The digestion steps of soil

PFA sample dissolving vial 15ml matching anti-corrosion electric heating digestion instrument digestion steps of soil:

1. Hydrofluoric acid + perchloric acid + nitric acid is less than 5ml, according to 1:1:1

Soil samples less than 0.2g

2. Put the sample into a 15ml PFA sample dissolving vial, put it on an anti-corrosion electric heating plate, and keep it airtight for digestion at less than 110°C: 8-10 hours

3. The above airtight + open digestion time is 10-20 hours in total, and sometimes the electric heating plate is not turned off at night (provided that the electric heating plate has a timer shutdown function)