A radioisotope elution system comprising a radioisotope generator containing a parent radioisotope that decays into a daughter radioisotope, a patient line for infusing a patient with a daughter radioisotope eluate generated by the generator, a pump for pumping an eluant from an eluant reservoir into the generator, a controller, and a user interface, wherein the system has at least mechanism for identifying whether the eluant is a saline solution or not, said mechanism comprises at least one of the following: a. configurations of the controller for providing instructions to a user to enter an information related to an eluant reservoir when said eluant reservoir is installed on the system, said information comprising at least one of a bar code number, a national drug code, NDC, a drug identification number, DIN, or the nature of the eluant; and b. a liquid parameter detector, wherein the liquid parameter detector is adapted to detect in the eluant at least one of the following parameters: i. pH, ii. refractive index, iii. presence divalent ions or trivalent ions, iv. quantity of divalent ions or trivalent ions, v. conductivity, vi. piezoelectricity, vii. light absorbance, wherein the liquid parameter detection is done by atomic absorption spectroscopy, based on absorption of light of free metallic ions, viii. photoelectricity, wherein the liquid parameter detection is done by flame photometry, atomic emission, wherein the liquid parameter detection is done by atomic emission spectroscopy, AES, ix. optical emission, wherein the liquid parameter detection is done by inductively coupled plasma atomic emission spectroscopy, ICP-AES, also referred to as inductively coupled plasma optical emission spectrometry, ICP-OES, x. atomic mass, wherein the liquid parameter detection is done by inductively coupled plasma mass spectrometry, ICP-MS, xi. EDTA complexing ability, xii. fluorescence, wherein the liquid parameter detection is done by X-ray fluorescence, XRF, xiii. element content, wherein the liquid parameter detection is done by a particle-Induced X-Ray Emission, PIXE, a. configurations of the controller for providing instructions to a user to enter an information related to an eluant reservoir when said eluant reservoir is installed on the system, said information comprising at least one of a bar code number, a national drug code, NDC, a drug identification number, DIN, or the nature of the eluant; and b. a liquid parameter detector, wherein the liquid parameter detector is adapted to detect in the eluant at least one of the following parameters: i. pH, ii. refractive index, iii. presence divalent ions or trivalent ions, iv. quantity of divalent ions or trivalent ions, v. conductivity, vi. piezoelectricity, vii. light absorbance, wherein the liquid parameter detection is done by atomic absorption spectroscopy, based on absorption of light of free metallic ions, viii. photoelectricity, wherein the liquid parameter detection is done by flame photometry, atomic emission, wherein the liquid parameter detection is done by atomic emission spectroscopy, AES, ix. optical emission, wherein the liquid parameter detection is done by inductively coupled plasma atomic emission spectroscopy, ICP-AES, also referred to as inductively coupled plasma optical emission spectrometry, ICP-OES, x. atomic mass, wherein the liquid parameter detection is done by inductively coupled plasma mass spectrometry, ICP-MS, xi. EDTA complexing ability, xii. fluorescence, wherein the liquid parameter detection is done by X-ray fluorescence, XRF, xiii. element content, wherein the liquid parameter detection is done by a particle-Induced X-Ray Emission, PIXE, i. pH, ii. refractive index, iii. presence divalent ions or trivalent ions, iv. quantity of divalent ions or trivalent ions, v. conductivity, vi. piezoelectricity, vii. light absorbance, wherein the liquid parameter detection is done by atomic absorption spectroscopy, based on absorption of light of free metallic ions, viii. photoelectricity, wherein the liquid parameter detection is done by flame photometry, atomic emission, wherein the liquid parameter detection is done by atomic emission spectroscopy, AES, ix. optical emission, wherein the liquid parameter detection is done by inductively coupled plasma atomic emission spectroscopy, ICP-AES, also referred to as inductively coupled plasma optical emission spectrometry, ICP-OES, x. atomic mass, wherein the liquid parameter detection is done by inductively coupled plasma mass spectrometry, ICP-MS, xi. EDTA complexing ability, xii. fluorescence, wherein the liquid parameter detection is done by X-ray fluorescence, XRF, xiii. element content, wherein the liquid parameter detection is done by a particle-Induced X-Ray Emission, PIXE,