PETERMANN'S METHOD) AT 65°C
9g. EXTRACTION OF PHOSPHORUS BY ALKALINE AMMONIUM CITRATE (JOULIE'S METHOD)
10. DETERMINATION OF EXTRACTED PHOSPHORUS (Gravimetric method using quinoline phosphomolybdate)
11. DETERMINATION OF WATER-SOLUBLE POTASSIUM
4.1.Formaldehyde, 25 – 35% solution, filter if necessary before use....
4.3.Sodium hydroxide, 10 M solution. Care should be taken to...
4.4.Indicator solution: dissolve 0.5 g phenolphthalein in 100 ml 90%...
4.5.EDTA solution: 4 g of the dihydrated disodium salt of...
4.6.STPB solution: dissolve 32.5 g sodium tetraphenylborate in 480 ml...
12. DETERMINATION OF CHLORIDES IN THE ABSENCE OF ORGANIC MATERIAL
13b. DETERMINATION OF FINENESS OF GRINDING OF SOFT NATURAL PHOSPHATES
14b. DETERMINATION OF THE OIL RETENTION VALUE
5.3.Funnel, plastic, preferably with a cylindrical wall at the upper...
5.4.Test sieve, aperture 0.5 mm, fitting into the funnel (5.3)....
5.5.Filter paper, rapid filtering grade, creped, soft, weight 150 g/m2....
6.1.Carry out two individual determinations in quick succession on separate...
6.2.Remove particles smaller than 0.5 mm using the test sieve...
6.3.Filter the entire contents of the beaker through the funnel...
14c. DETERMINATION OF COMBUSTIBLE INGREDIENTS
3.4.Barium hydroxide: weigh out 15 grams of barium hydroxide (Ba(OH)2.8H2O),...
3.7.Bromophenol blue: solution of 0.4 grams per litre in water....
3.8.Phenolphthalein: solution of 2 grams per litre in 60% by...
3.10.Demineralised water, freshly boiled to remove carbon dioxide.
4.3.Apparatus made up of the following parts and assembled, if...
5.4.Measurement of the carbonates originating from organic material
14e. DETERMINATION OF THE PARTICLE SIZE
3.1.200 mm diameter woven-wire test sieves to BS 410 (1986)...
3.3.Mechanical sieve shaker (if available) capable of imparting both vertical...
4.1.The sample is divided representatively into portions of approximately 100...
4.3.Arrange the nest of sieves in ascending order (receiver, 0.5...
4.4.Shake by hand or machine, imparting both a vertical and...
4.6.Weigh the material retained on each sieve and that collected...
5.1.Convert the fraction masses to a percentage of the total...
5.2.At least two separate analyses should be carried out and...
14f. DETERMINATION OF THE CHLORINE CONTENT (AS CHLORIDE ION)
3.3.Silver nitrate 0.1 M standard solution. Store this solution in...
3.4.Silver nitrate 0.004 M standard solution — prepare this solution...
3.5.Potassium chloride 0.1 M standard reference solution. Weigh, to the...
3.6.Potassium chloride 0.004 M standard reference solution — prepare this...
4.1.Potentiometer with silver indicating electrode and calomel reference electrode, sensitivity...
4.2.Bridge, containing a saturated potassium nitrate solution, connected to the...
4.4.Microburette with fine-pointed tip, graduated in 0.01 ml divisions.
5.4.Determination Take a portion of sample in the range of...
17. EXTRACTION OF WATER-SOLUBLE CALCIUM, MAGNESIUM, SODIUM AND SULFUR (IN THE FORM OF SULFATES)
20. MANGANIMETRIC DETERMINATION OF EXTRACTED CALCIUM FOLLOWING PRECIPITATION IN THE FORM OF OXALATE
4.1.Diluted hydrochloric acid: One volume of hydrochloric acid (ρ =...
4.2.1:10 dilute sulfuric acid: One volume of sulfuric acid (ρ...
4.3.1:1 dilute ammonia solution: One volume of ammonia (ρ =...
4.4.Saturated solution of ammonium oxalate [(NH4)2C2O4.H2O] at ambient temperature (approximately...
4.7.Solution of bromothymol blue in 95% ethanol, 0.1% (m/v).
4.8.Solution of bromocresol green in 95% ethanol, 0.04% (m/v).
21. DETERMINATION OF MAGNESIUM BY ATOMIC ABSORPTION SPECTROMETRY
4.4.Strontium chloride solution. Dissolve 75 g of strontium chloride (SrCl2.6H2O)...
5.1.Spectrometer fitted for atomic absorption, with a magnesium lamp, set...
