Tea Testing

Tea refers to the leaves and buds of the tea tree. The ingredients of tea include catechins, cholesterol, caffeine, inositol, folic acid, and pantothenic acid, which are beneficial to health. Tea beverages made from tea leaves are one of the three major beverages in the world. Tea testing is an important method to evaluate the quality of tea. Tea testing can test the quality of tea from many aspects such as the production process, tea color, aroma, additives, and storage methods.

STEMart provides comprehensive tea testing service to detect various indicators of tea, and determine the quality, safety and storage conditions of tea.

Test Samples

Green tea, yellow tea, oolong tea, black tea, dark tea, white tea, etc.

Standard Tests

Physical and Chemical Composition Testing

• Powder
• Broken tea
• Moisture
• Ash
• Water extract
• Crude fiber
• Caffeine
• Tea polyphenols
• Catechins
• Free amino acids
• Theanine
• Theaflavins
• Chlorophyll
• Sulfur dioxide
• Tea stems
• Non-tea inclusions
• Solubility
• Close packing density
• Free flow packing density
• Particle size

Pesticide Residue Detection

• DDT
• Dicofol
• Fenvalerate
• Bifenthrin
• Fenpropathrin
• Cypermethrin
• Endosulfan
• Cyfluthrin
• Flumethrin
• Permethrin
• Deltamethrin
• S421
• Cis-cypermethrin pyrethrin
• Cyhalothrin

Microorganism Detection

• Mold and yeast
• Total number of colonies
• Coliforms
• Coronocystis

Nutrient Detection

• Iron
• Potassium
• Calcium
• Sodium
• Magnesium
• Manganese
• Selenium
• Zinc
• Phosphorus
• Sulfur
• Aluminum

Pollutant Detection

• Lead
• Copper
• Chromium
• Cadmium
• Sulfur dioxide
• Anthraquinone
• Perchlorate

Sensory Testing

• Appearance: shape, tenderness, color, evenness, clarity
• Soup color
• Aroma
• Taste
• Bottom of leaf

Pigment Detection

• Lemon yellow
• Amaranth
• Carmine
• Sunset yellow
• Bright blue
• Erythrosine

For more information about our tea testing services, please contact us.