Tech Note 421 Detail

Calcium Electrode Specifications

Affected Products:

CI-6727 Calcium Electrode

Problem/Symptom:
What are the specifications for the Calcium Electrode?

PASCO Solution:
  • SLOPE: 26 +/- 2 mV/decade
  • REPRODUCIBILITY: +/- 2%
  • INTERFERENCES: Pb+2, Hg+2, Cu+2, Ni+2
  • TEMPERATURE RANGE: 0 to 40° C (if calibrated at that temperature)
  • PRESSURE RANGE: 0 to 30 psi
  • RESPONSE TIME: 95% response in 30 seconds
  • STORAGE:
    • Long term: store dry
    • Short term: store in 100 ppm calcium standard (0.030 g of CaCl2.H2O per liter of water)
  • CONCENTRATION RANGE:
    • 5 x 10-6 M to 1 M
    • 0.2 ppm to 40,000 ppm
  • pH RANGE: 3 to 10 pH
  • RESISTANCE: 100 megaohms
  • MAINTENANCE: Rinse with distilled water followed by 100 ppm calcium standard.
  • TEMPERATURE COMPENSATION: Yes
  • ISOPOTENTIAL POINT: 1 ppm calcium
  • ON-LINE CAPABILITY: Yes

Note: Calcium complexes are not detected. Keep the concentration of SO4 below 50 ppm and that of CO4/HCO4 below 280 ppm.

Creation Date: 07/15/2003
Last Modified: 07/15/2003
Mod Summary: