Fluoride Standard (5 ppm) with TISAB II

Features:

• Interference Suppression: The TISAB II component contains CDTA, which effectively chelates polyvalent metal ions like Aluminum (Al³⁺) and Iron (Fe³⁺). This releases "bound" fluoride for accurate measurement of total fluoride content.
• Optimal pH Stability: Maintains the solution between pH 5.0 and 5.5, preventing the formation of hydrofluoric acid ($HF$) and eliminating hydroxide (OH^-) ion interference.
• Ionic Strength Equalization: Provides a high and constant background of inert ions, satisfying the requirements of the Nernst equation so the electrode responds only to the concentration of the fluoride analyte.
• Standardized Reproducibility: Manufactured under strict quality controls to ensure batch-to-batch consistency for regulated environmental testing.

Safety & Regulatory Information:

WARNING! Chemical Hazard: This solution contains TISAB II (acetic acid and sodium chloride). It may cause mild skin, eye, and respiratory irritation.

• Personal Protection: Wear nitrile gloves, safety splash goggles, and a lab coat. Use in a well-ventilated laboratory environment.
• Storage: Store at controlled room temperature (15°C to 30°C) in the original polyethylene container.
• Important Handling Note: Never store in glass containers. Fluoride ions react with the silica in glass, which will etch the bottle and significantly alter the concentration of the standard over time.
• Measurement Tip: To ensure maximum accuracy, ensure your samples are also mixed in a 1:1 ratio with TISAB II before measurement.