Organic and inorganic carbon storage in riparian zones of Central European rivers A comparison of methods for their determination

0584907 - ÚVGZ 2025 RIV GB eng J - Journal Article
Babej, Ján - Červenka, R. - Kuta, J. - Brabec, K. - Máčka, Z.
Organic and inorganic carbon storage in riparian zones of Central European rivers A comparison of methods for their determination.
Quaternary International. Roč. 681, JAN (2024), s. 44-51. ISSN 1040-6182. E-ISSN 1873-4553
R&D Projects: GA MŠMT LM2023048
Institutional support: RVO:86652079
Keywords : loss-on-ignition * titration method * total nitrogen * sediments * matter * soils * quantification * Calcimeter * Dry combustion * Carbon * Loss on ignition * Organic matter * WalkleyBlack method
OECD category: Physical geography
Impact factor: 2.2, year: 2022
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S1040618223003804?via%3Dihub

Increasing interest in carbon storage and fluxes in river systems opens space for comparison of methods for the determination of total organic carbon (TOC) and inorganic carbon (TIC) in soil/sediment samples. We analysed 150 soil (leptosols and fluvisols) and sediment samples from three rivers using methods mostly used in studies. Widely used dry combustion method (with CO2 detection) for determination of TOC and TIC was compared with other methods for determination TOC (modified Walkley-Black method), total organic matter (TOM determined by loss on ignition) and TIC (calcimeter, loss on ignition). Furthermore, we proposed a procedure for calculation TOC from TOM together with relative standard deviation resulting from this conversion. Our results showed that the modified Walkley-Black method provides almost identical results of TOC as dry combustion and therefore can be used as an alternative method for the determination of TOC. A strong correlation was found between TOC and TOM (R2 = 0.97 for both methods for determination TOC). The mean relative deviation of TOC values resulting from calculation TOC based on TOM varied between 10.1% and 14.5%. Thus, the calculation TOC from TOM is possible, but only with deviations referred to above. We suggest that for samples with TOM values below 1%, the TOC values cannot be reliably calculated, and in this case, the dry combustion or modified Walkley-Black method must be used for TOC determination. TIC values determined by the three methods vary to a greater extent than those of organic carbon. We assume that in the case of low TIC content (below 1%), various methods can give markedly different results. Due to the higher relative standard deviation in case of dry combustion, it is probably better to use a calcimeter for the determination of TIC in samples with TIC content below 1%.
Permanent Link: https://hdl.handle.net/11104/0353053