Ion-Selective Electrodes
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Our Ion-Selective Electrodes are great for monitoring four environmentally important ions: Nitrate (NO3-), Chloride (Cl-), Calcium (Ca2+) and Ammonium (NH4+).
Features:
Electrodes are combination-style, non-refillable and gel-filled. It is important for you to know that the PVC membranes of the Nitrate, Calcium and Ammonium ISEs have a limited life expectancy of one to two years. This is true of all ISEs with PVC membranes. Replacement modules for these ISEs allow you to simply discard the used one and replace it with a new module. We recommend that you do not purchase replacement modules far in advance of their expected time of use as their life expectancy is limited as well. The Chloride ISE has a solid state membrane and therefore does not need to be replaced. Included with each ISE are two calibration standards and a short-term soaking bottle.
User Guide and Technical InfoGeneral Specifications:
| Electrode Resistance: | 1 to 4 MΩ |
| Reproducibility: | ± 5% of reading |
| Temperature range (can be placed in): | 0 to 50°C (no temperature compensation) |
| Minimum immersion: | 1 inch |
| Electrode Length: | 155 mm |
| Body Diameter: | 12 mm |
| Cap Diameter: | 16 mm |
| Cable Length: | 100 cm |
The Ammonium Ion-Selective Electrode (ISE) can be used to measure the concentration of Ammonium (NH4+) in aqueous samples.
Use the Ammonium ISE to measure levels of ammonium ions introduced from fertilizers. It can also indicate aqueous ammonia levels if sample solutions are acidified to convert NH3 to NH4+.
The Ammonium ISE has a combination-style, non-refillable, gel-filled electrode. Like all other PVC ISE membranes, the membrane on the ISE has a limited life expectancy. However, the replaceable module of ISE allows you to simply discard the used membrane module, and replace it with a new one.
Order Code: VR105648 Price £
| Range: | 0.10 to 18,000 mg/L or ppm (5.5x10-6 M to 1.0 M) |
| Resolution (LabQuest, LabQuest Mini, Go!Link, LabPro): | |
| % of reading: | 0.7% | |
| Low scale reading: | 1.8 ±0.013 | |
| High scale reading: | 35,500 ±250 mg/L |
| pH Range: | 4 to 7.5 |
| Interfering Ions: | K+ |
| Electrode Slope (log voltage vs. concentration): | +56 mV/decade |
Replacement Parts and Spares
ISE Ammonium Replacement Module. Order Code: VR106248 Price £
ISE Ammonium Low Standard. Order Code: VR106256 Price £
ISE Ammonium High Standard. Order Code: VR106264 Price £
Experiments:
Measure the concentration of ammonium nitrogen in a stream or lake using an Ammonium Ion-Selective Electrode (ISE).
Taken from the Water Quality with Vernier Lab Book.
Download Experiment Preview. The student-version preview includes:
- Step-by-step instructions for computer-based data collection
- List of materials and equipment
Note: The experiment preview of the computer edition does not include essential teacher information, safety tips, or sample data. Instructions for Logger Pro and other software (such as LabQuest App or TI handheld software, where available) are on the CD that accompanies the book. We strongly recommend that you purchase the book before performing experiments.
The Calcium Ion-Selective Electrode (ISE) can be used to measure the concentration of Calcium (Ca2+) in aqueous samples.
Data from the Calcium ISE can give a good indication of hardness of water (as Ca2+). The concentration of Calcium is also used as an endpoint indicator in EDTA-Ca/Mg hardwater titrations.
The Calcium ISE has a combination-style, non-refillable, gel-filled electrode. Like all other PVC ISE membranes, the membrane on the ISE has a limited life expectancy. However, the replaceable module of ISE allows you to simply discard the used membrane module, and replace it with a new one.
Order Code: VR105656 Price £
| Range: | 0.20 to 40,000 mg/L or ppm (5x10-6 M to 1.0 M) |
| Resolution (LabQuest, LabQuest Mini, Go!Link, LabPro): | |
| % of reading: | 1.4% | |
| Low scale reading: | 0.20 ±0.00281.8 | |
| High scale reading: | 40,000 ±560 mg/L |
| pH Range: | 3 to 10 |
| Interfering Ions: | Pb2+, Hg2+, Sr2+, Cu2+, Ni2+ |
| Electrode Slope (log voltage vs. concentration): | +28 mV/decade |
Replacement Parts and Spares
ISE Calcium Replacement Module. Order Code: VR106280 Price £
ISE Calcium Low Standard. Order Code: VR106288 Price £
ISE Calcium High Standard. Order Code: VR106296 Price £
Experiments:
Measure the calcium ion concentration in a stream or lake, in mg/L as Ca2+, using a Calcium Ion-Selective Electrode (ISE). Determine the calcium hardness as CaCO3 in mg/L.
