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Ion Selective Electrodes ISEPlease contact our sales team for our best possible prices:Phone: +44 (0) 1337 831192 Fax: +44 (0) 1337 371192 email: sales@rmsupply.co.uk
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There follows a chart listing our range of Ion Selective Electrodes (please quote the relevant order number when contacting our sales team)
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ORDER NUMBER |
ELECTRODE | TYPE | pH RANGE |
TEMP RANGE (°C) |
CONCENTRATION RANGE (#) |
LOWER LIMIT (ppm) |
INTERFERENCES and SELECTIVITY RATIOS |
RECOMMENDED REFERENCE ELECTRODE |
R.M.S STANDARD SOLUTIONS |
RECOMMENDED ISAB |
NOTES |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 321-75 | Ammonia (NH3) | Gas permeable membrane | 11 - 13 | 0 - 50 | 1M - 10-6M | 0.02 | Hydrazine = 5 x
10-2 Aliphatic amines 0.1 - 0.5 |
None required | 0.1M 1000ppm |
1M NaOH | - |
| 334-75 | Ammonium (NH4+) | Liquid membrane | 5 - 8 | 0 - 50 | 10-1 - 10-6M | 0.02 | K+ =
1.2 x 10-1 Na+ = 2.0 x 10-3 Mg2+ = 2.0 x 10-4 |
Double junction
R2 0.1M LiAc |
0.1M 1000ppm |
4M LiAc | - |
| 312-75 | Barium (Ba2+) | Liquid membrane | 5 - 9 | 0 - 50 | 1M-5 - 10-5M | 10 | Na+ =
4 x 10-4 K+ = 9.0 x 10-3 Ca2+ = 2.5 x 10-2 |
Double junction
R2 0.1M LiCl |
0.1M 1000ppm |
4M LiAc | |
| 302-75 | Bromide (Br-) | Solid state | 2 - 12 | 0 - 80 | 1M-5 - 10-6M | 0.4 | I-, S OH-=3x10-5, Cl-=2.4x10-3 |
Double junction
R2 0.1M NaNO3 |
0.1M 1000ppm |
5M NaNO3 | - |
| 309-75 | Cadmium (Cd2+) | Solid state | 3 - 7 | 0 - 80 | 10-1 - 10-6M | 0.2 | Ag+,
Hg2+, Cu2+<10-7M High levels of lead and ferric ion interfere |
Single junction R1 | 0.1M 1000ppm |
5M NaNO3 | - |
| 310-75 | Calcium (Ca2+) | Liquid membrane | 4 - 9 | 0 - 50 | 1M-5 - 10-7M | 0.02 | Mg2+
= 2.5 x 10-4 Ba2+ = 3 x 10-3 Pb2+ = 0.1, Zn2+ = 1.0 Na+ = 1.5 x 10-4 |
Double junction
R2 0.1M NaNO3 |
0.1M 1000ppm |
4M KCl | - |
| 301-75 | Chloride (Cl-) | Solid state | 2 - 11 | 0 - 80 | 1M-5 - 10-5M | 1.8 | Br-,
I- and Cn- must be absent S2- must be less than 10-7M |
Double junction
R2 0.1M NaNO3 |
0.1M 1000ppm |
5M NaNO3 | - |
| 306-75 | Copper (Cu2+) | Solid state | 0 - 7 | 0 - 80 | 1M-5 - 10-6M | 0.3 | S2+,
Ag+ and Hg2+ should be absent Cl-, Br- interfere |
Double junction
R2 0.1M NaNO3 |
0.1M 1000ppm |
5M NaNO3 | - |
| 304-75 | Cyanide (Cn-) | Solid state | 10 - 14 | 0 - 80 | 10-2 - 10-6M | 0.03 | S2-
must be less than 10-7M I- = 1.0 |
Double junction
R2 0.1M NaNO3 |
0.1M 1000ppm |
5M NaOH | |
| 337-75 | Fluoride (F-) | Solid state | 5 - 8 | 0 - 80 | 1M-5 - 10-7M | 0.01 | OH- = 10-1 | Single junction R1 | 0.1M 1000ppm |
TISAB | - |
| 303-75 | Iodide (I-) | Solid state | 3 - 12 | 0 - 80 | 1M - 10-7M | 0.02 | S2-
must be less than 10-7M CN- = 1.0 |
Double junction
R2 0.1M NaNO3 |
0.1M 1000ppm |
5M NaNO3 | |
| 307-75 | Lead (Pb2+) | Solid state | 0 - 9 | 0 - 80 | 10-1 - 5 x 10-6M | 1.0 | S2-,
Ag+, Hg2+ should be absent Cd2+, Cu2+, Fe3+ interfere |
Double junction
R2 0.1M KNO3 |
0.1M 1000ppm |
5M KNO3 | |
| 311-75 | Nitrate (NO-3) | Liquid membrane | 3 - 10 | 0 - 50 | 1M - 5 x 10-6M | 0.08 | Cl- =
10-2, NO-2 = 3 x 10-2 Br- = 5 x 10-2 SO42- = 3.5 x 10-3 F- = 10-6, ClO3- = 20, ClO4- = 16.2 |
Mercury Sulphate
R1 Hg2SO4 or Double junction R2 0.1M (NH4)SO4 |
0.1M 1000ppm |
1M KH2PO4 | |
| 314-75 | Potassium (K+) | Liquid membrane | 4 - 9 | 0 - 50 | 1M - 10-6M | 0.04 | Na+ =
2.6 x 10-3 Ca2+ = 2.5 x 10-3 Rb+ = 1.9 Mg2+ = 1.9 x 10-3 Cs+ = 0.38, NH4+ = 0.30 |
Double junction
R2 0.1M Tetra-ethyl Ammonium Chloride |
0.1M 1000ppm |
1M Tetra-ethyl Ammonium Chloride | - |
| 308-75 | Silver (Ag+) | Solid state | 2 - 9 | 0 - 80 | 1M - 10-7M | 0.01 | S2-
and Hg2+ must be absent |
Double junction
R2 0.1M NaNO3 |
0.1M 1000ppm |
5M NaNO3 | - |
| 315-75 | Sodium (Na+) | Glass sensing membrane | 9 - 12 | -5 - 70 | Sat - 10-6M | 1ppb | Li+ =
2 x 10-2 K+ = 1 x 10-3 NH4+ = 3 x 10-3 Ag should be absent |
Double junction
R2 0.1M NH4Cl |
0.1M 1000ppm |
SISAB | - |
| 305-75 | Sulphide (S2-) | Solid state | 12 - 14 | 0 - 80 | 1M - 10-7M | 0.003 | Hg2+
and Ag+ must be absent |
Single junction R1 | SAOB | ||
| 331-75 | Voltammetric Indicator |
Solid state | - | 0 - 80 | - | - | Single junction R1 | - |
NOTES:
# - Linear, plus non-linear range.
a - Can be used to determine Mercury.
b - High levels of Cyanide rapidly attack membrane. Measurements should be made at pH > 12.
c - All measurements must be at pH > 12.
d - Can be used to titrate sulphate with Ba (NO3)2.
e - Used to measure redox systems.
f - For low level work, contact R.M.S Limited.
g - Detection limit = S/N = 1.
h - As Iodide.
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