Metrohm 784 KFP Titrino - Manual (Page 140)

6.3 User methods
784 KFP Titrino
137
6.3.7 KF titrations with various KF reagents
If you work parallel with different KF reagents, you can use different methods for each KF
reagent. The titer determination is performed with H
2
O or methanol standard as described
for the method "H2OTiter". The factor C01 has to be adapted to the standard used (see
page 130). For each reagent, the titer is assigned to another common variable which is
taken into account in the calculations of the titration method (see table). The titration pa-
rameters are suitable both for water determinations using one-component reagents and
two-component reagents. The KF titations without blank value subtraction are executed
according to the description for the method "KF" (see page 135). For the blank determi-
nation the method "Blank_KF" is used. The mean value of three blank determinations is
assigned to the common variable C38. The KF titations with blank value subtraction are
executed according to the description for the method "KF-Blank " (see page 133). Re-
member that you need to adapt the factors in the formula (see table on page 134).
KF reagents Methods Common
Variables
One-component- or two-
component KF reagent
(5 mg/mL H
2
O)
for medium and high
amounts of water
Titer determination
KF-titration without BV-subtr.
KF-titration with BV-subtraction
Blank determination 5Titer
5Deter
5Deter-B
Blank_KF Titer = C32
Calculation with C32
Calculation with C32
and C38
Blank = C38
One-component- or two-
component KF reagent
(2 mg/mL H
2
O)
for small amounts of water
Titer determination
KF-titration without BV-subtr.
KF-titration with BV-subtraction
Blank determination
2Titer
2Deter
2Deter-B
Blank_KF
Titer = C33
Calculation with C33
Calculation with C33
and C38
Blank = C38
One-component- or two-
component KF reagent
(1 mg/mL H
2
O)
for micro-determination of
water
Titer determination
KF-titration without BV-subtr.
KF-titration with BV-subtraction
Blank determination
1Titer
1Deter
1Deter-B
Blank_KF
Titer = C34
Calculation with C34
Calculation with C34
and C38
Blank = C38
Special KF reagent for
water determination in
solutions that contain al-
dehydes and/or ketones Titer determination
KF-titration without BV-subtr.
KF-titration with BV-subtraction
Blank determination
KetTiter
KetDeter
KetDet-B
Blank_KF
Titer = C35
Calculation with C35
Calculation with C35
and C38
Blank = C38
BV = Blank value
If you use various titration reagents, generally make sure that the values of the titers for
the various titration reagents are assigned to different common variables which are taken
into account in the calculations of the corresponding titration methods.