Comprehensive two-dimensional gas chromatography with a multi-capillary second dimension: a new column-set format for simultaneous optimum linear velocity operation.

•Identical narrow-bore capillary columns successfully assembled in parallel.•Multi-capillary columns provide good efficiency at high volumetric flows.•Multi-capillary columns are interesting second dimensions for GC×GC.•GC×multi-GC is suitable for the multidimensional separation of complex samples.•Possible to operate both dimensions at their optimum linear velocity simultaneously.