Metrohm 900 Touch Control Manual User Manual Page 28

  • Download
  • Add to my manuals
  • Print
  • Page
    / 541
  • Table of contents
  • TROUBLESHOOTING
  • BOOKMARKS
  • Rated. / 5. Based on customer reviews
Page view 27
5.3 Endpoint titration (SET)
■■■■■■■■■■■■■■■■■■■■■■
12
■■■■■■■■
900 Touch Control
5.3 Endpoint titration (SET)
Endpoint titration is a titration mode for rapid routine determinations to a
preset endpoint (e.g. titrations in accordance with special norms) and
titrations for which reagent overflow must be avoided. The titration termi-
nation at the endpoint takes place either drift-controlled or after a waiting
period. The volume dosed until the endpoint is used for calculating the
content of the sample.
t/s
EP
Continuous
dosing
Initial
dosing
V/mL
V/mL
U/mV
Control range
Figure 5 Reagent dosing for SET
5.4 Water determination according to Karl Fischer (KFT)
Karl Fischer Titration is a method for volumetric water determination. Con-
ditioning is carried out automatically both before and after the actual titra-
tion. The reagent dosing is controlled in such a way that a predefined
endpoint is reached as quickly and as accurately as possible. The volume
steps and the rate of reagent dosing are regulated by the difference
between the current measured value and the predefined endpoint. This
means that titration is performed more slowly in the control range and
that smaller volumes are added. The titration is stopped at the endpoint
either drift-controlled or after a waiting time. The volume dosed until the
endpoint is used to calculate the water content of the sample.
Page view 27
1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 540 541

Comments to this Manuals

No comments