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Main content:
1. What is tea and how to evaluate its quality?
2. Standards apply to tea products.
3. Services that Vinacontrol provides for tea products.
4. Organic agriculture certification service: organic tea.
1. What is tea and how to evaluate its quality?
Tea (or tea) is the second most popular beverage in the world (after drinking water). prepared by soaking the leaves, buds, or branches of the tea plant in boiling water for a few minutes to several hours. Tea leaves can be oxidized (fermented), roasted, dried, or mixed with other herbs such as flowers, spices, or other fruits before being added to boiling water.
The quality of green tea is often assessed visually by Vinacontrol's skilled tea tasters based on judgments, experience and understanding of the conditions of the production area and the tastes of the consuming country. Evaluation can be through characteristics such as the appearance of the tea before preparing the tea (such as shape, color, cleanliness and uniformity), the appearance of the brewed leaves and the appearance, smell, and taste of the tea. tea. In practice, tea is only considered for chemical analysis if there is a specific request from the customer or if Vinacontrol's cupping experts suspect the product is contaminated with impurities or if unusual characteristics appear.
2. Standards apply to tea products:
- TCVN 9740:2013 (ISO 11287:2011) on Green Tea - Definition and basic requirements
- TCVN 3218:2012, Tea - Determination of sensory criteria by scoring method
- TCVN 5084 (ISO 1576), Tea – Determination of soluble and insoluble ash in water
- TCVN 5085 (ISO 1578), Tea – Determination of alkalinity of ash dissolved in water
- TCVN 5103 (ISO 5498), Agricultural and food products – Determination of crude fiber content – General method
- TCVN 5609 (ISO 1839), Tea – Sampling
- TCVN 5610 (ISO 9768), Tea – Determination of extract content in water
- TCVN 5611 (ISO 1575), Tea – Determination of total ash
- TCVN 5612 (ISO 1577), Tea – Determination of acid-insoluble ash
- TCVN 5613 (ISO 1573), Tea – Determination of mass loss at 103 oC
- TCVN 5714 (ISO 15598), Tea – Determination of crude fiber content
- TCVN 9738 (ISO 1572), Tea – Preparation of ground samples and determination of dry matter content
- TCVN 9745-1 (ISO 14502-1), Tea – Determination of characteristic substances of green tea and black tea – Part 1: Total polyphenol content in tea – Colorimetric method using Folin reagent – Ciocalteu
- TCVN 9745-2 (ISO 14502-2), Tea – Determination of characteristic substances of green tea and black tea – Part 2: Catechin content in green tea – High performance liquid chromatography method
3. Services that Vinacontrol provides for tea products.
- Packaging inspection, marking,
- Quantity assessment through table weighing method,
- Sensory assessment of tea,
- Quality assessment:
- Common criteria: Water extractable, Total ash, Water-soluble ash, Alkalinity of water-soluble ash, Acid-insoluble ash, Crude fiber, Total catechins, Total polyphenols.
- Additional criteria: Fenvalerate, Cypermethrin, Buprofezin, Triazophos, Paraquat, Acetamiprid, Immidachloprit, Radiation, radioactive Cs137.
- Metal indicators: Arsenic, Cadmium, lead, copper, iron, zinc, mercury...
- Microbiological indicators: Coliforms, E.coli, Salmonella, mold - fungal toxins (Aflatoxin B1&B2, G1&G2).
With a team of experienced inspectors and analysts with specialized qualifications for tea products and a testing laboratory system invested in modern equipment, meeting national testing standards (VILAS) , in accordance with ISO/IEC 17025 standards, Vinacontrol is committed to providing customers with accurate, objective, timely tea inspection and testing results at a reasonable cost and satisfying customers' legitimate requirements. row.
4. Organic agriculture certification service: organic tea
Organic agriculture is increasingly playing an important role in our country's comprehensive agricultural production system, and has been receiving attention and direction from the Government. Vinacontrol is the unit directly designated to participate in the Organic Agriculture Development Project for the period 2020-2030, certifying Vinacontrol's organic agricultural products including evaluation and certification of organic agricultural products. The engine is manufactured in accordance with national standards (TCVN 11041), ensuring harmony with international standards. With its capacity and brand reputation, Vinacontrol always accompanies the development of Vietnam's organic product market. Part 6 of TCVN 11041 has very clear regulations on how manufacturers can achieve certification for organic tea. With experience gained from actual assessments, Vinacontrol experts will help you accurately assess whether your tea products meet organic standards or not, thereby providing advice and consultation. suitable to increasingly improve the quality of tea products.
Contact Vinacontrol immediately for advice: (+84) 24 3943 3840
