Metrohm 781 pH/Ion Meter - Manual (Page 81)

6 Methods / Parameters
780/781 pH/Ion Meter, Manual
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6.5 Direct ion measurement (781 only: Conc
mode)
6.5.1 Type of measurement
PARAMETER Conc
├
meas.type
:
The type of measurement describes the analytical principle of ion
measurement.
meas.type: direct, std.add, smpl.add
In general a differentiation is made between direct measurement and
the standard or sample addition methods. The selection of the method
parameters depends on the measurement type which has been cho-
sen. All the method parameters for direct ion measurement are de-
scribed in this section. The descriptions of the ion parameters ,
measuring parameters and calculation parameters which this
section contains also apply to the standard addition and sample additi-
on types of ion measurement. As a result the following explanation of
the parameters for the standard and sample addition in Section 6.6 is
limited to the specific method parameters.
Please note that changing this Conc parameter meas.type does not in-
clude a change of the current method. Within the mode Conc a method
contains all parameter settings.
6.5.2 Ion parameters
PARAMETER Conc
:
├
ion parameters
: ├
ion type
├
ion name
├
ion charge
└
conc.unit
The ion parameters describe the name, charge and concentration units
of the ion to be determined.
Ion: Ag(+1), BF4(-1), Br(-1), Ca(+2), Cd(+2),
Cl(-1), CN(-1), Cu(+2), F(-1), I(-1), K(+1),
Na(+1), NH4(+1), NO2(-1), NO3(-1), Pb(+2),
S(-2), SCN(-1), SO4(-2), own
The name of the analyte can be selected here. The additional option
' own ' allows the analyte to be determined to be given its own name
and charge:
ion name 7 ASCII characters
ion charge -9...-1, 1...9