Sample Preparation
One factor that may affect the water activity (aw) measurement is the sample preparation procedure. Eliminating or reducing this potential variable will yield more consistent and reliable water activity readings. Reducing variability due to sample preparation will also enable researchers and technicians to better identify other causes of aw change in their products.
Prominent reasons for product aw fluctuation not due to sample preparation include changes in product formulation, processing methods, or temperature. Such changes may influence product quality, shelf-life, and safety
