Workflow timing between modules

The invention relates to an analytical system comprising a sample cell for distributing a sample comprising a nucleic acid analyte to a processing vessel, a cell for purifying and isolating a nucleic acid analyte comprising a separation station, an amplification module and a transfer module for transferring vessels between said cells and modules. Each cell or module has a specific, pre-defined timing for transferring and processing the nucleic acid analyte. The timing for transfer and processing within the sample cell is independent of the timing of transfer and processing within the cell for purifying and isolating an analyte and the amplification module, the timing of the cell for isolating a nucleic acid anaylte is independent of the timing of the amplification module, and the timing in said sample cell, said cell for isolating a nucleic acid analyte and said amplification module is identical for any one nucleic acid analyte which is isolated and analyzed.