Apparatus for automated sampling of a liquid sample from a vessel in which there may be a pressure of at least 20 bar, preferably of at least 50 bar, further preferably of at least 100 bar, more preferably of at least 150 bar, wherein the apparatus comprises the following: • a sample circuit comprising a first multiport valve having at least 6 ports, a feed conduit, a drain conduit and a sample loop, wherein a liquid sample of the solution present in the vessel can be taken via the sample circuit; • a solvent circuit comprising a reservoir vessel for the solvent, a second multiport valve having at least 6 ports, a pump, a feed conduit, a drain conduit and a solvent loop, wherein solvent for dilution of the sample can be added via the solvent circuit; • one or more sample vessels into which the liquid sample, preferably diluted with the solvent, can be routed; • a sample distribution unit comprising a third multiport valve having at least 3 ports and at least one conduit connected to the one or more sample vessels, wherein the sample taken from the vessel can be routed via the conduit into the at least one sample vessel; and • an inert gas circuit in which there is an inert gas, wherein the inert gas circuit comprises at least one valve, a feed conduit, a drain conduit, and conduits (13, 17, 18, 23) via which all the multiport valves present are connected to one another, characterized in that the apparatus for automated sampling comprises a pressure regulation unit with which the samples can be brought to ambient pressure, wherein the pressure regulation unit comprises a further multiport valve having a restriction capillary and wherein the further multiport valve is disposed between the first multiport valve and the third multiport valve. • a sample circuit comprising a first multiport valve having at least 6 ports, a feed conduit, a drain conduit and a sample loop, wherein a liquid sample of the solution present in the vessel can be taken via the sample circuit; • a solvent circuit comprising a reservoir vessel for the solvent, a second multiport valve having at least 6 ports, a pump, a feed conduit, a drain conduit and a solvent loop, wherein solvent for dilution of the sample can be added via the solvent circuit; • one or more sample vessels into which the liquid sample, preferably diluted with the solvent, can be routed; • a sample distribution unit comprising a third multiport valve having at least 3 ports and at least one conduit connected to the one or more sample vessels, wherein the sample taken from the vessel can be routed via the conduit into the at least one sample vessel; and • an inert gas circuit in which there is an inert gas, wherein the inert gas circuit comprises at least one valve, a feed conduit, a drain conduit, and conduits (13, 17, 18, 23) via which all the multiport valves present are connected to one another, characterized in that the apparatus for automated sampling comprises a pressure regulation unit with which the samples can be brought to ambient pressure, wherein the pressure regulation unit comprises a further multiport valve having a restriction capillary and wherein the further multiport valve is disposed between the first multiport valve and the third multiport valve.