Method for the preparation of samples

A method for the preparation of samples by means of a dosage-dispensing device comprising a weighing system with a load receiver, a processor unit, a memory unit, an ionizer, and an exchangeable dosage-dispensing unit, wherein one of a target container set on the load receiver or the dosage-dispensing unit comprises electrically insulating material, and wherein the dosage-dispensing unit has the capability to slide or swivel between a first position and a second position relative to the load receiver, the method comprising the steps of:

• (a) receiving at the processor unit from the weighing system and storing in the memory unit a starting weight value while the dosage-dispensing unit is at rest in the first position and the target container is on the load receiver;
• (b) after the dosage-dispensing unit is moved to the second position, transmitting from the processor unit to the dosage-dispensing unit a request to dispense into the target container a predetermined amount of mass;
• (c) after the dosage-dispensing unit is returned to the first position and is at rest, receiving at the processor unit from the weighing system an ending value;
• and
• (d) receiving at the processor unit from the weighing system intermediate weight values when the ionizer is switched off.