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