Two-dimensional gas technology or GC x GC, was originally described in 1991, this technology allows separation of compounds unresolved in a single column. At the outlet of the column, fragments are sent to a second column (generally in an opposite phase) where a second separation is carried out, obtaining two-dimensional chromatograms with 3D graphical representation. This technology allows the separation of complex samples, such as gasoline or flavors and fragrances. Modulation (step from column to column) can be performed with thermal or microfluidic systems. In Ingenieria Analitica we are distributors of the two modulation systems.