In the situation of substances with minimal concentrations in biological content, liquid or gasoline chromatography with tandem mass spectrometry techniques have the required sensitivity. In the talked over case, a liquid chromatograph using a triple quadrupole mass spectrometer running in several reaction checking (MRM) manner was useful for NPS screening. https://5fmdmb220145678.blazingblog.com/30804322/a-review-of-5f-mdmb-2201