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GB/T 8311-2013Tea—Determination of dust and broken content (English PDF)

茶粉末和碎茶含量测定

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

December 31, 2013

Implementation date

June 22, 2014

Scope

GB/T 8311-2013 is the English-translated version of 茶粉末和碎茶含量测定.

GB/T 8311-2013 is the Chinese standard "Tea—Determination of dust and broken content". Its scope clause reads: This standard specifies the tea powder and broken tea content measurement instruments and appliances, sample preparation, methods of operation and the results of calculations and test Inspection reports.

This standard applies to the determination of tea powder and broken tea content. Its clauses include terms and definitions; apparatus and appliances; sample preparation.

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Document preview — GB/T 8311-2013

National Standard of the People's Republic of China

ICS: 67.140.10
Classification: X 55
Replacing: GB/T 8311-2002

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

1 Scope
2 Normative references
3 Terms and Definitions
4 apparatus and appliances
5 Sample Preparation

1 Scope

This standard specifies the tea powder and broken tea content measurement instruments and appliances, sample preparation, methods of operation and the results of calculations and test

Inspection reports.

This standard applies to the determination of tea powder and broken tea content.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein

Member. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 8302 sampling tea

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 Powder and broken tea

According to certain rules, with a predetermined speed and aperture sieve, screening a variety of tea in the sample under the sieve.

4 apparatus and appliances

4.1 sampler and sub-sub-template or sample plate

plate 2 Corner opened a gap.

4.2 Electric Screen

speed 200r/min ± 10r/min, swirling amplitude 60mm ± 3mm.

4.3 Inspection screen

copper braid square hole sieve, sieve diameter 200mm, with the bottom screen and the screen cover.

4.3.1

Powder Sieve.

a) aperture 0.63mm (for bars, round tea);

b) aperture 0.45mm (for tea and coarse fractal shaped tea);

c) aperture 0.23mm (for sheet-shaped tea);

d) aperture 0.18mm (used at the end shaped tea).

4.3.2

broken tea sieve.

a) aperture 1.25mm (for bars, round tea);

b) aperture 1.60mm (for coarse-shaped tea).

Note 1. The article, refers to a circular tea time tea, Souchong tea, the broken black leaf tea, Roasted, Hongqing, Gunpowder and other tight end strip, round tea.

Note 2. The crude shaped tea Tieguanyin means, color species, narcissus, white peony, tribute eyebrow, drying green, Pu'er tea, thick, loose tea form.

5 Sample Preparation

5.1 Sampling

According to the provisions of GB/T 8302 sampling.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

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Editions of GB/T 8311

Edition	Title	Revision	Status
GB/T 8311-2013	Tea—Determination of dust and broken content	current edition	Current
GB/T 8311-2002	Tea—Determination of dust and broken content	previous edition	Superseded

This page sells the current edition, GB/T 8311-2013. Earlier editions are listed for reference only.

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