Overview
SIST EN ISO 9831:2004 specifies the standardized procedure for the determination of the gross calorific value of animal feeding stuffs, animal products, and faeces or urine using the bomb calorimeter method. This European and international standard delivers a reliable framework for laboratories, nutritionists, and feed manufacturers to assess the energy content in animal-related materials. The robust method ensures comparability and consistency in calorific value determination, supporting quality control and product formulation in the animal nutrition and feed industry.
Key Topics
- Gross Calorific Value: The total quantity of heat released when a sample is combusted in a bomb calorimeter under specified conditions.
- Bomb Calorimeter Method: Combustion of a weighed test portion in oxygen within a sealed calorimeter, capturing and measuring the heat generated.
- Applicable Test Materials: Covers various matrices including animal feed, animal-derived products, faeces, and urine.
- Standardized Conditions: Specifies using adiabatic, isothermal, or static bomb calorimeters at constant volume, ensuring reproducible results.
- Corrections and Calculations: Involves detailed corrections for ignition materials, heat loss, acid formation, and incomplete combustion to ensure accurate calorific determination.
- Quality Assurance: Defines repeatability and reproducibility metrics, as well as requirements for calibration and test reporting.
Applications
SIST EN ISO 9831:2004 and the bomb calorimeter method are widely used in:
- Animal Feed Industry: Determining the energy content of raw and processed feeds for formulation and labelling.
- Nutritional Studies: Measuring the calorific value of animal products, faeces, and urine for assessing digestion and energy utilization.
- Regulatory Compliance: Supporting legal and quality standards for animal feedstuffs by providing reliable calorific value data.
- Research and Development: Enabling the comparison of different feed materials, by-products, or nutritional interventions.
- Environmental Analysis: Evaluating energy content in animal wastes for potential use in energy recovery or biogas production.
The method is essential wherever the precise determination of gross calorific value impacts feed evaluation, ration formulation, or environmental management in agriculture.
Related Standards
- ISO 1928: Solid mineral fuels - Determination of gross calorific value by the bomb calorimeter method.
- ISO 3696: Water for analytical laboratory use - Specifications and test methods.
- ISO 6496: Animal feeding stuffs - Determination of moisture and volatile matter content.
- ISO 6498: Animal feeding stuffs - Preparation of test samples.
- ISO 651 & ISO 652: Thermometers for calorimeter use.
- ISO 1770 & ISO 1771: Specifications for general-purpose thermometers.
These related standards provide methods for sample handling, instrument calibration, and supplementary analytical procedures, supporting the robust application of SIST EN ISO 9831:2004 in laboratory settings.
By following SIST EN ISO 9831:2004, laboratories and industry professionals can ensure precise, standardized measurement of the gross calorific value in animal feeds and by-products, contributing to improved feed quality, animal health, and compliance with international best practices.
