Metrohm 719 S Titrino - Manual (Page 138)

6.3. User methods
719 S Titrino
134
6.3.2 "Tit.HCl"
Titer determination of HCl using TRIS.
The titer is calculated as a factor without di-
mension out of 5 determinations and stored
as common variable C36. It can therefore be
used directly by subsequent methods.
Electrode:
6.0232.100 combined glass pH electrode, at
measuring input 1.
Titrant:
c(HCl) = 0.1 mol/L
Sample:
Weigh in Tris(hydroxymethyl)aminomethane
(TRIS) dried 2 h at 105 °C.
Sample size according to the buret volume.
Dilute in 40 mL dist. water.
Reference:
METROHM Application Bulletin Nr. 206:
– Result (Titer) as a digit without dimension
– Sample size TRIS in g
– Theoretical consumption for 1 mol TRIS
– Molar mass of TRIS
C36 is the common variable for the titer
c(HCl) = 0.1 mol/L
'pa
719 S Titrino 18200 719.0021
date 2002-03-13 time 12:24 0
SET pH Tit.HCl
parameters
>SET1
EP at pH 5.10
dynamics 3
max.rate 5 ml/min
min.rate 0.5 µl/min
stop crit: drift
stop drift 20 µl/min
>SET2
EP at pH OFF
>titration parameters
titr.direction: auto
pause 1 0 s
start V: rel.
factor 70
dos.rate max. ml/min
pause 2 5 s
extr.time 0 s
meas.input: 1
temperature 25.0 °C
>stop conditions
stop V: abs.
stop V 99.99 ml
filling rate max. ml/min
>statistics
status: ON
mean n= 5
res.tab: original
>preselections
conditioning: OFF
req.ident: OFF
req.smpl size: value
activate pulse: OFF
------------
'fm
719 S Titrino 18200 719.0021
date 2002-03-13 time 12:24 0
SET pH Tit.HCl
>calculations
Titer=C00*C01/C02/EP1;4;
C00= 1.0
C01= 10000
C02= 121.14
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'de
719 S Titrino 18200 719.0021
date 2002-03-13 time 12:24
SET pH Tit.HCl
def
>formula
Titer=C00*C01/C02/EP1
RS1 text Titer
RS1 decimal places 4
RS1 unit:
>common variables
C36=MN1
>report
>mean
MN1=RS1
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