Tea, as a unique food and beverage in China, ranks first in the world in terms of its output and consumption. Tea categories are mainly divided into green tea, black tea, oolong tea, white tea, yellow tea, dark tea and reprocessed scented tea, compressed tea, teabag and other tea products.

Tea quality safety involves pesticide residues, heavy metal pollution, mold deterioration, illegal additions by undesirable businesses, contamination by foreign matters and so on, which may occur in tea planting, processing, transportation and storage. Among them, the phenomenon of pesticide residues is particularly prominent. Whether it is for national supervision and casual inspection or export to the European Union, the United States and other countries, the problem of excessive pesticide residues in tea will always be notified, especially some highly frequently used pesticides, such as imidacloprid and isocarbophos, glyphosate, acetamiprid, anthraquinone, tolfenpyrad, etc.

There are many types of tea. The main product standards related to tea are Green Tea (GB/T 14456), Black Tea (GB/T 13738), Oolong Tea (GB/T 30357), White Tea (GB/T 22291), Yellow Tea (GB/T 21726), Dark Tea (GB/T 32719), Pressed Tea (GB/T 9833), Tea Bag (GB/T 24690), Jasmine Tea (GB/T 22292), etc.

In addition, Maximum Residue Limits of Pesticides in Food (GB 2763) has reached 65 items with limited value requirements for pesticide residues in tea; EU Pesticide Residue Regulation EC No. 396/2005 has reached nearly 500 items with limited value requirements for pesticide residues in tea, and the items without the maximum residue limited value requirements shall not exceed 0.01mg/kg.

The Food and Agriculture Division of Ti Testing and Certification Group can provide comprehensive and professional testing services for tea products. The testing categories and parameters include the following:

Types	Test items/standards
Type Insepection Testing	Pressed Tea (GB/T 9833), Bag Tea (GB/T 24690), Green Tea (GB/T 14456), Black Tea (GB/T 13738), Oolong Tea (GB/T 30357), etc.
Sensory testing	Appearance, color, soup color, aroma, taste, etc.
Physical and chemical indicators	Moisture, ash, tea stalks, powder, water extract, crude fiber, etc.
Heavy metal pollutants	Lead, arsenic, mercury, cadmium, chromium, rare earth elements, etc.
Pesticide residues	208 package of plant-derived matrix, 106 items of GB 2763-tea agricultural residues, 100 items of TEA Eu packages, 48 items of Moroccan tea agricultural residues monitoring package, 20 items of compulsory universal package of organic product certification (tea) sampling testing, plant-derived matrix 471 package, etc
Microorganisms	Mold, yeast, pathogenic bacteria, etc.
Nutrients	Minerals, amino acids, vitamins, etc.
Food additives and illegal additives	Bleaching agent, coloring and non-edible coloring, etc.
Others	Label audit of pre-packaged tea product, mycotoxins, etc.