Taken from the Water Quality with Vernier Lab Book.
Download Experiment Preview. The student-version preview includes:
- Step-by-step instructions for computer-based data collection
- List of materials and equipment
Note: The experiment preview of the computer edition does not include essential teacher information, safety tips, or sample data. Instructions for Logger Pro and other software (such as LabQuest App or TI handheld software, where available) are on the CD that accompanies the book. We strongly recommend that you purchase the book before performing experiments.
The Chloride Ion-Selective Electrode is used to measure the concentration of Chloride (Cl-) in aqueous samples.
The concentration of the Chloride ion gives a quick measurement of salinity of water samples. Use the Chloride ISE to measure chloride levels in ocean saltwater or salt in food samples.
The Chloride ISE has a combination-style, non-refillable, gel-filled electrode. Unlike other ISEs available from Vernier, the Chloride ISE has a solid-state membrane that does not need to be replaced.
Order Code: VR105664 Price £
| Range: | 1.8 to 35,500 mg/L or ppm (5x10-5 M to 1.0 M) |
| Resolution (LabQuest, LabQuest Mini, Go!Link, LabPro): | |
| % of reading: | 0.7% | |
| Low scale reading: | 1.8 ±0.013 | |
| High scale reading: | 35,500 ±250 mg/L |
| pH Range: | 2 to 12 |
| Interfering Ions: | CN-, Br-, I-, S2- |
| Electrode Slope (log voltage vs. concentration): | -56 mV/decade |
Replacement Parts and Spares
ISE Chloride Low Standard. Order Code: VR106312 Price £
ISE Chloride High Standard. Order Code: VR106320 Price £
Experiments:
Measure the chloride ion concentration in a stream or lake using a Chloride Ion-Selective Electrode. Measure the salinity value of the water (in ppt) using a Conductivity Probe.
Taken from the Water Quality with Vernier Lab Book.
Download Experiment Preview. The student-version preview includes:
- Step-by-step instructions for computer-based data collection
- List of materials and equipment
Note: The experiment preview of the computer edition does not include essential teacher information, safety tips, or sample data. Instructions for Logger Pro and other software (such as LabQuest App or TI handheld software, where available) are on the CD that accompanies the book. We strongly recommend that you purchase the book before performing experiments.
The Nitrate Ion-Selective Electrode (ISE) can be used to measure the concentration of Nitrate (NO3-) in aqueous samples.
Nitrate concentration, which can be increased by acidic rainfall, fertilizer runoff from fields, and plant or animal decay or waste, is an important parameter in nearly all water quality studies. Use the Nitrate ISE to determine the concentration of the nitrate ion in a water sample.
The Nitrate ISE has a combination-style, non-refillable, gel-filled electrode. Like all other PVC ISE membranes, the membrane on the ISE has a limited life expectancy. However, the replaceable module of ISE allows you to simply discard the used membrane module, and replace it with a new one.
Order Code: VR105672 Price £
| Range: | 0.10 to 14,000 mg/L or ppm (7x10-6 M to 1.0 M) |
| Resolution (LabQuest, LabQuest Mini, Go!Link, LabPro): | |
| % of reading: | 0.7% | |
| Low scale reading: | 0.10 ±0.0007 | |
| High scale reading: | 14,000 ±98 mg/L |
| pH Range: | 2.5 to 11 |
| Interfering Ions: | CIO4-, I-, ClO3-, CN-, BF4- |
| Electrode Slope (log voltage vs. concentration): | -56 mV/decade |
Replacement Parts and Spares
ISE Nitrate Replacement Module. Order Code: VR106336 Price £
ISE Nitrate Low Standard. Order Code: VR106344 Price £
ISE Nitrate High Standard. Order Code: VR106352 Price £
Experiments:
Determine the concentration of nitrate ions, NO3-, in a water sample from a stream or lake.
Taken from the Water Quality with Vernier Lab Book.
Download Experiment Preview. The student-version preview includes:
- Step-by-step instructions for computer-based data collection
- List of materials and equipment
Note: The experiment preview of the computer edition does not include essential teacher information, safety tips, or sample data. Instructions for Logger Pro and other software (such as LabQuest App or TI handheld software, where available) are on the CD that accompanies the book. We strongly recommend that you purchase the book before performing experiments.
* All prices are exclusive of delivery & VAT. E&OE.
As part of the WEEE (Waste Electronic and Electrical
Equipment) regulations in the UK we also have a commitment
towards the appropriate disposal of electronic waste. Items displaying
the symbol should not be disposed of with normal waste. Please contact us for more
information on correct disposal.
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impact on the environment and helping to create an ecologically
sustainable future. We recycle everything we can, from our packaging
materials down to our tea bags. As well as this, we carefully select our business
partners to ensure they follow a similar code and our major partners are increasingly using
solar energy as their predominant source of electricity.