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IBEX Sciences Buffer Solutions are ready-to-use, standardized aqueous systems designed to resist changes in pH when small amounts of an acid or a base are added. [1]
Manufactured by IBEX Sciences, these chemical buffers maintain chemical equilibria and ensure stable molecular conditions, making them vital tools for instrument calibration, molecular biology, and biochemical assays. [1, 2, 3, 4]
Key Product Varieties
Depending on your laboratory application, IBEX Sciences supplies buffers categorized into two primary fields: [1, 2, 3]
1. pH Calibration Buffers (Standard Reference Materials) [1]
These solutions are traceable to primary reference standards and are color-coded to provide instant visual identification, preventing cross-contamination during multi-point calibrations: [1, 2]
- pH 4.01 Buffer (Acidic Range): Typically used for calibrating pH meters in the acidic spectrum. [1, 2]
- pH 7.00 Buffer (Neutral Range): The standard reference solution used as the baseline midpoint for virtually all diagnostic and analytical electrochemical sensors. [1, 2]
- pH 10.01 Buffer (Alkaline Range): Engineered for reliable calibration and verification of electrodes operating in highly alkaline environments. [1, 2]
2. Biological & Molecular Biology Buffers
These formulations are adjusted to highly specific chemical parameters, sterile-filtered, and kept free of nucleases to preserve biological analytes: [1, 2, 3]
- 1 M Tris-HCl Buffer (pH 7.5): A highly stable, concentrated premixed solution widely used in nucleic acid purification, protein extraction, and general molecular biochemistry. [1, 2, 3, 4, 5]
- Electrophoresis Buffers (TAE / TBE): Solutions optimized for maintaining a constant pH and providing electrical conductivity during the separation of DNA, RNA, or proteins inside gel matrices. [1, 2, 3, 4]
Core Operating Principle
Every buffer solution consists of a weak acid and its conjugate base (or a weak base and its conjugate acid). [1]
- Acid Neutralization: If hydronium ions (H⁺) enter the solution, the weak conjugate base reacts with them to prevent the pH from dropping.
- Base Neutralization: If hydroxide ions (OH⁻) enter the solution, the weak acid reacts with them to prevent the pH from rising. [1, 2, 3, 4, 5]
Handling and Storage Best Practices
- Temperature Control: Store tightly capped at controlled room temperature (typically 15°C to 30°C). Avoid freezing, as freezing can cause components to precipitate or alter the exact equilibrium constants.
- Carbon Dioxide Absorption: Keep alkaline buffers (like pH 10.01) sealed immediately after pouring. Open-air exposure allows ambient CO₂ to dissolve into the water, forming carbonic acid and gradually lowering the solution’s actual pH value.
- Contamination Mitigation: Never pour used buffer solution back into the primary stock bottle. Always dispense the required volume into a clean beaker for testing, and discard the remainder after use. [1, 2, 3, 4, 5]
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