Functions and setup of the contrAA 600
34
Edition 01/2014
contrAA 600
5.5
Supplementary accessories
5.5.1
Mercury/hydride systems for HydrEA technique
The mercury/hydride systems range includes both batch systems for users with a low sam-
ple volume as well as devices for which the continuous feeding from an autosampler is fully
automated.
HS 55 modular:
batch system with electrically heated cell unit with or without "Hg Plus"
module for Hg detection.
The reduction agent solution is metered by a 1-channel hose pump.
HS 60 modular:
Hg/hydride system for flow injection operation with electrically heated cell
unit with or without "Hg plus" module for Hg detection.
More information on the Hg/hydride systems can be found in the relevant accessory manu-
als.
5.5.2
Autosampler AS-F and AS-FD for HydrEA technique
The following autosamplers can be used for the HydrEA technique with the contrAA 600:
the autosampler AS-F
the autosampler AS-FD with additional dilution function.
The autosamplers use sample trays with the same diameter. The following sample tray types
are available:
139 positions
Sample tray with 129 sample positions for 15 mL Sarstedt cups on the
outer track and 10 sample positions for 50 mL Sarstedt cups on the inner
track
54 positions
Sample tray with 54 positions for 50 mL Sarstedt cups
The sample trays should be selected according to the requirements of the sample analysis:
Available sample volume
Type of signal evaluation
The software controlled autosampler arm reaches all the positions intended for sample-
taking. The dipping depth into the sample and the special cups is preset, however, it can be
adjusted via the control software.
The contrAA 600 supplies the autosamplers with operational voltage. Tray and autosampler
arm are driven by stepping motors. The tray is rotated. The autosampler arm is rotatable and
can be lowered by 120 mm.
On the top of the autosampler AS-F there is a wash cup with overflow next to the sample
tray. In the autosampler AS-FD the wash cup is located in a plastic block together with a
mixing cup. A diaphragm pump delivers the washing liquid from the supply bottle into the
wash cup – this action cleans the dipped canula by washing it inside and out. Excess wash-
ing liquid flows through the overflow into the waste receptacle, which is under the table
during the wash cycle.
