RT other
T1 Determination of the organic matter in soils and sediments by dichromatometry.
A1 Milla González, Miguel
A2 Química Analítica
K1 quantitative analysis
K1 redox titrations
K1 dichromatometry
K1 Walkley and Black method
K1 organic matter
K1 organic matter in soils and sediments
K1 determination of organic matter in soils
K1 determination of organic matter in sediments
K1 organic carbon in soils and sediments
K1 ferroin
K1 stoichiometric factors
K1 stoichiometric calculations
K1 simulated lab experiment
K1 interactive chemistry
AB In this interactive exercise, the determination of organic matter in sediments (or soils) is carried out using a dichromatometric titration. The organic matter is oxidized by treatment with excess dichromate for 30 minutes. Once the oxidation is completed, the excess dichromate is titrated with ferrous salt solution using ferroin as indicator. The standardization of the Fe(II) salt is performed vs. the same volume of oxidant solution used for oxidation of the sample. All steps of the procedure are described and finally the mg of C per gram of sample analyzed is calculated, as well as the percentage of  C and the percentage of organic matter in the sample. Data are generated randomly. The conversion expression of milliliters dichromate to milligrams carbon and the chemical background of the method are also explained.
YR 2014
FD 2014-07-14T00:00:00Z
LK http://hdl.handle.net/10498/16547
UL http://hdl.handle.net/10498/16547
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 13-nov-2026