what is the appropriate methodology to study the loss of stability or lapsed chemicals after opening bottles?
Dear Abndellah Aitsbaa,
You can study the stability of compounds having UV-vis spectra by HPLC, UV-vis or even TLC. For those lacking any UV-vis spectra, you can use GC, NMR or MS. Some times FTIR will be useful.
Hoping this will be helpful,
Rafik
take an assay determination with GC.
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