Foreword
1 Scope
2 Normative references
3 Principle
4 Reagents
5 Apparatus
6 Sampling and samples
  6.1 Laboratory sample
  6.2 Preparation of predried test samples
7 Procedure
  7.1 Number of determinations
  7.2 Safety precautions
  7.3 Test portion
  7.4 Blank test and check test
  7.5 Determination
      7.5.1 Decomposition of the test portion
      7.5.2 Treatment of the test solution
      7.5.3 Adjustment of the atomic absorption
            spectrometer
      7.5.4 Atomic absorption measurements
8 Expression of results
  8.1 Calculation of mass fraction of manganese
  8.2 General treatment of results
      8.2.1 Repeatability and permissible tolerance
      8.2.2 Determination of analytical result
      8.2.3 Between-laboratories precision
      8.2.4 Check for trueness
      8.2.5 Calculation of final result
  8.3 Oxide factor
9 Test report
Annex A (normative) - Flowsheet of the procedure for the
        acceptance of analytical values for test samples
Annex B (informative) - Derivation of repeatability and
        permissible tolerance equations
Annex C (informative) - Precision data obtained by
        international analytical trials