Instruction Manual

8.7 Standard addition technique
797 VA Computrace – Software
245
Start determination.
8.7 Standard addition technique
Use manual standard addition without solution exchange
In the manual standard addition without solution exchange, a
known amount of the analyte is added once or several times to the
sample using a pipette. Proceed as follows:
1. Click on or MAIN WINDOW / Mode / Determination.
2. Click on or MAIN WINDOW / Window / Working method
specification
to open the WORKING METHOD SPECIFICATIONS
window.
3. Load the desired method into the WORKING METHOD SPECIFI-
CATIONS
window (see How to Load a method, section 8.4).
4. Select Standard addition in the Calibration field of the WORK-
ING METHOD SPECIFICATIONS
window.
5. Select
Manual in the Addition field of the WORKING METHOD
SPECIFICATIONS
window.
6. Select Batch in the Technique field of the WORKING METHOD
SPECIFICATIONS
window.
7. Click to open the EDIT WORKING METHOD PA-
RAMETERS
window.
8. Select the Determination tab (see section 5.2) and enter Sample
identifier
, Sample amount (not with the modes CVS and CPVS),
Cell volume, and the number of standard additions in the No. of
additions
field. (If you work with the CVS or CPVS mode, see
section 6.2
Calibration techniques with CVS and CPVS for a de-
scription of the parameters on the Determination tab).
9. Select the Substances tab (see section 5.2) and make sure that
for each substance entered in the table the number of the sin-