BANTE Calcium Ion Selective Electrode User Guide

: June 6, 2024
: BANTE

Table of Contents

Required Equipment and Solutions
Prior to Use
Measurement and Calibration Hints
Electrode Maintenance
Specifications
Optional Accessories
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Calcium
Ion Selective Electrode I User Guide

This ion-selective electrode is designed for the detection and analysis of calcium ions in an aqueous solution and is suitable for laboratory applications.

Required Equipment and Solutions

An ion meter
Volumetric flasks and beakers
Distilled or deionized water:
To prepare the standard solutions or rinse the electrode between measurements.
Ionic strength adjuster (order code: ISA-Ca):
To keep a constant background ionic strength and adjust the pH.
Calcium standard solution 0.1M:
To prepare this standard solution, half fill a 1-liter volumetric flask with distilled water and add 14.7 grams of
analytical grade calcium chloride (CaCl₂•2(H₂O)) reagent. Swirl the volumetric flask gently to dissolve the reagent and fill it to the mark with distilled water. Cap and upend the volumetric flask several times to mix the solution.
Calcium standard solution 1000 ppm:
To prepare this standard solution, half fill a 1-liter volumetric flask with distilled water and add 3.67 grams of analytical grade calcium chloride (CaCl₂•2(H₂O)) reagent. Swirl the volumetric flask gently to dissolve the reagent and fill it to the mark with distilled water. Cap and upend the volumetric flask several times to mix the solution.

Calcium ISE

Prior to Use

Remove the protective cap from the bottom of the electrode.
Soak the electrode in 100 ppm standard solution for about 10 minutes.

Measurement and Calibration Hints

Do not use this electrode to measure the strongly acidic or alkaline samples, strong detergents, and organic solvents, these solutions will cause permanent damage to the electrode.
For better accuracy, we recommend adding the ionic strength adjuster (ISA) to all of the standards and samples. A typical addition would be 2 ml ISA to 100 ml of standard and sample solutions.
During the calibration and measurement, ensure that all standard and sample solutions are at the same temperature.
The calibration should be from the lowest concentration standard to avoid cross-contamination.
The sample solution must fall in the pH range of 3.5 to 11. If necessary, add the ionic strength adjuster.
Stir the standard and sample solutions at a uniform rate that will be promoting the accuracy of measurement.

1. Calibrate the meter according to the manufacturer’s instructions.
2. Rinse the electrode with distilled water and blot dry.
3. Place the electrode into the sample and record the stable reading.

Electrode Maintenance

Rinse the electrode thoroughly with distilled water after use, wipe clean with lint-free tissue, then replace the protective cap and store the electrode in a dry, cool, and well-ventilated area.
Never touch or scratch the ion-sensitive membrane on the bottom of the electrode.
If the electrode response becomes sluggish, soak the electrode in 100 ppm standard solution for at least 1 hour.

Specifications

Model	ISE-Ca
Concentration Range	0.02 to 40100 ppm
Slope	24 to 29 mV/decade
pH Range	3.5 to 11
Interferences	Ba²+, Cu²+, Sr²+
Operating Temperature	5 to 50°C (41 to 122°F)
Electrode Dimensions	150 (L) × 12 (Dia.) mm (5.9 × 0.47″)
Cable Length	1 m (3.3 ft)
Connector	BNC
Body Type	Epoxy