Hanna Instruments solution for a 100 ppm chloride standard for calibrating a chloride ISE, one model.
HI4007-02
This Hanna Instruments calibration solution measures a 100 ppm chloride standard for calibrating a chloride ISE.
Chloride matters in corrosion work, in coastal well monitoring and in food, and an ISE measuring it needs bracketing standards to be trusted. One near the expected concentration is worth more than one far from it.
A standard is only a standard while it is uncontaminated and in date. Pour what you need into a clean beaker, never dip an electrode into the bottle, and never return what you poured. Cap the bottle immediately — several of these solutions change value simply by standing open.
Write the opening date on the label. An expired or contaminated standard does not announce itself; it quietly calibrates every instrument in the laboratory to the wrong value.
Add ionic strength adjuster to the standard as well as the sample; an ISE calibrated without it is calibrated against different conditions.
Supplied as one model.