Metrohm 746 VA Trace Analyzer User Manual
Page 121
4 Introduction to the operation
746 VA Trace Analyzer / 747 VA Stand
4-36
11 Measurement of the 4
th
calibration solution
•
Repeat steps 5
…
8 with 10 mL of calibration solution
Pb-4
with a
mass concentration of 20
µµg/L. You obtain three single measurements
with the VR numbers
30
,
31
and
32
.
•
On completion of the last measurement, the results for the coefficients of
the calibration curve are calculated and entered in the dialog page
"SUBSTANCES/Calibration" together with the date and time of the cali-
bration.
•
The program is now at an end. The status display in the header of the
dialog page "MONITORING" switches back to
* READY *
, the instrument
is now ready for a new determination.
12 Printout of reports and curves
•
On completion of the program, the full report of the calibration is put out
on the printer.
================== METROHM 746 VA TRACE ANALYZER (5.746.0101) ==================
Determ. : 12151548 User: Date: 1996-12-15
Modified : no Run : 2 Time: 15:48:08
Sample table: -
--------------------------------------------------------------------------------
Pos. Ident.1/S1 Ident.2/S2 Ident.3/S3 Method.call Sample size/S0
10 mL
--------------------------------------------------------------------------------
Method : CALCRV
Title : Pb determination with calibration curve
Remark1 :
Remark2 :
--------------------------------------------------------------------------------
Substance : Pb Comments
Mass conc.: - Mass : - ––––––––––––––––––
MC.dev. : - Add.mass : -
Cal.dev. : - V0.sample: -
VR U/mV I/nA I.mean Std.dev. I.delta Comments
––– ––––– –––––– –––––– ––––––– ––––––– ––––––––––––––––––
00 -408 3.351 3.358 0.0853
01 -409 3.447
02 -409 3.277
10 -408 7.286 7.190 0.2184 3.832
11 -409 7.344
12 -410 6.940
20 -408 14.42 14.26 0.1894 7.072
21 -409 14.05
22 -409 14.31
30 -408 25.69 25.83 0.3866 11.57
31 -409 25.53
32 -409 26.26
Substance Techn. Y.reg/offset Slope Nonlin. Mean deviat.
––––––––– –––––––– –––––––––––– –––––––––– –––––––––– ––––––––––––
Pb cal.crv. 5.489e-10 0.001438 5.933e-10
C# Workg.com.var Remark
–– ––––––––––––– ––––––––––––––––
Final results +/- Res.dev. % Comments
––––––––––––––––––––––––––––––––– ––––––––––––––––– ––––––––––––––––––
Pb = 0.000 g/L 0.000 - var. not found
3
2
1