7.1.If the fertiliser has a declared magnesium (Mg) content of...
7.2.Using a pipette, take 10 ml of the extraction solution...
7.3.Dilute this solution (7.2) with the 0.5 M hydrochloric acid...
7.4.Preparation of blank solution. Prepare a blank solution by repeating...
7.5.Preparation of calibration solutions. By diluting the standard solution (4.3)...
7.6.Measurement. Set up the spectrometer (5.1) at a wavelength of...
22. DETERMINATION OF MAGNESIUM BY COMPLEXOMETRY
4.1.Standard 0.05 M solution of magnesium: (4.1.1) Dissolve 1.232 g...
4.3.0.05 molar standard solution of calcium. Weigh out 5.004 g...
4.4.Calcein indicator. Carefully mix in a mortar one gram of...
4.5.Calcon carbonic acid indicator. Dissolve 400 mg of calcon carbonic...
4.6.Eriochrome black — T indicator. Dissolve 300 mg of Eriochrome...
4.7.Potassium cyanide solution. Aqueous solution of KCN at 2%. (CAUTION:...
4.8.Solution of potassium hydroxide and potassium cyanide. Dissolve 280 g...
4.9.Buffer solution, pH 10.5. In a 500 ml graduated flask,...
4.10.Diluted hydrochloric acid: One volume of hydrochloric acid (ρ =...
8.1.Aliquot portions to be taken. Take aliquot portions of the...
8.2.Titration in the presence of Eriochrome black-T. Pipette an aliquot...
8.3.Titration in the presence of calcein or of calcon carbonic...
10.1.The stoichiometric EDTA-metal ratio in the complexometric analyses is always...
10.2.Complexometric indicators are often sensitive to air. The solution may...
10.3.The metal-indicator complexes are often relatively stable and it may...
10.4.The colour change of the indicator must not be observed...
10.5.This analysis requires a certain amount of experience. The task...
10.6.If an EDTA solution of guaranteed strength is used (Titrisol,...
10.7.The solutions containing potassium cyanide must not be poured down...
4.1.Diluted hydrochloric acid: One volume of hydrochloric acid (ρ =...
4.2.Barium chloride solution BaCl2.2H2O:122 grams per litre.
6.1.Sampling of the solution. Pipette an aliquot portion of one...
6.2.Preparation of the precipitate. Bring the solution to the boil....
6.3.Incineration and weighing of the precipitate. Place the filter paper...
25b. EXTRACTION OF WATER-SOLUBLE TRACE ELEMENTS
4.1.Dilute hydrochloric acid (HCI) solution, above 6 M: Mix 1...
5.2.pH-meter. (Note) Where the boron content of the extract is...
7.1.Test sample Take a quantity of fertiliser weighing between 2...
7.2.Preparation of the solution Add about 200 ml of water...
7.3.Preparation of the test solution Filter immediately into a clean,...
4.1.Dilute hydrochloric acid solution (HCI), about 6 M: Mix one...
4.2.Dilute hydrochloric acid solution (HCI), about 0.5 M: Mix one...
4.3.Lanthanum salt solutions (10 g of La per litre). This...
4.4.Calibration solutions For the preparation of these, see the individual...
6.1.Preparation of extract solutions of the trace elements to be...
6.2.Treatment of the test solution Dilute an aliquot portion of...
7.1.Preparation of a blank solution Prepare a blank solution by...
7.2.Preparation of calibration solutions From the working calibration solution prepared...
7.3.Determination Prepare the spectrometer (5) for the determination and adjust...
25e. DETERMINATION OF BORON IN FERTILISER EXTRACTS BY MEANS OF SPECTROMETRY WITH AZOMETHINE-H
4.1.EDTA buffer solution Place in a 500 ml volumetric flask...
4.2.Azomethine-H solution Place in a 200 ml volumetric flask —...
4.3.Boron calibration solutions (4.3.1) Boron stock solution (100 μg/ml) Dissolve...
6.1.Preparation of the boron solution See Methods 25a and/or 25b...
6.2.Preparation of the test solution Dilute an aliquot portion of...
6.3.Preparation of the correction solution. If the test solution (6.2)...
7.1.Preparation of the blank solution Prepare a blank solution by...
7.2.Preparation of the calibration solutions Transfer 0, 5, 10, 15,...
7.3.Colour development Transfer 5 ml of the calibration solutions (7.2),...
7.4.Determination Measure the absorbance of the solutions obtained at 7.3...
25f. DETERMINATION OF COBALT IN FERTILISER EXTRACTS BY ATOMIC ABSORPTION SPECTROMETRY
4.1.Hydrochloric acid solution, about 6 M. See Method 25d (4.1)....
