In the situation of substances with lower concentrations in biological materials, liquid or gas chromatography with tandem mass spectrometry methods have the required sensitivity. During the talked about scenario, a liquid chromatograph with a triple quadrupole mass spectrometer working in various response monitoring (MRM) mode was employed for NPS screening. https://5f-mdmb-220124456.luwebs.com/31343918/top-guidelines-of-5f-mdmb-2201