Qualification of a precision pattern dispenser

In order to automate sample preparation processes, a precision pattern dispenser was designed to reproducibly dispense radioactive solutions at pre-defined positions. It is composed of an automatic liquid sample handling unit coupled to an XYZ table. Qualification tests were conducted to evaluate the performance of the instrument and to assess the compliance with the requirements, in particular trueness (< 2%) and repeatability (< 1%). The instrument allows preparing sources in different source holders and on air filters, in a fast and accurate way. •A precision dispenser was developed in order to automate source preparation.•Flexible to dispense pre-set amounts of liquid in different kinds of sample holders.•Different spiking patterns (size, amount per spot) can be dispensed on air filters.•Qualification proved repeatability