PTFEmembranes(10mof pore size, 100minthickness) were employed for the construction of the extraction unit. The 1mL empty SPE cartridges and PTFE top-caps, necessary to construct the extraction devices, were obtained from Supelco (Madrid, Spain).
PTFEmembranes(10mof pore size, 100minthickness) wereemployed for the construction of the extraction unit. The 1mLempty SPE cartridges and PTFE top-caps, necessary to construct theextraction devices, were obtained from Supelco (Madrid, Spain).