|
US$199.00 · In stock
Delivery: <= 2 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 8304-2013: Tea -- Determination of moisture content
Status: Obsolete GB/T 8304: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 8304-2013 | English | 199 |
Add to Cart
|
2 days [Need to translate]
|
Tea -- Determination of moisture content
| Obsolete |
GB/T 8304-2013
|
| GB/T 8304-2002 | English | 239 |
Add to Cart
|
2 days [Need to translate]
|
Tea -- Determination of moisture content
| Obsolete |
GB/T 8304-2002
|
| GB/T 8304-1987 | English | 199 |
Add to Cart
|
2 days [Need to translate]
|
Tea--Determination of moisture content
| Obsolete |
GB/T 8304-1987
|
PDF similar to GB/T 8304-2013
Basic data | Standard ID | GB/T 8304-2013 (GB/T8304-2013) | | Description (Translated English) | Tea -- Determination of moisture content | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | X04 | | Classification of International Standard | 67.140.10 | | Word Count Estimation | 5,514 | | Older Standard (superseded by this standard) | GB/T 8304-2002 | | Quoted Standard | GB/T 8302; GB/T 8303 | | Adopted Standard | ISO 1573-1980, MOD | | Regulation (derived from) |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 moisture content in tea instruments and appliances, methods, procedures and results of calculations determined. This standard applies to the determination of moisture in tea. | GB/T 8304-2013: Tea -- Determination of moisture 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 moisture content
ICS 67.140.10
X04
National Standards of People's Republic of China
Replacing GB/T 8304-2002
Tea sub-Determination
(ISO 1573. 1980, Tea-Determinationoflossinmassat103 ℃, 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 8304-2002 "Determination of tea points." This standard compared with GB/T 8304-2002, the main technical change
as follows.
--- The principle of the principles of moisture determination made appropriate complementary;
--- Instruments and appliances added to the sample container, quality glass baking dish;
--- Repeatability. the difference between the two measurement results, moisture per 100g sample should not exceed 0.2g, modified to repeat the same conditions under
The absolute difference between the measurement results of the sample must not exceed 5% of the arithmetic mean.
This standard uses redrafted law revision using ISO 1573. 1980 "Tea at 103 ℃ Determination of mass loss." This standard and ISO
1573. 1980 compared to the main technical differences are as follows.
--- Modify using ISO 1573. 1980 as the first law of this standard;
--- Increased 120 ℃ drying method (rapid method) as the second law of this standard;
--- Measured in the sample drying time constant weight in water method 103 ℃ ± 2 ℃ modified to 4h from 6h;
--- Repeatability. the difference between the two measurement results, moisture per 100g sample should not exceed 0.3g, modified to repeat the same conditions under
The absolute difference between the measurement results of the sample must not exceed 5% of the arithmetic mean;
--- Remove the ISO 1573. 1980, Chapter 9 test reports;
--- Remove the drying process considerations.
This standard also made the following editorial changes.
--- Remove the ISO 1573. 1980 Foreword;
--- Remove the ISO 1573. 1980 introduction.
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, Xiamen Huaxiang
Garden Tea Co., Ltd..
The main drafters of this standard. Wang Jin, Zhou Weilong, Xiao Wenhua, Sha Tao, Wang Haibin, Xu Jianfeng, Lu Xiaolei.
The previous versions of GB/T 8304 release of case.
--- GB/T 8304-1987, GB/T 8304-2002.
Tea sub-Determination
1 Scope
This standard specifies the tea moisture determination instruments and appliances, and the result of the calculation method step measurement.
This standard applies to the determination of tea water.
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
Water moisturecontent
Under atmospheric conditions, the sample was heated to a predetermined temperature by the mass loss of the constant weight.
Principle 4
Samples at 103 ℃ ± 2 ℃ in electric oven heated to a constant weight, weigh, and calculate the mass loss of the samples is water.
5 instruments and appliances
5.1 Sample container. the clean, dry, dark, airtight glass or other material does not react with the sample prepared; the size to be able to fill mill
Crushed sample is appropriate.
5.2 Quality aluminum or glass baking dish. a cover, an inner diameter of 75mm ~ 80mm.
5.3 blast electric oven. temperature 103 ℃ ± 2 ℃.
5.4 dryer. containing more effective desiccant.
5.5 Analysis of balance. a sense of the amount of 0.001g.
6 Operation
6.1 Sampling
According to the provisions of GB/T 8302 sampling.
Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 8304-2013_English be delivered?Answer: Upon your order, we will start to translate GB/T 8304-2013_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 2 working days. The lengthier the document the longer the lead time. Question 2: Can I share the purchased PDF of GB/T 8304-2013_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 8304-2013_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to [email protected]. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay. Question 5: Should I purchase the latest version GB/T 8304-2013?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 8304-2013 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.
|