Metrohm 838 Advanced Sample Processor Manual - Manual (Page 95)

3.8 Standard methods
Metrohm 838 Advanced Sample Processor, Appendix 87
mended to save the modified methods separately under specific
method names.
Only similar samples which require the same amount of auxiliary solu-
tions can be processed in one sample series.
Samples
The method parameter 'Number of samples' has to correspond exactly
to the real number of samples. Place a vessel with rinsing solution at
the end of the series on the rack.
6.2041.450 sample rack
Samples and auxiliary solutions are placed on the rack. It is recom-
mended to use the two inner rings with 11 ml sample vessels. How fre-
quently the calibration curve needs to be recorded (with Calibration
technique "DT Record calibration curve") depends on the chemistry of
the bath.
Note: Place a vessel with water at the end of the series on the rack.
Arrangement: At the first position a Suppressor standard solution to re-
cord the calibration curve. Then samples, and, when a recalibration is
necessary, another Suppressor standard solution. At the end of the se-
ries place a vessel with water.
Example for a sample rack with 14 samples, 2 Suppressor standard so-
lutions and one rinsing solution:
Suppressor standard
Rinsing solution
not used
Sample
1 2
3
28
27
29 30
31
56
55
57 58
59
84
83
85 86
87
112
111
Before each start, define the position of the first sample vessel. Press
the key of the 838 keypad and enter the rack position.
Find more information in the 8.797.8011 Software Manual of the 797 VA
Computrace, see section 8.6.