Metrohm 838 Advanced Sample Processor Manual - Manual (Page 96)

3.8 Standard methods
88 Metrohm 838 Advanced Sample Processor, Appendix
3.8.4 Method "VA"
VA = Voltammetric trace analysis
Application
Voltammetric trace analysis
System setup
See 8.838.1303 Installation Instructions, Section 3.6 or 8.797.1013
Hardware Manual of the 797 VA Computrace, Section 2.11.
Run sequences for the 838 Advanced Sample Processor
838 Advanced S.Proc. 00030 5.838.0010
parameters
method VA
number of samples: rack
>start sequence
1 CTL:Rm: INIT
2 MOVE 1 : sample
3 CTL:Rm: *************1
4 CTL:Rm: *************0
>sample sequence
1 SCN:Rm : *****1**
2 MOVE 1 : sample
3 LIFT: 1 : work mm
4 PERISTALT: 300 s 10
5 CTL:Rm: *************1
6 CTL:Rm: *************0
7 MOVE 1 : +28
8 LIFT: 1 : work mm
9 PERISTALT: 5 s 10
10 SCN:Rm : *****1**
11 PERISTALT: 300 s 10
12 CTL:Rm: *************1
13 CTL:Rm: *************0
>final sequence
>changer settings
>stirring rates
>dosing unit def.
>timeout settings
>manual stop
- report header with instrument ID and program version
- method name
- number of samples (e. g. entire rack)
- initialize all Remote lines
- approach first sample
- remote start of the 797 VA Computrace
- wait for advance signal of the 797 VA Computrace
- approach sample
- run lift and needle to work position
- transfer sample with peristaltic pump
- set Remote line: sample transfer ready
- approach rinsing vessel
- run needle to work position
- aspirate rinsing solution
- wait for advance signal of the 797 VA Computrace
- rinse needle and transfer tubing
- set Remote line: needle cleaning ready
----- miscellaneous settings -----
6.2041.450 sample rack
50 mL sample vessels can be placed on the two outer rings (11 mL
sample vessels on the two inner rings).
Arrangement: Place the samples solutions on the outer and the rinsing
solutions on the inner of the two rings.
Example for an arrangement with 11 samples:
⇒ With 50 mL sample vessels: first sample on position 1, first rinsing
solution on position 29: