Examples of methods

A given technique can be implemented under different conditions, thus giving rise to several methods, depending on the context of the extraction (sample, compounds to be extracted). An illustration of the SPE technique is given here.

Technique:
Solid-phase extraction (SPE) Several steps:
1- Phase conditioning
2- Percolation of the sample
3- Possible washing (and/or drying)
4- Elution of compounds of interest

Method 1:
ochratoxin A extraction from wine Details of the steps:
1- 2 mL ACN + 2 mL water
2- percolation of the sample
3- 5 mL water + 5 mL ACN/water
4- 2 mL MeOH/formic acid
Marino-Repizo et al. Food Chem. 172 (2015) 663-668

Method 2:
extraction of pesticides from fruit juices Details of the steps:
1- 4 mL CH₂Cl₂ + 4 mL MeOH + 5 mL water
2- percolation of the sample
3- cartridge is dried for 30 mins
4- 5 mL MeOH + 5 mL CH₂Cl₂
Romero-Gonzalez et al. Talanta 76 (2008) 211-225