Schemes of interlaboratory tests for combustibles




Beginning with July 2011, CEPROCIM Testing Laboratory develops a new scheme of Interlaboratory Tests at national level, for Combustibles; interlaboratory tests will have a yearly frequency.

1.1 Yearly calendar of Interlaboratory Tests for Combustibles

July Launch the invitation for pre-registration; Participants pre-registration; Preparing the parcels with sample and with the necessary documents (guidelines, forms).
August Launch the invitation for participation; Participants registration; Sending to the participants (rapid mail delivering) the parcels with sample and documents.
September –

15th October

The participants carrying out tests and sending results to CEPROCIM
November – December Statistical processing of data according to ISO 13528:2005; Evaluation of the results based on z-score according to SR EN ISO/CEI 17043:2010;

Drawing up General Report and its multiplication

1)Registration form at the Interlaboratory Tests for Combustible edition I, 2011 (mai mult)

2)Guidelines and Forms afferent to Interlaboratory tests for Combustible edition I, 2011 (mai mult)

1.2 Determinations which make the object of Interlaboratory Tests for Combustibles

  • Humidity for analysis,(Wa)
  • Ash,(Aanh)
  • Carbon,(Canh)
  • Total sulfur,(Stanh)
  • Chlorine,(Clanh)
  • Hydrogen,(Hanh)
  • Volatile substances,(Vanh)
  • Gross calorific value, (Qsanh)
  • Net calorific value,(Qianh)

The determinations that make the subject of Interlaboratory Tests for Combustibles are performed by each participant using the current testing methods from their daily testing activity.

At the first edition of interlaboratory tests for the combustibles, edition 2011, the working methods were not imposed. However, it is appreciated that main principle of the methods and of apparatus used by participants together with results reporting in dry state, is constituted in premises for correct inter-comparison of the results.



  • Specific equipments for preparing samples for investigation
    • sets of sieve, niche laboratory
  • Equipments and accessories for analyses and testing
    • Analytical and technical weights, systems for water distillation, ovens, furnaces, calorimetric bomb, carbon analyser
  • Equipments for assurance and monitoring of microclimate conditions
    • air-conditioning systems, thermometers
  • Techniques of calculation and dedicated programs



  1. General Report  –  Interlaboratory tests for combustibles  – 2011