Tea is a traditional bulk export of agricultural products in China. In recent years, questions about the quality and safety of tea have often been exposed. Most of the current pesticide residue analysis methods are proposed for fruits, vegetables, grains and other samples. The lack of pesticide residue detection methods and new sample preparation techniques in tea is difficult to meet the needs of international trade. The composition of tea is very complex and pre-processing. The difficulty is higher. In order to meet the market demand, a solid phase extraction column specially designed for the detection of pesticide residues in tea --- Cleanert TPT (Tea Special) SPE column was specially designed
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