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Ensure your hand sanitizers are truly effective with the right pH! The WHO emphasizes the importance of specific formulations, especially in healthcare settings, to maximize pathogen protection. With most hand sanitizers falling within a pH range of 5.5 to 8.0, it is crucial to maintain this balance—too high or too low can lead to skin irritation and diminished germ-fighting power.
But here's the catch: measuring the pH of hand sanitizers can be tricky due to a couple of challenges, as outlined below:
- Complex Composition: Alcohol-based sanitizers are packed with active ingredients, thickening agents, fragrances, preservatives, and coloring agents, which can complicate the measurement process.
- Sensor Specifications: Standard pH sensors just won’t cut it—they need to be designed to handle high alcohol concentrations, with features like fast electrolyte outflow, robust shaft, and membrane materials.
Discover METTLER TOLEDO’s InLab™ Max Pro-ISM —this innovative sensor is your best ally for overcoming these challenges, providing reliable pH measurements for hand sanitizers. Our comprehensive application note offers detailed insights into the sensor’s features, step-by-step instructions for precise pH measurement, and best measurement practices to prolong the sensor’s lifespan in high-alcohol environments.
Don’t leave the effectiveness of your hand sanitizers to chance. Download our application note now and ensure your pH measurements are on point!
Unstable readings while measuring the pH of hand sanitizer?
Watch our video to see how METTLER TOLEDO sensors can help overcome challenges.
Below, we explore some more facts about the pH of hand sanitizers.
What are the main types of hand sanitizers?
The main types of hand sanitizers are alcohol-based and non-alcohol-based sanitizers. Alcohol-based sanitizers typically contain 60-95% alcohol (ethanol or isopropyl alcohol) as their active ingredient, while non-alcohol-based sanitizers may contain other antimicrobial agents.
How do alcohol-based hand sanitizers work?
Alcohol-based hand sanitizers work by denaturing proteins and disrupting the cell membranes of bacteria and viruses, effectively killing them. They are generally considered more effective against a wider range of germs than non-alcohol-based options.
Why is pH important in hand sanitizer?
The pH level can affect the effectiveness of the active ingredients in the sanitizer. A neutral to slightly acidic pH helps maintain the efficacy of alcohol-based sanitizers while being gentle on the skin.
Are all hand sanitizers the same in terms of pH?
No, different formulations can have varying pH levels. It's important to read the label or consult the manufacturer for specific pH information about a particular product.
Does pH affect the shelf life of hand sanitizer?
While pH itself does not directly determine shelf life, extreme pH levels can lead to the degradation of active ingredients, potentially reducing the effectiveness of the sanitizer over time.
What extra maintenance is needed for pH sensors in hand sanitizers beyond calibration and washing?
As hand sanitizer contains alcohol, besides typical maintenance like calibration and washing it with deionized water after each sample, it is also important to regularly replenish the membrane for 2 minutes in pH buffer 4.00.
