NAVI F-52, Instruction Manual

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Chapter 16 Reference
16.3 Ion measurement
F-52, 53, 54, 55 237
(2) Combination type ION electrode
The composite type ion electrode is designed to allow its chip type ion electrode to be
removed easily. If you wish to measure some of the ion species listed in the following table in
addition to those included in the standard specification, change the chip type ion electrode and
the internal liquid in the reference part of the composite type ion electrode. These changes
permits you to perform measurement un up to five ion species.
Each chip type ion electrodes is available as an extra-cost option unless it is provided as one
of the standard accessories. In accordance with the target ion species, select appropriate chip
electrodes from the following table. The applicable temperature range is 0 to 50
℃
for all the
electrodes.
Model and
ion type Applica-
ble chip
elec-
trode
type
(quantity) (1) Measurable range
(2) pH allowable range
*1
(3) Electric potential
slope
*2
interfering ions and
allowable limit for
their coexistence
*3
Reference elec-
trode (outer cylin-
der)
and internal liquid
type
*4
6560-10C
Chloride
Cl
-
7660
(1 pc)
①
0.4 to 35000 mg/L Cl
-
(1 to 10
-5
mol/L Cl
-
)
②
pH 3 to 11
(350 mg/L Cl
-
)
③
-59 mV
NO
3
-
, F
-
, HCO
3
-
,
SO
4
2-
, PO
4
2-
=more
than 1000
SCN
-
=0.3
MnO
4
-
=0.1
Br
-
=0.03
S
2
O
3
2-
, S
2-
, I
-
, Ag
+
,
Hg
2+
=Not applicable
(At 10
-3
mol/L Cl
-
)
1 mol/L KNO
3
(100 g/L Potas-
sium nitrate)
6561-10C
Fluoride
F
-
7661
(1 pc)
①
0.02 to 19000 mg/L F
-
(1 to 10
-6
mol/L F
-
)
②
pH 3 to 11
(350 mg/L F
-
)
③
-59 mV
OH
-
=10
Disturbance may
occur due to the for-
mation of complex
when polyvalent ions
such as Al
3+
,
F
3+
coexist.
3.33 mol/L KCl
(250 g/L potas-
sium chloride)
6581-10C
Nitrate
NO
3
-
7681
(1 pc) ①
0.62 to 62000 mg/L
NO
3
-
(1 to 10
-6
mol/L NO
3
-
)
②
pH 3 to 7
(62 mg/L NO
3
-
)
③
-55 mV
SO
4
2+
=more than
1000
CH
3
COO
-
=300
F
-
=200
Cl
-
=40
NO
2
-
=3
I
-
=0.1
ClO
4
-
=0.02
(At 10
-3
mol/L NO
3
-
)
1 mol/L KCl
(100 g/L potas-
sium chloride)