The electrodes have sensitive membrane formed by a solid
inorganic substance of monocrystalline or pressed polycrystalline material. The
membrane is mounted in a specially adapted epoxy body of the electrode. The
conductive connection of the sensitive element to the coaxial cable, which is
used for the connection to the measuring instrument, is effected either by a
liquid or a solid contact. The electrode body of the series 37 is made of a
special epoxide resin with excellent mechanical properties, high temperature
stability and a sufficient chemical resistivity.
| Electrode |
Type number |
Tempe rature range
[°C] |
Max. elect. resist.
[MOhm] |
Conc. range
[mol/l] |
pH range
for direct potenciom. |
ISA/pH electrolyte |
Interference
Ki,jpot |
| fluoride |
09-37 |
0-80 |
1 |
10-1-10-6 |
4-7 |
TISAB |
OH-=0,1 |
| chloride |
17-37 |
0-80 |
10 |
10-1-10-5 |
2-12 |
NaNO3 |
Br-=7,6.102, J-=1,3.104,
S2O32-=10,
CN-=105,
NH4+=6,1.10-2, OH-=8.10-2,
S2- must not be present |
| bromide |
35-37 |
0-80 |
5 |
10-1-10-6 |
2-12 |
NaNO3 |
J-=6.103, CN-=104,
NH4+=0,5,
S2- must not be present |
| iodide |
53-37 |
0-80 |
1 |
10-1-10-6 |
3-12 |
NaNO3 |
Cl-=10-5, Br-=10-3,
CN-=1,
S2- must not be present |
| thiocyanate |
58-37 |
0-80 |
1 |
10-1-10-6 |
2-12 |
NaNO3 |
Br-=1,1, S2O32-=1,7,
Cl-=3,6.10-3, NH4+=3,4.10-3 |
| cyanide |
06-37 |
0-80 |
1 |
10-1-10-6 |
12-13 |
NaOH |
J-=2,2, Br-=1,6.10-4, Cl-=1,1.10-5,
S2O32-=1,1.10-5 |
| sulphide |
16-37 |
0-80 |
1 |
10-1-10-6 |
13-14 |
NaOH |
Cl-, Br-, S2O32-, S2O32-<10-5,
Hg2+, Ag+ must not be present |
| silver |
47-37 |
0-80; |
1 |
10-1-10-6 |
2-5 |
NaNO3 |
Hg2+, S2- must not be present |
| copper |
29-37 |
0-80 |
1 |
10-1-10-6 |
2-5 |
NaNO3 |
Pb2+, Fe2+=10, Ni2+<10-4
,Ag+, Hg2+ must not be present |
| lead |
82-37 |
0-80 |
1 |
10-1-10-6 |
2-5 |
NaNO3 |
Cd2+=3,4.10-1, Zn2+=7,4.10-5,
Ni2+=4,7.10-4, Mn2+=6,8.10-5,
Co2+=1,6.10-4, Mg2+=4,6.10-5,
Ag+, Cu2+, Hg2+, S2-,
Fe3+ must not be present |
| cadmium |
48-37 |
0-80 |
1 |
10-1-10-6 |
2-5 |
NaClO4 |
Pb2+=7,3.10-1, Co2+=
1,6.10-4, Zn2+=4,4.10-5, Mn2+=1,9.10-5,
Ni2+=4,9.10-5, Ca2+=3,9.10-6,
Mg2+=3,1.10-6, Ag+, Cu2+, Hg2+,
S2- must not be present |
