Let's see. Your choices include gas chromatography (GC), gas chromatography-mass spectrometry (GC/MS), high-performance liquid chromatography (HPLC), size-exclusion HPLC, infrared spectroscopy (IR), supercritical fluid chromatography (SFC), thin layer chromatography (TLC), ultraviolet (UV) and fluorescence spectroscopy, isotope ratio mass spectrometry, and gravimetry. Quickly and without it costing a fortune? Nah. And, you need to know how to take the sample and preserve the analyte.
The regulators and insurors will be on this like gravy on rice. Suggest you report the incident to your insuror and let them do the lifting.