Combination of a device for analysing samples, particularly of metabolic gas generated by biological samples, and at least one assembly, each assembly comprising: - a container for a biological sample, and - a closing element connected to the container, said closing element comprising: o at least one penetrable element for injecting a sample via the closing element into a container connected to the closing element, and o a plurality of ventilating channels debouching into at least one bacterial filter, which bacterial filter is substantially impermeable to bacteria and is at least permeable to at least one metabolic gas formed in the biological sample, which ventilating channels are configured for connection to the device for analysing metabolic gas, wherein the ventilating channels are closed in unloaded state by a closing body of the closing element, and wherein opening of the ventilating channels takes place by exerting a pressure on at least a part of the closing element; said device comprising: - at least one support structure for supporting at least one assembly of a container provided with a biological sample and a closing element connected to the container, - at least one top structure connected to the support structure, wherein the top structure comprises at least one analysis compartment, which analysis compartment is configured for substantially medium-tight connection to at least one ventilating channel of the closing element of the assembly, and wherein the analysis compartment comprises at least one chemical trace detector (18, 31) for detecting at least one metabolic gas or composition of gases formed in the biological sample, wherein the top structure, in particular the analysis compartment, is configured to load the closing element of the assembly such that the ventilating channel will be opened as a result and displacement of metabolic gas in the direction of the analysis compartment can take place, and - a pump configured to apply a pressure difference over the at least one bacterial filter, such that an underpressure is applied outside the assembly of closing element and container whereby accelerated diffusion is forced. - a container for a biological sample, and - a closing element connected to the container, said closing element comprising: o at least one penetrable element for injecting a sample via the closing element into a container connected to the closing element, and o a plurality of ventilating channels debouching into at least one bacterial filter, which bacterial filter is substantially impermeable to bacteria and is at least permeable to at least one metabolic gas formed in the biological sample, which ventilating channels are configured for connection to the device for analysing metabolic gas, wherein the ventilating channels are closed in unloaded state by a closing body of the closing element, and wherein opening of the ventilating channels takes place by exerting a pressure on at least a part of the closing element; o at least one penetrable element for injecting a sample via the closing element into a container connected to the closing element, and o a plurality of ventilating channels debouching into at least one bacterial filter, which bacterial filter is substantially impermeable to bacteria and is at least permeable to at least one metabolic gas formed in the biological sample, which ventilating channels are configured for connection to the device for analysing metabolic gas, wherein the ventilating channels are closed in unloaded state by a closing body of the closing element, and wherein opening of the ventilating channels takes place by exerting a pressure on at least a part of the closing element; - at least one support structure for supporting at least one assembly of a container provided with a biological sample and a closing element connected to the container, - at least one top structure connected to the support structure, wherein the top structure comprises at least one analysis compartment, which analysis compartment is configured for substantially medium-tight connection to at least one ventilating channel of the closing element of the assembly, and wherein the analysis compartment comprises at least one chemical trace detector (18, 31) for detecting at least one metabolic gas or composition of gases formed in the biological sample, wherein the top structure, in particular the analysis compartment, is configured to load the closing element of the assembly such that the ventilating channel will be opened as a result and displacement of metabolic gas in the direction of the analysis compartment can take place, and - a pump configured to apply a pressure difference over the at least one bacterial filter, such that an underpressure is applied outside the assembly of closing element and container whereby accelerated diffusion is forced.