4.2.Hydrochloric acid solution, about 0.5 M. See Method 25d (4.2)....
4.4.Cobalt calibration solutions. (4.4.1) Cobalt stock solution (1,000 μg/ml) In...
6.1.Cobalt extract solution See Methods 25a and/or 25b and, if...
6.2.Preparation of the test solution See Methods 25d (6.2). The...
7.1.Preparation of blank solution See Method 25d (7.1). The blank...
7.2.Preparation of calibration solutions See Method 25d (7.2). For an...
7.3.Determination See Method 25d (7.3). Prepare the spectrometer (5) for...
25g. DETERMINATION OF COPPER IN FERTILISER EXTRACTS BY ATOMIC ABSORPTION SPECTROMETRY
4.1.Hydrochloric acid solution, about 6 M See Method 25d (4.1)....
4.2.Hydrochloric acid solution, about 0.5 M See Method 25d (4.2)....
4.3.Hydrogen peroxide solution (30% H2O, p = 1.11 g/ml), free...
4.4.Copper calibration solutions (4.4.1) Copper stock solution (1,000 μg/ml) In...
6.1.Copper extract solution See Methods 25a and/or 25b and, if...
7.2.Preparation of calibration solutions See Method 25d (7.2). For an...
7.3.Determination See Method 25d (7.3). Prepare the spectrometer (5) for...
25h. DETERMINATION OF IRON IN FERTILISER EXTRACTS BY ATOMIC ABSORPTION SPECTROMETRY
4.1.Hydrochloric acid solution, about 6M. See Method 25d (4.1).
4.2.Hydrochloric acid solution, about 0.5 M See Method 25d (4.2)....
4.3.Hydrogen peroxide solution (30% H2O2 p = 1.11 g/ml) free...
4.5.Iron calibration solutions (4.5.1) Iron stock solution (1,000 μg/ml) In...
6.1.Iron extract solution See Methods 25a and/or 25b and, if...
6.2.Preparation of the test solution See Method 25d (6.2). The...
7.1.Preparation of blank solution See Method 25d (7.1). The test...
7.2.Preparation of calibration solutions See Method 25d (7.2). For an...
7.3.Determination See Method 25d (7.3). Prepare the spectrometer (5) for...
25i DETERMINATION OF MANGANESE IN FERTILISER EXTRACTS BY ATOMIC ABSORPTION SPECTROMETRY
4.1.Hydrochloric acid solution, about 6 M See Method 25d (4.1)....
4.2.Hydrochloric acid solution, about 0.5 M See Method 25d (4.2)....
4.4.Manganese calibration solutions (4.4.1) Manganese stock solution (1,000 μg/ml) In...
6.1.Manganese extract solution See Methods 25a and/or 25b and, if...
6.2.Preparation of the test solution See Method 25d (6.2). The...
7.1.Preparation of the blank solution See Method 25d (7.1). The...
7.2.Preparation of the calibration solutions See Method 25d (7.2). For...
7.3.Determination See Method 25d (7.3). Prepare the spectrometer (5) for...
4.1.Dilute hydrochloric acid solution (HCI), about 6 M See method...
4.2.Copper solution (70 mg/l) in 1.5 M hydrochloric acid Dissolve...
4.3.Ascorbic acid solution (50 g/l) Dissolve 50 g of ascorbic...
4.5.Ammonium thiocyanate solution, 0.2 M Dissolve 15.224 g of NH4SCN...
4.6.Stannous chloride solution (50 g/l) in 2 M hydrochloric acid...
4.7.Molybdenum calibration solutions (4.7.1) Molybdenum stock solution (500 μg/ml) Dissolve...
5.1.Spectrometer fitted for molecular absorption with cells having a 20...
6.1.Molybdenum extract solution See Methods 25a and/or 25b and, if...
6.2.Preparation of the test solution Dilute an aliquot portion of...
7.1.Preparation of the blank solution Prepare a blank solution by...
7.2.Preparation of the series of calibration solutions Prepare a series...
7.3.Development and separation of the complex To each separating funnel...
7.4.Determination Measure the absorbencies of the solutions obtained at 7.3...
25k. DETERMINATION OF ZINC IN FERTILISER EXTRACTS BY ATOMIC ABSORPTION SPECTROMETRY
4.1.Hydrochloric acid solution, about 6 M See Method 25d (4.1)....
4.2.Hydrochloric acid solution, about 0.5 M See Method 25d (4.2)....
4.4.Zinc calibration solutions (4.4.1) Zinc stock solution (1,000 μg/ml) In...
