Reference electrodes
Reference electrodes are widely used as for electrochemical measurements (CV, LSV, DPV, etc.) and electrochemical devices (electrochemical detectors for HPLC, electrochemical biosensor, etc.). Various kinds of them such as aqueous, nonaqueous, calomel and own-constructing types are available.
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Catalog No. |
Description | Length (mm) | OD(mm) | Liquid Conjunction Tip | Internal solution |
| 012167 | RE-1B Silver - silver chloride reference electrode | 70 | 6 | Vycor glass | 3 M NaCl |
| 012168 | RE-1S Silver - silver chloride reference electrode | 40 | 4.5 | Vycor glass | 3 M NaCl |
| 012169 | RE-3V Silver - silver chloride reference electrode | 48 | 10 | Vycor glass | 3 M NaCl |
| 012171 | RE-7 Non Aqueous reference electrode | 70 | 6 | Vycor glass | ACN/TBAP |
| 012172 | RE-7S Non Aqueous reference electrode | 40 | 4.5 | Vycor glass | ACN/TBAP |
| 012173 | RE-7V Non Aqueous reference electrode | 48 | 10 | Vycor glass | ACN/TBAP |
| 012174 | RE-7VP Non Aqueous reference electrode | 48 | 10 | Vycor glass | ACN/TBAP |
| 002058 | RE-1C Silver - silver chloride reference electrode | 90 | 6 | Ceramic |
Saturated KCl |
| 002056 | RE-2B Calomel reference electrode | 90 | 6 | Ceramic |
Saturated KCl |
| 002057 | RE-2C reference electrode | 90 | 6 | Ceramic |
Saturated K2SO4 |
| 011503 | RE-6H reference electrode Kit available in alkaline solution | 90 | 6 | Ceramic | -*- |
Applications
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RE-1B - Ag/Cl Reference electrode for CV RE-1S - Ag/Cl Reference electrode for SECM RE-1C - Ag/Cl Saturated KCl Reference electrode RE-3V - Ag/Cl Reference electrode applied to Flow cell RE-7 - Ag/Ag+ Reference electrode for CV of Non-Aqueous solvent RE-7S - Ag/Ag+ Reference electrode for SECM RE-7V - Ag/Ag+ Reference electrode applied to Flow cell RE-2B - Available as a standard electrode of reference electrodes RE-2C - Reference electrode free from chloride ion RE-6H - Reference electrode kit available in alkaline solution |
Reference Electrode potentials at 25 °C
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NHE (Normal Hydrogen Electrode)---------------------------------- 0 mV SCE (Potassium Saturated Calomel Electrode)---------------- 241 mV SSCE (Sodium Saturated Calomel Electrode)------------------ 236 mV Ag/AgCl (Saturated KCl)------------------------------------------- 198 mV Hg/Hg2SO4 (0.5 M H2SO4)------------------------------------------- 682 mV |
"Akira Fujishima, Masuo Aizawa, Toru Inoue, "Methods of Electrochemical Analysis (1984)" Gihodo shuppan"
RE-2C Reference Electrode [Catalog No. 002057]
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Developed for the sake of eliminating any influence of chloride ion from measurements. Consists of mercury, mercury sulfate and saturated potassium sulfate solution. Hg2SO4 + 2e = 2Hg + SO42- E0 = 650 mV VS NHE (25 °C) |
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| 002056 RE-2B Calomel reference electrode | 002058 RE-1C Silver - silver chloride reference electrode |
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Hg2Cl2 + 2e = 2Hg + 2Cl- E0 = 241 mV VS NHE (25 °C) |
AgCl + e = Ag+ + Cl- E0 = 199 mV VS NHE (25 °C) |
| RE-2B Calomel reference electrode and RE-1C Silver - silver chloride reference electrode have the same shape as RE-2C. | |
Supporting Electrolyte
Supporting electrolyte is indispensable in electrochemistry. Following terms should be taken into account to choose adequate one for your application:
1. Soluble enough in solvent
2. The potential window is wide
3. No reaction with solvent and sample
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Common Support Electrolyte using for organic solvent: TEAP: Tetraethylammonium perchlorate TBAPF6: Tetrabutylammonium hexafluorophosphate etc. |
