*3.1. Materials*

The automatic system for the technetium/molybdenum liquid–liquid flow extraction on a microscale is composed of:


Other materials involved in the process are: H2O<sup>2</sup> 30% *w/w* (Titolchimica, Rovigo, Italy), methyl ethyl ketone (Carlo Erba, Milano, Italy), NaOH and sodium chloride 0.9% (Fresenius Kabi, Verona, Italy); [99mTc]NaTcO4, in physiological solution eluted by a <sup>99</sup>Mo/99mTc generator (UTK, Curium, London). Silica and acidic alumina SepPak Cartridges were purchased from Waters Corporation (Milford, MA, USA). Natural molybdenum metal target (natMo, 99.95% purity, 150 mg) were produced by Spark Plasma Sintering technique (SPS) [46].
