KF Titer Determination with Sodium Tartrat by Potentiometric Method

KF Titer Determination with Sodium Tartrate by Potentiometric Method

Equipment
Potentiometer = 751 GPD Titrino / Titroprocessor
Electrodes = 6.0338.100 double Pt electrode; input Pol

Reagents
HYDRANAL® Titrant 5; D0

Sample
20 -30 mL HYDRANAL® Solvent, conditioned to complete dryness app. 200 mg di-Sodium tartrate dihydrate
Water 15.66 ±0.05%

Remarks
Calculations:

Titer=C00/EP1*C01;4;mg/ml

Titer = titer of HYDRANAL® Titrant 5
C01 = water content * 10 (156,6)

Answer

Titer= 0.2294 / 7.508 x 156.6 = 4.7848 mg/mL

EP1 = 7.508 mL
C00 = 0.2294 g

Common variables
C39 = MN1
Mean from 5 determinations.
Reweigh the sodium tartrate in a weighing boat.
Adjust the calculation value C01 according to the unit of your sample
weight:

C00 in g C01=156.6
C00 in mg C01=0.1566
For automatic curve output add in , >report “curve“.

Literature
Water determination by Karl Fisher titration, G. Wieland, GIT Verlag,
Darmstadt (Germany)
HYDRANAL®, practical course, Water reagents according to Eugen
Scholz, Riedel de Haën, Seelze (Germany)
Metrohm Application Bulletin No. 77: KF water determination

Method documentation

'pa
751 GPD Titrino 15215 751.0010
KFT Ipol TarTiter
parameters
>control parameters
EP at U 250 mV
dynamics 100 mV
max.rate max. ml/min
min.volume incr. min. ml
stop crit: drift
stop drift 20 ml/min
>titration parameters
titr.direction: -
pause 1 0 s
start V: OFF
pause 2 0 s
extr.time 0 s
dos.element: internal D0
I(pol) 50 mA
electrode test: OFF
temperature 25.0 °C
time interval 2 s
>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: ON
display drift: ON
drift corr: OFF
req.ident: OFF
req.smpl size: value
activate pulse: OFF
------------
'fm
751 GPD Titrino 15215 751.0010
KFT Ipol TarTiter
>calculations

Titer=C00/EP1*C01;4;mg/ml

C00= 0.2294
C01= 156.6
------------
'fr
751 GPD Titrino 15215 751.0010
KFT Ipol TarTiter

smpl size 0.2294 g
EP1 7.508 ml
Titer 4.7848 mg/ml
mean( 5) +/-s s/%
Titer 4.7893 0.00506 mg/ml 0.11
============
'cu
751 GPD Titrino 15215 751.0010
KFT IpolTarTiter
20.0 s/div dV=2.0 ml/div
============
'st
751 GPD Titrino 15215 751.0010
statistics
## Titer
1 4.7936
2 4.7939
3 4.7830
4 4.7910
5 4.7848
mean( 5) +/-s s/%
Titer 4.7893 0.00506 mg/ml 0.11