In the case of substances with reduced concentrations in biological materials, liquid or gas chromatography with tandem mass spectrometry procedures have the mandatory sensitivity. Inside the reviewed case, a liquid chromatograph by using a triple quadrupole mass spectrometer functioning in multiple reaction monitoring (MRM) method was employed for NPS screening. https://emilionetjy.jiliblog.com/87907153/about-5f-mdmb-2201