Karakteristieken - Calciumcarbonaat gehalte

Page / - laatst gewijzigd door Roelof Zwaan op 2021/11/30 15:09

Calciumcarbonaat gehalte

laatst gewijzigd door Roelof Zwaan

op 2021/11/30 15:09

Inhoudsopgave

Calciumcarbonaat gehalte

To determine the amount of chalk (CaCO3) present in a soil sample one needs to use hydrochloric acid (10% HCl) and drip this on the sample. The amount of fizzing is the indication for the amount of chalk present. One must take into consideration that the fizzing is also determined by the speed of the hydrochloric acid in the sediment. For example: sand will give a quicker and more violent fizzing than clay, but clay will fizz for a longer time.

Amount of calcium

Indicator	Reaction 10% HCl
Calcium free	No fizzing, less than 0.5% CaCO3
Low calcium	Audible fizzing, about 0.5% CaCO3
Slightly calcareous	Audible fizzing and very less visible, about 1 % CaCO3
Calcareous	Audible fizzing and less visible, about 2% CaCO3
Calcium rich	Visible fizzing, more than 1 or 2% CaCO3

References

NEN-EN-ISO 14688-1:2019

Contents

Amount of calcium

References