PREN 15936 : DRAFT 2009

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Safety remarks
5 Principle
   5.1 General
   5.2 Method A (indirect procedure)
   5.3 Method B (direct procedure)
   5.4 Applicability of Methods A or B
6 Interferences and sources of errors
7 Reagents
   7.1 General
   7.2 Calcium carbonate
   7.3 Sodium carbonate
   7.4 Tetrasodium ethylenediamine tetraacetate-tetra-hydrate
   7.5 Potassium hydrogen phthalate
   7.6 Acetanilide
   7.7 Atropine
   7.8 Spectrographic graphite powder
   7.9 Sodium salicylate
   7.10 Aluminium oxide
   7.11 Control mixture A
   7.12 Control mixture B
   7.13 Non-oxidizing mineral acid
   7.14 Synthetic air, nitrogen, oxygen or argon
8 Apparatus
9 Sampling and sample pre-treatment
   9.1 Sampling
   9.2 Sample pre-treatment
10 Procedure - Method A (Indirect method)
   10.1 Determination
        10.1.1 General
        10.1.2 Determination of the TC
        10.1.3 Determination of the TIC
   10.2 Calibration
   10.3 Control measurements
   10.4 Calculation and expression of results
11 Procedure Method B (direct method)
   11.1 Determination
        11.1.1 General
        11.1.2 Removal of the inorganic carbon and
               determination of TOC
   11.2 Calibration
   11.3 Control measurements
   11.4 Calculation and expression of results
12 Precision data
13 Test report
Annex A (informative) - Validation of dry combustion methods
  A.1 General
  A.2 Additional results of inter-laboratory studies
       A.2.1 Influence of temperature and modifiers on
              the decomposition of barium carbonate as an
              example for a refractory compound
       A.2.2 Influence of aluminium oxide or sodium sulphate
              used for sample preparation on the recovery
              of TOC
       A.2.3 Influence of TIC/TOC ratio on the recovery and
              the coefficient of variation
       A.2.4 Method A: recovery of TOC for the control
              mixture A (7.11)
       A.2.5 Method B: influence of the temperature during
              the removal of inorganic carbon on the
              recovery of TOC
Annex B (informative) - Repeatability and reproducibility data
  B.1 Materials used in the interlaboratory study
  B.2 Interlaboratory results
  B.3 Repeatability and reproducibility
Annex C (Informative) - Determination of total organic carbon
        (TOC) in solid samples using the suspension method
  C.1 General
  C.2 Application range
  C.3 Basic principle of the method
  C.4 Reagents
       C.4.1 Water used for dilution
       C.4.2 Potassium hydrogen phthalate
       C.4.3 Hydrochloric acid
       C.4.4 Gases
  C.5 Apparatus
       C.5.1 General
       C.5.2 Homogenisation
  C.6 Implementation
       C.6.1 Calibration
       C.6.2 Control experiments
       C.6.3 Determination
  C.7 Evaluation of the results
       C.7.1 General
       C.7.2 Blank value
  C.8 Method characteristics
Annex D (informative) - Comparison of validation results with
        earlier validation studies using the same method
Bibliography