Testing & Verification
Moisture / Water Content
Overview
Moisture or water-content testing measures how much water is associated with a material. It characterises one specific property, separate from identity, purity, and quantity.
What is measured
Moisture/water-content testing estimates the amount of water present in or associated with a material. Water can be picked up from the environment or remain from processing; measuring it characterises this one property specifically.
Why water content is tracked separately
Water content is its own measurement because it can affect how a material behaves and stores, and because it is not captured by identity, purity, or quantity results. It is assessed by approaches suited to detecting water and reported on its own.
What the result describes
A moisture result describes the water content within the method’s scope. It does not describe the identity, purity, or amount of the intended substance, nor contamination categories such as endotoxin or residual solvents.
What this test can and cannot establish
What it can establish
- An estimate of water content within the method’s scope
- Characterisation of one physical property
What it cannot establish
- Identity, purity, or quantity of the intended substance
- Contamination or microbiological status
- Any suitability, safety, or appropriateness for any use
Key terminology
- Moisture / water content
- The amount of water associated with a material.
- Loss on drying
- A general approach in which mass change on drying is used to infer volatile/water content.