Metrohm 894 Professional CVS semiautomated - Manual (Page 5)

Application Bulletin 401/1 e
Installation instruction for 894 Professional CVS semiautomated
Dosing rate port 1 Maximum mL/L
Dosing rate port 2 Maximum mL/L
Dosing rate Fill port Maximum mL/L
Dosing rate special port Maximum mL/L
Tubing parameters
Port Length Diameter
Dosing port 1 Port 1 138 cm 2 mm
Dosing port 2 Port 3 0 cm 2 mm
Fill port Port 2 25 cm 2 mm
Special port Port 4 0 cm 2 mm
Valve disk
Rotating direction automatic
3.3.2. Dosing unit at 800 Dosino (2), 800 Dosino (3) and
800 Dosino (4)
Dosing Unit name as used in the viva method templates.
800 Dosino (MSB 2) 894/D2 2mL Brightener
800 Dosino (MSB 3) 894/D3 2mL Suppressor
800 Dosino (MSB 4) 894/D4 2mL Std or sample
Parameters for preparation
Dosing port Prep/empty Dosing port 2
Dosing rate port 1 2.0 mL/L
Dosing rate port 2 Maximum mL/L
Dosing rate Fill port Maximum mL/L
Dosing rate special port Maximum mL/L
Tubing parameters
Port Length Diameter
Dosing port 1 Port 1 80 cm 0.3 mm
Dosing port 2 Port 3 0 cm 2 mm
Fill port Port 2 55 cm 2 mm
Special port Port 4 0 cm 2 mm
Valve disk
Rotating direction automatic
3.4. Solutions
Solutions that should automatically be dosed have to be
defined in the viva «Configuration» and need to be
assigned to the Dosing Unit which is used for the dosing.
The following table shows the solution names and assigned
Dosing Units as used in the viva method templates.
Solution name Dosing Unit
VMS 894/D1 50mL VMS
Brightener concentrate 894/D2 2mL Brightener
Suppressor concentrate 894/D3 2mL Suppressor
Std or sample 894/D4 2mL Std or sample
S OLUTION TYPE for «VMS» and «Suppressor concentrate»
has to be A UXILIARY SOLUTION , for «Brightener concentrate»
and «Std or sample» it is S TANDARD SOLUTION .
For a step by step description please see the Tutorial
chapter «5.1.4 Define solutions».
4. viva «Method»
viva software includes three method templates for CVS
analysis with a semiautomated system.
•
Brightener determination (CVS, MLAT), semiautomated
•
Conditioning (Cu VMS), semiautomated
•
Suppressor determination (CVS, DT), semiautomated
The templates already establish the basic sequences for the
different applications and the use of 800 Dosinos for
automatic dosing as well as the calculation of the result.
However certain commands and settings have to be
adapted to the used hardware and the requirements of the
specific application.
For a step by step description please see the Tutorial
chapter «5.2 Methods for the semiautomated
determination».
The following commands have to be adapted:
4.1. Method run
4.1.1. Measuring commands
Such as
•
Assign the 894 Professional CVS instrument to be used
on the tab «General/Hardware».
•
Adapt the measuring parameters on the tabs «Pre-
treatment», «Sweep», «Post-treatment» and
«Potentiostat» according to the requirements of the
application. These parameters can be found in separate
application documentation.
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