Metrohm 746 VA Trace Analyzer - Manual (Page 6)

Table of contents
746 VA Trace Analyzer / 747 VA Stand
V
6 Data processing and evaluation
.............................
6-1
6.1 Operational chart for determinations .................................. 6-1
6.2 Preparations before start of a determination .................. 6-2
6.2.1 Method definition .........................................................................6-2
6.2.2 Definition of the sample size........................................................6-4
6.2.3 Method-independent settings......................................................6-5
6.3 Data acquisition .............................................................................. 6-6
6.4 Spike elimination and background compensation ....... 6-7
6.5 Smoothing and differentiation ................................................ 6-8
6.6 Recognition of peaks and waves .......................................... 6-9
6.7 Baseline calculation ................................................................... 6-11
6.7.1 General.......................................................................................6-11
6.7.2 Baselines for waves ...................................................................6-13
6.7.3 Baselines for peaks....................................................................6-14
6.7.4 Baselines for AC2 curves...........................................................6-17
6.7.5 Baselines for PSA curves...........................................................6-18
6.8 Height/area calculation ............................................................. 6-19
6.9 Content calculation ..................................................................... 6-20
6.9.1 General.......................................................................................6-20
6.9.2 Dilution calculation.....................................................................6-21
6.9.3 Result calculation from calibration curves
and error calculation ..................................................................6-22
6.9.4 Standard addition.......................................................................6-24
6.9.5 Calibration curve ........................................................................6-27
6.9.6 Internal standard ........................................................................6-31
6.10 Formula calculation .................................................................... 6-36