Loss on drying, water determination and water conductivity.
| Tests |
|
|---|---|
| Method | Tested to the USP chapter, monograph or customer specification you choose. |
| Results | Reported against your monograph or specification, with pass/fail where limits apply. |
| Price | Quoted per project |
Loss on drying measures all volatile matter, water determination measures water specifically, and water conductivity assesses the ionic purity of pharmaceutical water. The monograph says which applies.
Determines the amount of volatile matter of any kind driven off under the specified conditions, which USP <731> defines as the loss on drying value. Where water is the only volatile constituent, USP points to water determination instead, as the individual monograph specifies.
Measures the water content of articles that are hydrates or contain adsorbed water. Water determination by Karl Fischer titration is available. USP <921> describes more than one method type and the monograph for the article names which applies; the compendial procedure for your material is confirmed at quote.
Measures the electrical conductivity of pharmaceutical water as a check on its ionic purity. USP <645> explains that water dissociates into ions in a predictable way with pH and temperature, and that dissolved gases such as carbon dioxide also form ions that affect conductivity.
Send the material or product sealed and labeled, with its storage conditions.
Tell us the monograph or specification, the tests you need and the number of samples. We work to the current official USP-NF unless you name another applicable edition, and confirm the sample amount at quote.
Questions about a sample or a method, call 360-967-7010 or email [email protected].
