An automated heating system for heating one or more samples contained in a sample holder (10, 120, 210 430, 456, 520, 536, 604, 670), comprising: a heating chamber (202, 232, 402, 605) having at least one opening and adapted to receive the sample holder (10, 120, 210 430, 456, 520, 536, 604, 670); a conveyor (206, 238, 360, 403) adapted to receive and transport the sample holder (10, 120, 210 430, 456, 520, 536, 604, 670) into and out of the heating chamber (202, 232, 402, 605); at least one microwave barrier movable between an open position to allow access to the heating chamber (202, 232, 402, 605) and a closed position to prevent microwaves from leaking out of the heating chamber (202, 232, 402, 605) when the at least one microwave generator is activated; characterised in that it further comprises: at least one microwave generator (204, 508, 554, 804) in microwave transfer communication with the heating chamber (202, 232, 402, 605) for propagating thereinto microwaves to perform digestion of the one or more samples by at least one chemical decomposition agent; a control unit (208, 408, 514) configured to control a temperature of each one of the one or more samples contained in the sample holder (10, 120, 210 430, 456, 520, 536, 604, 670) independently from remaining ones to the one or more samples by controlling the at least one microwave generator (204, 508, 554, 804) and the conveyor (206, 238, 360, 403) in an automated manner. a heating chamber (202, 232, 402, 605) having at least one opening and adapted to receive the sample holder (10, 120, 210 430, 456, 520, 536, 604, 670); a conveyor (206, 238, 360, 403) adapted to receive and transport the sample holder (10, 120, 210 430, 456, 520, 536, 604, 670) into and out of the heating chamber (202, 232, 402, 605); at least one microwave barrier movable between an open position to allow access to the heating chamber (202, 232, 402, 605) and a closed position to prevent microwaves from leaking out of the heating chamber (202, 232, 402, 605) when the at least one microwave generator is activated; characterised in that it further comprises: at least one microwave generator (204, 508, 554, 804) in microwave transfer communication with the heating chamber (202, 232, 402, 605) for propagating thereinto microwaves to perform digestion of the one or more samples by at least one chemical decomposition agent; a control unit (208, 408, 514) configured to control a temperature of each one of the one or more samples contained in the sample holder (10, 120, 210 430, 456, 520, 536, 604, 670) independently from remaining ones to the one or more samples by controlling the at least one microwave generator (204, 508, 554, 804) and the conveyor (206, 238, 360, 403) in an automated manner. at least one microwave generator (204, 508, 554, 804) in microwave transfer communication with the heating chamber (202, 232, 402, 605) for propagating thereinto microwaves to perform digestion of the one or more samples by at least one chemical decomposition agent; a control unit (208, 408, 514) configured to control a temperature of each one of the one or more samples contained in the sample holder (10, 120, 210 430, 456, 520, 536, 604, 670) independently from remaining ones to the one or more samples by controlling the at least one microwave generator (204, 508, 554, 804) and the conveyor (206, 238, 360, 403) in an automated manner.