This Information Applies To: Agilent GTA 120 and Zeeman Atomic Absorption instruments
How to replace and align graphite tubes. Replacement of graphite tubes are a routine maintenance item for all Graphite Furnace instruments.
Caution: Ensure that both the spectrometer and GTA control unit are switched off and the instrument is unplugged before proceeding.
Steps to Follow
When your lamps, GTA/Furnace, and sampler are set up, you can insert a graphite tube and start your analytical run. Graphite tubes should be changed as part of routine maintenance and sample preparation.
To remove a used graphite tube:
Warning: Zeeman instruments use magnets. To ensure safety and avoid interference with heart pacemakers or other electronic health devices, stay at least 300 mm from the workhead magnet. To avoid disruption of magnetic storage devices, keep items at least 300 mm from the workhead magnet.
To Insert a graphite tube:
Tips: Alignment of PSD is required after replacement of graphite tubes. See Alignment of Sample Probe on the Agilent PSD 120.