School Savers - Vernier K-BTA Potassium Ion-Selective Electrode

Vernier K-BTA Potassium Ion-Selective Electrode

The Potassium Ion-Selective Electrode makes the measure of potassium ions portable. When used with a Vernier LabQuest 2, the Potassium ISE can be used to take readings in the field – at lakes or streams. This sensor is easier to set up and use than other methods of measuring potassium ion concentration in aqueous solutions. Because it is a stick-style sensor, its use is similar to using a conductivity probe or a pH sensor in a laboratory setting or in the field.
Ion-Selective Electrodes require good chemical technique and careful calibration to obtain accurate results. They are not recommended for middle school or elementary students.
We recommend that you do not purchase Potassium Ion-Selective Electrode replacement modules too far in advance of their expected time of use; degradation occurs while replacement modules are stored on the shelf.

Specifications
Range: 90 – 39,000 mg/L (or parts per million)
pH range: 2 – 12
Temperature Range: 0 – 40°C (not compensated)
Interfering Ions: Rb2+, Cs2+, NH4+, Ca2+, Mg2+, Li+
Electrode Resistance: >50 mO
Electrode Slope: 56 +/- 4 mV/decade at 25°C
Calibration Voltage (typical): 2.7 V (1000 ppm), 1.9 V (10 ppm)
Reproducibility (precision): +/- 11% of full scale
Minimum sample size: 3 mL in a 50 mL beaker
Accuracy: +/- 16% of full scale

What’s Included
Vernier Potassium Ion-Selective Electrode
30 mL bottle of High Standard Standard (1000 mg/L)
30 mL bottle of Low Standard Standard (10 mg/L)
ISE soaking bottle (empty bottle with insertion cap)
User manual

The Potassium Ion-Selective Electrode requires a compatible interface and software to collect data. Interface and software sold separately.

The Potassium Ion-Selective Electrode is compatible with these interfaces:
LabQuest 2
LabQuest
LabQuest Mini
Go!Link
SensorDAQ
Vernier LabPro
Vernier EasyLink
CBL 2
TI-Nspire Lab Cradle

The Potassium Ion-Selective Electrode requires data-collection software:
For computers, Logger Pro 3.8.6.1 or newer.
For LabQuest 2, LabQuest App 2.2 or newer.
For LabQuest, LabQuest App 1.7.1 or newer.
For TI-84 and 83 Plus Silver Edition, EasyData 2.4 or newer.
For TI-Nspire, DataQuest software