1 Introduction 7
2 The Problem 8
2.1 Can the rH value be used Or determining the redox Dandyions of
natural organic materials?
2.2 How much Ume is necessary Or reduction of organic matter-
geological periods or much aborter? 8
2.3 Why does peat have teigher rH values than brown coal? 9
3 Measurement of redox potential of peat brown coat limic mud and
model materials 9
3.1 Sampling 9
3.2 Sample preparation for redox measurements 10
3.3 Measurement of the redox potential 11
3.4 Calculation of Eb and rH values
4 Can the rig value be used for determining the redox conditions of
natural organic materials? 13
4.1 Results of long-term tests on various Actors influencing the rH
value 13
4.2 Experiments to determine Eb/pH ratio using model materials 13
5 rH values of brogan coal and peat 14
5. 1 rH values of brown coal 14
5.2 rH values of peat 16
6 Influence of time and other factors on the complete reduction of
organic matter 17
6.1 Long-term tests 17
6.1.1 pH changes 18
6.1.2 Redox changes 20
6.2 Supplementary tests 21
7 Why does peat have higher pH values than brown coal? 22
8 Capacity factor of the redox potential of natural organic matter 23
9 Conclusions 24
10 References 25