Toxic substances can be isolated from the objects of biological origin by different methods. In case of poisoning with pesticides - derivatives of phosphoric acids -the following method is applied:

Answer options

1. Distillation with water steam from the alkaline medium
2. Infusion with water acidified with chloric acid
3. Infusion with alkalized water
4. Dialysis aout of alkalized solutions
5. Infusion with organic solvents