Overview of important soil parameters


Parameter Standard Sample preparation Detection type Titrant
pH value ISO 10390 Slurrying Direct measurement -
pH value for the determination of
the leaching behaviour of inorganic components from waste
DIN CEN/ TS 14997 Continuous pH control to
determine the influence of
pH value on leaching behaviour
Direct measurement (with continuous eluate analysis) -
Conductivity ISO 1265 Slurrying Direct measurement -
Total organic carbon
(TOC), Walkley-Black method
- K2Cr2O7/H2SO4
digestion
Visually with barium
diphenylamine sulfonate
1 mol/L FeSO4
(acidic)
Aluminium - Extraction Visually, phenolphthalein 0.02 mol/L NaOH
Carbonate content, Piper method
(also known as rapid titration or acid neutralisation method)
- Soil sample is shaken with
0.2 mol/L HCl and allowed to
settle; 10 mL of the supernatant solution is back-titrated with NaOH
a) Photometrically with phenolphthalein

b) Potentiometrically,
SET titration to pH 7.8
0.1 mol/L NaOH
Acidity
«Exchangeable acidity» (H + Al)
- Ion exchange with
1 mol/L KCl
a) Photometrically with phenolphthalein

b) Potentiometrically,
SET titration to pH 7.6
0.025 mol/L NaOH
Total cyanide and easily released cyanide ISO 1262 Distillation a) Photometrically with phenolphthalein

b) Potentiometrically
0.005 mol/L AgNO3
Soluble anions carbonate/bicarbonate (alkalinity) - Extraction with CO2-free dist. water SET titration to pH 8.4 and 4.4 0.1 mol/L HCl