A communication system , the communication system comprising a cloud server , a first server , at least one second server , and at least one third server ; wherein the first server further has a first communication interface configured to provide reference spectral information referring to at least one reference sample and reference analytical data to the cloud server ; wherein each second server has a second communication interface configured to provide spectral information related to at least one substance to the cloud server ; wherein the cloud server is configured to - generate a calibration model by using the reference spectral information referring to the at least one reference sample and the reference analytical data provided by the first server , wherein the calibration model comprises at least one parameter; - apply the calibration model to the spectral information related to the at least one substance provided by the second server , whereby at least one value for the at least one parameter is extracted; - provide the at least one value for the at least one parameter to the first server via the first communication interface ; wherein the first server is further configured to determine treatment data by using the at least one value for the at least one parameter provided by the cloud server , wherein the treatment data comprise at least one piece of data which is related to a proposed treatment of the at least one substance ; wherein the first server further has at least one third communication interface , wherein each third communication interface is configured to provide the treatment data to the at least one third server . wherein the first server further has a first communication interface configured to provide reference spectral information referring to at least one reference sample and reference analytical data to the cloud server ; wherein each second server has a second communication interface configured to provide spectral information related to at least one substance to the cloud server ; wherein the cloud server is configured to - generate a calibration model by using the reference spectral information referring to the at least one reference sample and the reference analytical data provided by the first server , wherein the calibration model comprises at least one parameter; - apply the calibration model to the spectral information related to the at least one substance provided by the second server , whereby at least one value for the at least one parameter is extracted; - provide the at least one value for the at least one parameter to the first server via the first communication interface ; - generate a calibration model by using the reference spectral information referring to the at least one reference sample and the reference analytical data provided by the first server , wherein the calibration model comprises at least one parameter; - apply the calibration model to the spectral information related to the at least one substance provided by the second server , whereby at least one value for the at least one parameter is extracted; - provide the at least one value for the at least one parameter to the first server via the first communication interface ; wherein the first server is further configured to determine treatment data by using the at least one value for the at least one parameter provided by the cloud server , wherein the treatment data comprise at least one piece of data which is related to a proposed treatment of the at least one substance ; wherein the first server further has at least one third communication interface , wherein each third communication interface is configured to provide the treatment data to the at least one third server . <EOS>