EN ISO 9831:2003 PDF

Animal feeding stuffs, animal products, and faeces or urine - Determination of gross calorific value - Bomb calorimeter method (ISO 9831:1998)

Title (English):

EN ISO 9831:2003

Animal feeding stuffs, animal products, and faeces or urine - Determination of gross calorific value - Bomb calorimeter method (ISO 9831:1998)

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 26
Publication date:: November 26, 2003
Edition:: CEN EN 9831 edition 1 version 1
ICS:: 17.200.10

Document language:

enru

Delivery time:1–7 days

Price:74 €

Description (English):

Diese Internationale Norm legt ein Verfahren zur Bestimmung des kalorischen Bruttowertes von Futtermitteln, tierischen Produkten und Kot oder Urin bei konstantem Volumen in einem adiabatischen, isothermen oder statischen Bombenkalorimeter fest. Das mit diesem Verfahren gewonnene Ergebnis ist der kalorische Bruttowert der Prüfprobe bei konstantem Volumen, wobei das Wasser der Verbrennungsprodukte bei der Temperatur des Kalorimeters in den flüssigen Zustand kondensiert wird. ANMERKUNG Die internationale Referenztemperatur von 25 °C für die Thermochemie wird als Referenztemperatur für den kalorischen Wert verwendet, obgleich die Temperaturabhängigkeit des kalorischen Wertes der Materialien, für die diese Internationale Norm gilt, gering ist (etwa 1 J × g-1 × K-1).

Technical details

Technical committee: CEN/TC 327 - Animal feeding stuffs - Methods of sampling and analysis
SKU: EN ISO 9831:2003

Abstract

Overview

EN ISO 9831:2003 (adopted as SIST EN ISO 9831:2004) specifies the bomb calorimeter method for determining the gross calorific value (constant-volume) of animal feeding stuffs, animal products, faeces and urine. This European adoption is identical to ISO 9831:1998 and was prepared under CEN/TC 327. The method yields the gross calorific value with combustion in oxygen in an adiabatic, isothermal or static bomb calorimeter; combustion water is condensed to liquid at the calorimeter temperature (reference temperature 25 °C).

Key topics and technical requirements

Principle: Combust a weighed test portion in a bomb calorimeter and calculate gross calorific value from the temperature rise and the calorimeter’s effective heat capacity.
Reagents & materials: analytical-grade water (ISO 3696), oxygen (free from combustibles), benzoic acid thermochemical standard (for calibration), fused ignition materials (nickel/chromium or platinum wire, cotton thread, polyethylene strip).
Apparatus:
- Bomb capable of complete recovery of liquid combustion products and resistant to acidic corrosion.
- Calorimeter vessel with constant stirring and a suitable water jacket (adiabatic, isothermal or static).
- Temperature instrument with corrected accuracy to 0.002 °C (suitable resistance or mercury thermometers per ISO standards).
- Crucibles (silica, nickel/chromium or platinum) and ignition circuit (6–12 V supply).
- Ancillaries: analytical balance (0.1 mg), briquette press, pressure regulator/gauge for O2 (bomb filled to ~3 MPa), relief valve.
Procedure & corrections: Includes allowances for energy from ignition fuse, thermochemical corrections, and calorimeter heat losses. Annex A covers determining the calorimeter’s effective heat capacity; Annex B gives sample-preparation procedures.
Documentation: Sections on precision, expression of results and required test report content are included.

Applications and users

Quality control and energy-content analysis in feed mills and production facilities.
Nutritional research and formulation by animal nutritionists to calculate dietary energy.
Environmental and waste characterization for manure/faeces/urine energy or mass-balance studies.
Accredited laboratories performing regulatory testing and certification.

Related standards

ISO 1928 (gross calorific value for solid mineral fuels) - referenced methodology parallels.
ISO 3696 (water for analytical use), ISO 651/652/1770/1771 (thermometers), ISO 6496 / ISO 6498 (moisture/sample prep for feeding stuffs) - normative references cited in EN ISO 9831.

Keywords: EN ISO 9831, bomb calorimeter, gross calorific value, animal feeding stuffs, animal products, faeces, urine, calorimetric method, CEN, feed analysis, energy content.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and technical requirements

Principle: Combust a weighed test portion in a bomb calorimeter and calculate gross calorific value from the temperature rise and the calorimeter’s effective heat capacity.
Reagents & materials: analytical-grade water (ISO 3696), oxygen (free from combustibles), benzoic acid thermochemical standard (for calibration), fused ignition materials (nickel/chromium or platinum wire, cotton thread, polyethylene strip).
Apparatus:
- Bomb capable of complete recovery of liquid combustion products and resistant to acidic corrosion.
- Calorimeter vessel with constant stirring and a suitable water jacket (adiabatic, isothermal or static).
- Temperature instrument with corrected accuracy to 0.002 °C (suitable resistance or mercury thermometers per ISO standards).
- Crucibles (silica, nickel/chromium or platinum) and ignition circuit (6–12 V supply).
- Ancillaries: analytical balance (0.1 mg), briquette press, pressure regulator/gauge for O2 (bomb filled to ~3 MPa), relief valve.
Procedure & corrections: Includes allowances for energy from ignition fuse, thermochemical corrections, and calorimeter heat losses. Annex A covers determining the calorimeter’s effective heat capacity; Annex B gives sample-preparation procedures.
Documentation: Sections on precision, expression of results and required test report content are included.

Applications and users

Quality control and energy-content analysis in feed mills and production facilities.
Nutritional research and formulation by animal nutritionists to calculate dietary energy.
Environmental and waste characterization for manure/faeces/urine energy or mass-balance studies.
Accredited laboratories performing regulatory testing and certification.

Related standards

ISO 1928 (gross calorific value for solid mineral fuels) - referenced methodology parallels.
ISO 3696 (water for analytical use), ISO 651/652/1770/1771 (thermometers), ISO 6496 / ISO 6498 (moisture/sample prep for feeding stuffs) - normative references cited in EN ISO 9831.

Keywords: EN ISO 9831, bomb calorimeter, gross calorific value, animal feeding stuffs, animal products, faeces, urine, calorimetric method, CEN, feed analysis, energy content.

EN ISO 9831:2003 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Applications and users

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Applications and users

Related standards

Related standards

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