Blood samples are taken using vacuum test tubes with lithium heparin as an anticoagulant, diluted with deionized  water or 0.1 % (m/v) Triton X-100 solution. The diluted sample (10 µl) is then injected into the graphite furnace  of the spectrometer mixed / along with the appropriate matrix modifier. Measurement data is collected and  processed by the dedicated software included in the delivery set.