Tea - A-Test Compliance Services Group

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Tea

Tea testing

Tea quality testing is an important method for bottle tea quality. Tea quality testing can be carried out from the production process, tea color, flavor and additives, storage methods and other aspects. For the quality evaluation of tea, there are different requirements and standards in different periods and regions. As tea has become the most widely circulated agricultural product in global trade, from producing countries to consuming countries, tea has covered the global production procedures, product and inspection method standards. Tea testing scope includes: green tea, black tea, green tea (oolong tea), white tea, yellow tea, black tea, herbal tea, other.

Test items	Detection method
green tea
Moisture	GB/T 8304-2013（The first rule）
total ash	GB/T 8306-2013
ground tea	GB/T 8311-2013
powder	GB/T 8311-2013
water extract	GB/T 8305-2013
crude fiber	GB/T 8310-2013
Acid insoluble ash	GB/T 8308-2013
water soluble ash content of total ash content	GB/T 8307-2013
water-soluble ash alkalinity	GB/T 8309-2013
black tea
Moisture	GB/T 8304-2013（The first rule）
total ash	GB/T 8306-2013
powder	GB/T 8311-2013
water extract	GB/T 8305-2013
Water soluble ash	GB/T 8307-2013
water-soluble ash alkalinity	GB/T 8309-2013
Acid insoluble ash	GB/T 8308-2013
Crude fiber	GB/T 8310-2013
Puer tea
Moisture	GB/T 8304-2013（The first rule）
total ash	GB/T 8306-2013
powder	GB/T 8311-2013
water extract	GB/T 8305-2013
Tea Polyphenols	GB/T 8313-2013
Crude fiber	GB/T 8310-2013
lead	GB 5009.12-2010
Coliform bacteria	GB/T 4789.21-2003、GB 4789.1-2010、GB4789.3-2010
Shigella	GB/T 4789.21-2003、GB 4789.1-2010、GB4789.5-2010
Staphylococcus aureus	GB/T 4789.21-2003、GB 4789.1-2010、GB4789.10-2010
Hemolytic Streptococcus	GB/T 4789.21-2003、GB 4789.11-2014