6.1.Zinc extract solution See Methods 25a and/or 25b and, if...
6.2.Preparation of the test solution See Method 25d (6.2). The...
7.1.Preparation of the blank solution See Method 25d (7.1). The...
7.2.Preparation of the calibration solutions See Method 25d (7.2). For...
7.3.Determination See Method 25d (7.3). Prepare the spectrometer (5) for...
26d. DETERMINATION OF TRACE ELEMENTS IN FERTILISER EXTRACTS BY ATOMIC ABSORPTION SPECTROMETRY
4.1.Diluted hydrochloric acid solution (HCI), about 6 M Mix one...
4.2.Diluted hydrochloric acid solution (HCI), about 0.5 M Mix one...
4.4.Calibration solutions For the preparation of these, see the individual...
6.1.Preparation of extract solutions containing the elements to be determined....
6.2.Treatment of the test solution Dilute an aliquot portion of...
7.1.Preparation of a blank solution. Prepare a blank solution by...
7.2.Preparation of calibration solutions From the working calibration solution prepared...
7.3.Determination Prepare the spectrometer (5) for the determination and adjust...
26e. DETERMINATION OF BORON IN FERTILISER EXTRACTS BY MEANS OF ACIDIMETRIC TITRATION
4.1.Methyl red indicator solution Dissolve 0.1 g of methyl red...
4.2.Diluted hydrochloric acid solution, about 0.5 M Mix 1 volume...
4.3.Sodium hydroxide solution, about 0.5 M Must be free of...
4.4.Standard sodium hydroxide solution, about 0.025 M Must be free...
4.5.Boron calibration solution (100 μg/ml B) Dissolve 0.5719 g of...
6.1.Preparation of the boron solution See Methods 26a, 26b and,...
7.1.Determination Place in a 400 ml beaker (5.3) an aliquot...
4.3.Diluted hydrochloric acid solution, about 6 M Mix one volume...
4.6.Solution of l-nitroso-2-naphthol in 100 ml of acetic acid (4.4)....
5.1.Filter crucible P 16/ISO 4793, porosity 4, capacity 30 or...
6.1.Preparation of the cobalt solution See Methods 26a or 26b....
6.2.Preparation of the solution to be analysed Place the aliquot...
26g. DETERMINATION OF COPPER IN FERTILISER EXTRACTS BY THE TITRIMETRIC METHOD
4.3.Ammonium bifluoride (NH4HF2) solution (10 % w/v) Keep the solution...
4.5.Sodium thiosulfate standard solution Dissolve 7.812 g of sodium thiosulfate...
4.7.Potassium thiocyanate (KSCN) solution (25 % w/v) Keep this solution...
6.1.Preparation of the solution for titration Place an aliquot portion...
6.2.Titration of the solution Place the Erlenmeyer flask on a...
26h. DETERMINATION OF IRON IN FERTILISER EXTRACTS BY ATOMIC ABSORPTION SPECTROMETRY
4.1.Hydrochloric acid solution, about 6 M See Method 26d, (4.1)....
4.2.Hydrochloric acid solution, about 0.5 M See Method 26d, (4.2)....
4.3.Hydrogen peroxide solution (30% H2O2 p = 1.11 g/ml) free...
4.5.Iron calibration solution (4.5.1) Iron stock solution (1,000 μg/ml) In...
6.1.Iron extract solution See Methods 26a and/or 26b and, if...
6.2.Preparation of the test solution See Method 26d, (6.2). The...
7.1.Preparation of the blank solution See Method 26d (7.1). The...
7.2.Preparation of calibration solutions See Method 26d, (7.2). For an...
7.3.Determination See Method 26d, (7.3). Prepare the spectrometer (5) for...
26i. DETERMINATION OF MANGANESE IN FERTILISER EXTRACTS BY TITRATION
4.8.Ferrous sulfate solution, 0.15 M Dissolve 41.6 g of ferrous...
4.9.Potassium permanganate solution, 0.02 M Weigh out 3.160 g of...
5.1.Filter crucible P16/ISO 4793, porosity 4, capacity 50 ml, mounted...
6.1.Manganese extract solution See Methods 26a and 26b. If it...
6.2.In the absence of chloride ions, place an aliquot portion...
6.3.If chloride ions are present, it is necessary to remove...
4.1.Sulfuric acid solution, approximately 1 M Carefully pour 55 ml...
4.2.Diluted ammonia solution (1:3) Mix 1 volume of concentrated ammonia...
4.3.Diluted acetic acid solution (1:3) Mix 1 volume of concentrated...
