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GB/T 8306-2013: Tea -- Determination of total ash content
Status: Obsolete GB/T 8306: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 8306-2013 | English | 199 |
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Tea -- Determination of total ash content
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GB/T 8306-2013
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| GB/T 8306-2002 | English | 239 |
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Tea -- Determination of total ash content
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GB/T 8306-2002
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| GB/T 8306-1987 | English | 199 |
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Tea--Determination of total ash content
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GB/T 8306-1987
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PDF similar to GB/T 8306-2013
Basic data | Standard ID | GB/T 8306-2013 (GB/T8306-2013) | | Description (Translated English) | Tea -- Determination of total ash content | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | X04 | | Classification of International Standard | 67.140.10 | | Word Count Estimation | 5,593 | | Older Standard (superseded by this standard) | GB/T 8306-2002 | | Quoted Standard | GB/T 8302; GB/T 8303 | | Adopted Standard | ISO 1575-1987, MOD | | Regulation (derived from) | National Standards Bulletin 2013 No. 27 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the determination of total ash tea apparatus and appliances, and the results of the calculation method for the determination step. This standard applies to the determination of total ash tea. | GB/T 8306-2013: Tea -- Determination of total ash content---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Tea. Determination of total ash content
ICS 67.140.10
X04
National Standards of People's Republic of China
Replacing GB/T 8306-2002
Tea determination of total ash
(ISO 1575. 1987, Tea-Determinationoftotalash, MOD)
Issued on. 2013-12-31
2014-06-22 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard replaces GB/T 8306-2002 "Determination of total ash tea." This standard compared with GB/T 8306-2002, the main technical change
Of the following.
--- Twice the difference between the measurement results, total ash per 100g sample should not exceed 0.2g, modified to repeat the same sample under conditions
The absolute difference between the measurement results obtained shall not exceed 5% of the arithmetic mean.
This standard uses redrafted law revision using ISO 1575. 1987 "Tea Determination of total ash." This standard and ISO 1575. 1987 Phase
Ratio, the main technical differences are as follows.
--- 5g sample quality measurement modify 2g, ashing process does not add vegetable oil;
--- Repeatability. the difference between the two measurement results, total ash per 100g sample should not exceed 0.2g, modified to duplicate the conditions hereinafter
A sample assay results obtained absolute difference shall not exceed 5% of the arithmetic mean;
--- The International Standard amend Chapter 6 of this standard sample 6.1 sampling;
--- Remove the ISO 1573. 1980 Chapter 9 test reports.
This standard also made the following editorial changes.
--- Remove the ISO 1573. 1980 Foreword.
The standard proposed by China Federation of Supply and Marketing Cooperatives.
This standard by the National Standardization Technical Committee of tea (SAC/TC339) centralized.
This standard was drafted. China Federation of Supply and Marketing Cooperatives Hangzhou Tea Research Institute, the National Tea Quality Supervision and Inspection Center.
The main drafters of this standard. Zhou Weilong, Xu Jianfeng, Lu Xiaolei, Wang Jin, Sha Tao.
GB/T 8306 release of the previous version of the case.
--- GB/T 8306-1987, GB/T 8306-2002.
Tea determination of total ash
1 Scope
This standard specifies the determination of total ash tea equipment and appliances, procedures and results of the calculation method for the determination.
This standard applies to the determination of total ash tea.
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 (GB/T 8302-2013, ISO 1839. 1980, NEQ)
GB/T 8303 Tea grated dry matter content of the sample preparation and measurement (GB/T 8303-2013, ISO 1572. 1980,
MOD)
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Total ash totalash
Under specified conditions, the tea after 525 ℃ ± 25 ℃ burning ashing residue obtained after.
Principle 4
The sample was 525 ℃ ± 25 ℃ heating burning, decomposition of organic matter to the constant.
5 apparatus and appliances
5.1 Crucible. Platinum porcelain or other conditions will not be affected by the determination of the material. High type, capacity 30mL.
5.2 Electric hot plate.
5.3 high-temperature furnace. temperature can be 525 ℃ ± 25 ℃.
5.4 dryer. containing more effective desiccant.
5.5 crucible tongs.
5.6 Analysis of balance. a sense of the amount of 0.001g.
6 measuring step
6.1 Sampling
According to the provisions of GB/T 8302's.
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