Stability

Accurate testing ensures your products remain safe, consistent, and compliant. From water activity and moisture to pH and ash, we deliver reliable results tailored to your industry

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What is it?

Overview

Stability testing evaluates the physical and chemical integrity of products under various conditions, ensuring they remain safe, effective, and consistent throughout their shelf life. Key parameters include:

Common Tests

Key Instruments Used

Water Activity Meter

Measure the free water in a product, directly linked to microbial growth and shelf life. Dew point and capacitance sensors provide fast, reliable results across food, pharma, and NHPs.

Water Content Meter

These instruments quantify only water (down to very low levels) ensuring accurate results for sensitive products such as pharmaceuticals, fine chemicals, and oils.

Moisture
Analyzers

Determine total water content using thermogravimetric balances or highly precise Karl Fischer titration. Essential for powders, tablets, oils, and sensitive formulations.

pH Meters & Electrodes

Accurately monitor acidity or alkalinity with benchtop or portable probes. pH stability is critical for product safety, product preservation, and regulatory compliance.

Muffle
Furnaces

High-temperature furnaces quantify ash content by burning off organic matter. This ensures quality, purity, and authenticity in food, supplements, and pharmaceuticals.

Applications Across Industries

Reference Methods

We adhere to established industry standards and reference methods, including ISO, Health Canada Standards, and other relevant guidelines. This ensures the reliability and comparability of our testing results. Our methods are continuously updated to reflect the latest advancements in materials testing.

FAQ

Frequently Asked Questions

Why measure water activity instead of just moisture?

Water activity better predicts microbial growth and spoilage risk than total moisture.

How is ash content relevant?

It reflects mineral content, purity, and can detect adulteration in food and supplements.

Can moisture analyzers measure other volatiles besides water?

Yes, thermogravimetric methods detect all weight loss on heating, including solvents, whereas Karl Fischer meters measure only water.

Do cosmetics require water activity testing?

Yes, it ensures creams and lotions resist microbial contamination during storage.

How is stability testing applied in pharmaceuticals?

It verifies that products remain effective and safe through their entire shelf life.

How is moisture monitoring relevant to manufacturing and automotive industries?

It ensures lubricants, polymers, and composites maintain performance and do not degrade prematurely.

Why is accreditation important for a testing laboratory?

Accreditation (e.g., ISO/IEC 17025) ensures technical competence, traceability, and regulatory acceptance of test results.

How do reference materials support compliance?

Certified reference materials (CRMs) are used to calibrate instruments and validate methods, ensuring accuracy and comparability across labs.

How is method validation different from method verification?

Validation demonstrates a method’s accuracy, precision, and reliability; verification confirms that a lab can reproduce results under its own conditions.