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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 |