Metrohm 746 VA Trace Analyzer - Manual (Page 365)

5.7 Program instructions
746 VA Trace Analyzer / 747 VA Stand
5-214
Examples Lead determination using a calibration curve with the 695 Autosampler
(basic structure only):
Method Cal695-2.mth OPERATION SEQUENCE
Title Calibration curve with 695 and CSOLN/F
================================================================================
Instructions t/s Main parameters Auxiliary parameters
––––––––––––– ––––– ––––––––––––––––––––––––– –––––––––––––––––––––––––
1 D SMPL/F V.fraction mL V.total L
2 C (CAL
3 C CSOLN/F solution added into FEED
4 F>A addition FEED -> AUX V.add 8.000 mL
5 DOS>A Soln.name Sol-1 V.add 2.000 mL
6 VMIX Cycles 1 V.mix 9.000 mL
Rack pos. SA
7 A>M addition AUX -> MEAS V.add 5.000 mL
8 DOS>M Soln.name Sol-2 V.add 15.000 mL
9 (REP
10 SEGMENT Segm.name DPASV
11 REP)2
12 ØMEAS U.standby mV
13 RINSE Cycles 2 V.rinse mL
14 C CAL)3
15 END . .
Method Cal695-2 SUBSTANCES
Pb - DPASV
================================================================================
Calibration 1993-11-12 09:39 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. * mL 2 Pb-10 10 ug/L
3 Pb-25 25 ug/L
In the program run mode calibration , 4 calibration solutions are
measured in succession and used to determine the calibration curve.
The volume of the calibration solutions is not specified (
* ) as only a
defined part (8 mL) is transferred to the auxiliary vessel. Here, an
auxiliary solution is added and mixed. 5 mL of this solution are then
transferred to the measuring vessel where 15 mL of a second auxiliary
solution are added. Following the measurement, the measuring vessel is
rinsed twice. In the
determination mode the instructions marked with D
are executed instead of those marked with C , otherwise the determina-
tion runs in exactly the same manner.
see also (CAL, CAL)n, CSOLN/M, CSOLN>M, F>A, F>M,
Calibration curve (section 5.6.3 and section 6.9.5),
Internal standard (section 5.6.3 and section 6.9.6)