출처 : ALS Co., Ltd
Internal solution preparation
The internal solution of an Ag/Ag+ reference electrode used in a non aqueous solvent system consists mainly of a salt containing Ag+ ions and a supporting electrolyte added to the same non aqueous solvent as the solution sample to be measured.
Here, as an example, an acetonitrile (ACN) solution containing 0.01 mol/L silver(I) nitrate (AgNO3) and 0.1 mol/L tetrabutylammonium perchlorate (TBAP) is prepared.
- The reagents used for preparation are not available at our company. Please prepare commercially available special grade reagents separately.
- Please use acetonitrile that has been dried and dehydrated in advance.
- Be sure to wear protective equipment while working, and be careful when handling chemical substances.
- The amount of solution to be prepared is only a guide, so please consider it according to your experimental plan.
Fig. 1 What you need to prepare:
(1) Volumetric flask (25 mL, 50 mL)
(3) Medicine wrapping paper
(4) Beaker 50 mL (2 pcs)
(5) Pipette 1 mL;
(6) Glass rod (stirring rod);
(7) Light shielding bottle
Fig. 2 Weigh 1.71 g tetrabutylammonium perchlorate (TBAP) using an analytical digital balance and medicine wrapping paper. The TBAP is then transferred from the medicine wrapping paper to a 50 mL beaker, and a small amount of acetonitrile (ACN) solution is added to the beaker to dissolve the TBAP.
Fig. 3 Transfer the solution from the beaker to a 50 mL volumetric flask using a glass rod or similar to prevent spillage. Using a 1 mL pipette, adjust the volume of the volumetric flask to 50 mL while adding ACN solution to prepare a 0.1 mol/L TBAP/ACN solution.