Metrohm 794 Basic Titrino - Manual (Page 170)

6.3. User methods
794 Basic Titrino
166
6.3.2 "Titer_pH"
The titer is calculated as a factor without di-
mension out of 5 determinations and stored
as common variable C31. It can therefore be
used directly by subsequent methods.
Electrode:
6.0232.100 combined glass pH electrode, at
measuring input 1.
Titrant:
c(NaOH) = 0.1 mol/L (free of carbonate)
Sample:
Weigh in app. 300 mg potassium hydrogen
phtalate (PHP). Dried 2 h at 105 °C, diluted in
40 mL dist. Water (free of carbonate).
Reference:
METROHM Application Bulletin Nr. 206:
– Result (Titer) as a digit without dimension
– Sample size PHP in g
– Theoretical consumption for 1 mol PHP
– Molar mass PHP
'pa
794 Titrino 01102 794.0010
date 2002-01-03 time 09:34 0
DET pH Titer_pH
parameters
>titration parameters
meas.pt.density 4
min.incr. 10.0 µl
titr.rate max. ml/min
signal drift 50 mV/min
equilibr.time 26 s
start V: OFF
pause 0 s
meas.input: 1
temperature 25.0 °C
>stop conditions
stop V: abs.
stop V 20 ml
stop pH OFF
stop EP 9
filling rate max. ml/min
>statistics
status: ON
mean n= 5
res.tab: original
>evaluation
EPC 5
EP recognition: all
fix EP1 at pH OFF
pK/HNP: OFF
>preselections
req.ident: OFF
req.smpl size: value
activate pulse: OFF
------------
'fm
794 Titrino 01102 794.0010
date 2002-01-03 time 09:34 0
DET pH Titer_pH
>calculations
Titer=C00*C01/C02/EP1;4;
C00= 1.0
C01= 10000
C02= 204.23
------------