Screen-printed carbon electrode for conductivity measurements

Disposable screen-printed electrodes designed to measure conductivity aqueous media in a typical range of 84 µS cm^-1 to 111.8 mS cm^-1. Conductivity sensors are recommended for working with microvolumes and are ideal for decentralized and ‘in situ’ assays.

Recommended instuctions to work with these SPEs:

• Let the sample temper at 25 ºC to obtain accurate measurements
• Place 100 μL onto the cell with the aid of a micropipette
• Measure |Z| in ohm at 10 kHz with an EIS potentiostat
• Subtract resistance value, r₀, in ohm to the |Z| to correct contribution of the electrodes

If |Z| = 3638 Ω and r₀ = 100 Ω then

|Z| – r₀ = 3638 Ω – 100 Ω = 3538 Ω

• Calculate inverted value and multiply by one million to achieve conductivity in μS

(1/3538 Ω) x 1000000 = 283 μS

• Multiply the value by the K_cell to obtain final result in μS·cm-1

If K_cell = 5 cm^-1 then

283 μS x 5 cm^-1 = 1413 μS cm^-1

Disposable screen-printed electrodes designed to measure conductivity aqueous media in a typical range of 84 µS cm^-1 to 111.8 mS cm^-1. Conductivity sensors are recommended for working with microvolumes and are ideal for decentralized and ‘in situ’ assays.

Recommended instuctions to work with these SPEs:

• Let the sample temper at 25 ºC to obtain accurate measurements
• Place 100 μL onto the cell with the aid of a micropipette
• Measure |Z| in ohm at 10 kHz with an EIS potentiostat
• Subtract resistance value, r₀, in ohm to the |Z| to correct contribution of the electrodes

If |Z| = 3638 Ω and r₀ = 100 Ω then

|Z| – r₀ = 3638 Ω – 100 Ω = 3538 Ω

• Calculate inverted value and multiply by one million to achieve conductivity in μS

(1/3538 Ω) x 1000000 = 283 μS

• Multiply the value by the K_cell to obtain final result in μS·cm-1

If K_cell = 5 cm^-1 then

283 μS x 5 cm^-1 = 1413 μS cm^-1