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Appendix 4: Technical specifications
Potentiometric Methods
End point titration:
Inflection point titration:
Titration stops at:
Titrant addition techniques:
Method reprocessing for curve and results: automatic or manual.
pH electrode calibration:
pH with temperature-compensated reading: probe, entered or fixed at 25°C.
Direct pH/mV measurements with recording on stable reading.
Back titration: manual or automatic.
Reagent addition: up to 3 simultaneous or consecutive reagent additions.
Sequencing of up to 10 methods including electrode and reagent calibrations.
Coupling of 2 to 6 methods in one beaker, including direct ISE and EC measurements.
Conductivity Methods (EC)
Direct conductivity measurements with recording on stable reading.
Conductivity with temperature-corrected display: none, natural water (ISO 7888), linear.
Conductivity cell cable resistance compensation.
Conductivity cell calibration: manual cell constant entry or automatic determination
using 1, 0.1, 0.01 Demal KCl standards, NaCl 0.05%, NaCl 25 µS/cm at 25°C low
conductivity standard, 0.1, 0.01 and 0.001 M KCl standard.
Ion Selective Methods (ISE)
ISE measurements using standard additions or direct measurements with recording on
stable reading.
Additions or calibration with up to 9 points.
Curves fitted using non-linear regression with C
to IUPAC.
Automatic standard additions: volumes programmed or automatically determined.
Curve plotting:
GRAN plot vs. Volume for standard additions, mV = f(pC) for ISE calibration.
TitraLab 870 Reference Manual
1 to 4 pre-set.
Auto determination of 1 to 8 inflection points with
programmable IP acceptation windows.
IP detection using 1st and 2nd derivative curve.
pH, mV, ml, IP number.
incremental dynamic, incremental monotonic and
continuous dynamic.
up to 5 points using IUPAC standards or 4-7-10
Series buffers with error recognition on buffer used.
detection limit determination according
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