This cartridge is designed on the base of the national standard "GB/T23204-2008 Determination of 519 Pesticides and Related Chemicals Residues in Tea- Gas Chromatography-Mass Spectrometry" and (GB/T 23205-2008 Determination of448 Pesticides and Related Chemicals Residues in Tea by Liquid ChromatographyTandem Mass Spectrometry). It can effectively remove organic acids,carbohydrates,pigments, tea polyphenols and other impurities in tea, achieve excellent purificationeffect, and has a high recovery rate and good reproducibility results for organophos-phorus, organic oxygen, pyrethroids, carbamates and other pesticide residues in tea.