Determination after pre-treatment of the sample material
a) Thermal treatment
thermal decomposition of soil organic matter according to the loss on ignition procedure: Muffle Furnace (450 °C, 16 h)
soil, air dried (40 °C), 250 (...1000) mg, ceramic cups
subsequent measurement of the remaining TIC in the ceramic cups: vario MAX
results — water content!
limit of quantification: 0.116 mg C
precision 0.3 - 2 %
indirect quantification: TOC = TC -TIC