4.4.Solution of disodium salt of ethylene diamine tetraacetic acid (EDTA)...
4.5.Buffer solution In a 100 ml volumetric flask, dissolve 15...
4.6.8-hydroxyquinoline (oxine) solution In a 100 ml volumetric flask dissolve...
5.1.Filter crucible P16/ISO 4793, porosity 4, capacity 30 ml.
6.1.Preparation of the molybdenum solution. See Methods 26a and 26b....
7.1.Preparation of the test solution Place an aliquot portion containing...
7.2.Obtaining and washing the precipitate Obtaining the precipitate Heat the...
7.3.Weighing the precipitate Dry the precipitate at 130 to 135°C...
26k. DETERMINATION OF ZINC IN FERTILISER EXTRACTS BY ATOMIC ABSORPTION SPECTROMETRY
4.1.Hydrochloric acid solution, about 6 M See Method 26d (4.1)....
4.2.Hydrochloric acid solution, about 0.5 M See Method 26d (4.2)....
4.4.Zinc calibration solutions (4.4.1) Zinc stock solution (1000 μg/ml) In...
6.2.Preparation of the test solution See Method 26d, (6.2). The...
7.1.Preparation of the blank solution. See Method 26d. (7.1). The...
7.2.Preparation of the calibration solutions See Method 26d (7.2). For...
7.3.Determination See Method 26d (7.3). Prepare the spectrometer (5) for...
3.Determination of total nitrogen — chromium powder reduction method
6.Determination of the neutralising value in liming materials
7.Determination of fineness of products other than potassic basic slag...
9.Determination of fineness of certain lime products by wet sieving....
1. PREPARATION OF THE SAMPLE FOR ANALYSIS
4.1.Sample grinder capable of grinding the fertiliser to pass the...
4.3.Sieves having square apertures of 0.18 mm, 0.5 mm and...
4.4.Sample containers of non-corrodible materials, with air-tight closures.
5.2.Place the prepared sample in a clean container (4.4) and...
5.3.Before taking each test portion for analysis, the whole sample...
5.4.If the sample contains foreign matter which cannot be ground...
6.2.Products which may be difficult to grind mechanically, including products with abnormal moisture or products which become doughy through grinding
3. DETERMINATION OF TOTAL NITROGEN CHROMIUM POWDER REDUCTION METHOD
3.1.Sodium hydroxide solution: 40 g per 100 ml, ammonia free....
3.7.Anti-bump granules of pumice stone, washed in hydrochloric acid and...
3.11.Catalyst mixture: 1,000 g potassium sulfate and 50 g copper...
3.12.Indicator solutions: (3.12.1) Mixed indicator: mix 50 ml of 2...
6.2.Hydrolysis, when the fertiliser is known not to contain organic matter
6.3.Digestion, when the fertiliser is known to contain organic matter
3.2.Carrez solution I: dissolve 21.9 g zinc acetate dihydrate in...
3.3.Carrez solution II: 10.6 g potassium ferrocyanide per 100 ml....
3.5.Sodium acetate solution: 136 g sodium acetate trihydrate per litre....
3.6.4-dimethylaminobenzaldehyde solution: dissolve 1.6 g of 4-dimethylaminobenzaldehyde (4-DMAB) in 100...
5. DETERMINATION OF POTASSIUM — GRAVIMETRIC METHOD
3.<1 Formaldehyde, 25 – 35% solution, filtered if necessary before use.
3.3.Sodium hydroxide, 10 M solution. Care should be taken to...
3.4.Indicator solution: dissolve 0.5 g phenolphthalein in 100 ml 90%...
3.5.EDTA solution: 4 g of the dihydrated disodium salt of...
3.6.STPB solution: dissolve 32.5 g sodium tetraphenylborate in 480 ml...
3.7.Liquid for washing: dilute 20 ml of the STPB solution...
6. DETERMINATION OF THE NEUTRALISING VALUE IN LIMING MATERIALS
7. DETERMINATION OF FINENESS OF PRODUCTS OTHER THAN POTASSIC BASIC SLAG
9. DETERMINATION OF FINENESS OF CERTAIN LIME PRODUCTS BY WET SIEVING
3.2.Stainless steel woven wire test sieves 100 mm diameter, complying...
3.3.Stainless steel woven wire test sieves complying with ISO 3310...
4.1.Procedure for samples with dry matter content <60% Pass the...
4.2.Procedure for samples with dry matter content<60% which cannot be...
7.1.Original dry mass Calculate the original dry mass (Md) of...
7.2.Sieve fraction Calculate the percentage of material retained on each...
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