Metrohm 746 VA Trace Analyzer - Manual (Page 369)

5.7 Program instructions
746 VA Trace Analyzer / 747 VA Stand
5-218
• For permanent storage of the coefficients of the calibration curve
determined in the recording of the calibration solutions, the method
must then be copied from the working storage to the method memory
(this occurs automatically with
Auto.batch = on ).
Examples Lead determination using a calibration curve with the CSOLN>M
instruction (basic structure only):
Method Cal-3 .mth OPERATION SEQUENCE
Title Calibration curve with CSOLN>M
================================================================================
Instructions t/s Main parameters Auxiliary parameters
––––––––––––– ––––– ––––––––––––––––––––––––– –––––––––––––––––––––––––
1 D SMPL>M V.fraction mL V.total L
2 C (CAL
3 C CSOLN>M addition into MEAS
4 (REP
5 SEGMENT Segm.name DPASV
6 REP)2
7 ØMEAS U.standby mV
8 RINSE Cycles 2 V.rinse mL
9 C CAL)3
10 END .
Method Cal-3 SUBSTANCES
Pb - DPASV
================================================================================
Calibration 1993-11-16 09:42 Coefficients
–––––––––––––––––––––––––––––– –––––––––––––––––––––––––
Technique cal.crv. Y.offset
Curve type 0/linear Slope 0.0006743
Temperature 20.0 °C Nonlin.
Mean dev. 3.043e–10
Range min 2 ug/L # CSoln.name Mass conc.
Range max 30 ug/L –––––––––––––––––––––––––
M.conc./cm 5 ug/L 0 Pb-2.5 2.5 ug/L
1 Pb-5 5 ug/L
V0.CSoln. 10.000 mL 2 Pb-10 10 ug/L
3 Pb-25 25 ug/L
In the program run mode calibration , 4 calibration solutions each of 10
mL are measured in succession and used to determine the calibration
curve. In work with the manual Stand, the prompt for addition
CSOLN
"CSoln.name" "Mass conc." > M appears with every calibration solution.
Following the measurement the prompt Change measuring vessel to
change the measuring vessel appears. Lead is then determined using
the measured calibration curve.
If this program is used with the 695 Autosampler, the 4 calibration
solutions must be entered on the "SAMPLES" page. They are then
fetched in turn from the positions on the sample rack specified here and
transferred to the measuring vessel. Following every measurement, the
measuring vessel is rinsed twice. Lead is then determined in the
determination mode using the measured calibration curve.
see also (CAL, CAL)n, CSOLN/F, CSOLN/M, RINSE,
Calibration curve (section 5.6.3 and section 6.9.5),
Internal standard (section 5.6.3 and section 6.9.6)