ДСТУ EN ISO 6865:2022 Корма для животных. Определение содержания сырой клетчатки. Метод промежуточной фильтрации (EN ISO 6865:2000, IDT; ISO 6865:2000, IDT)
ДСТУ EN ISO 6865:2022
(EN ISO 6865:2000, IDT; ISO
6865:2000, IDT)
Корми для тварин. Визначення вмісту сирої клітковини. Метод із проміжною фільтрацією
Не є офіційним виданням.
Офіційне видання розповсюджує національний орган стандартизації
(ДП «УкрНДНЦ» http://uas.gov.ua)
Contents
Foreword
1 Scope
2 Normative references
3 Term and definition
4 Principle
5 Reagents and materials
5.1 Water, complying with at least grade 3 in accordance with ISO 3696.
5.2 Hydrochloric acid, c(HCI) = 0,5 mol/l.
5.3 Sulfuric acid, c(H2SO4) = (0,13 ± 0,005) mol/l.
5.4 Potassium hydroxide solution, c(KOH) = (0,23 ± 0,005) mol/l.
5.5 Acetone
5.6 Filter aid: sea sand , or Celite®[I] > 545, or material of an equivalent quality.
5.7 Antifoam agent, for instance n-octanol.
5.8 Light petroleum, boiling range 40 °С to 60 °С.
6 Apparatus
6.1 Grinding device, capable of grinding the sample so that it passes completely through a sieve with 1 mm apertures.
6.2 Analytical balance, with accuracy of at least 0,1 mg.
6.3 Filter crucibles, of quartz, porcelain or hard glass, with fused sintered filter plate with a pore size of 40 pm to 100 pm (porosity grade P 100 according to ISO 4793:1980 [1]).
6.4 Porcelain sieve plates.
6.5 Incineration dishes.
6.6 Beakers or conical flasks, of 500 ml capacity, provided with a suitable cooling device, for example a condensor or a dish.
6.7 Drying oven, electrically heated and ventilated, capable of being maintained at a temperature of (130 ±2) °С.
6.8 Desiccator, containing blue silicagel as desiccant, provided with a perforated plate, preferably of aluminium or stainless steel, of thickness 2 mm to 3 mm.
6.9 Muffle furnace, electrically heated, provided with air circulation and temperature control capable of maintaining the temperature around the crucibles to the nearest 25 °С at temperatures of 475 °С to 525 °С.
6.10 Cold-extraction device, provided with
6.11 Heating device (for manual method), provided with a suitable cooling device capable of maintaining the volume constant during boiling.
6.12 Heating device
7 Sampling
8 Preparation of test sample
9 Procedure for manual method
9.1 Test portion
9.2 Preliminary defatting
9.3 Removal of carbonate
9.4 Acid digestion
9.5 First filtration
9.6 Defatting
9.7 Alkaline digestion
9.8 Second filtration
9.9 Drying
9.10 Ashing
9.11 Blank determination
10 Procedure for semi-automatic method
10.1 Test portion
10.2 Preliminary defatting
10.3 Removal of carbonate
10.4 Acid digestion
10.5 First filtration
10.6 Defatting
10.7 Alkaline digestion
10.8 Second filtration
10.9 Drying
10.10 Ashing
10.11 Blank determination
11 Calculation
12 Precision
12.1 Interlaboratory tests
12.2 Repeatability
12.3 Reproducibility
13 Test report
Annex A (informative) Results of interlaboratory tests
Bibliography
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