GB/T 8310-2013 English PDF

US$139.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 8310-2013: Tea -- Determination of crude fibre content
Status: Valid

GB/T 8310: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 8310-2013	139	Add to Cart	3 days	Tea -- Determination of crude fibre content	Valid
GB/T 8310-2002	199	Add to Cart	2 days	Tea -- Determination of crude fibre content	Obsolete
GB/T 8310-1987	199	Add to Cart	2 days	Tea--Determination of crude fibre content	Obsolete

Similar standards

GB 7718   GB 7718   GB/T 5534   GB/T 8303   GB/T 8305   GB/T 8302   

Basic data

Standard ID: GB/T 8310-2013 (GB/T8310-2013)
Description (Translated English): Tea -- Determination of crude fibre content
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: X04
Classification of International Standard: 67.140.10
Word Count Estimation: 6,669
Older Standard (superseded by this standard): GB/T 8310-2002
Quoted Standard: GB/T 8302; GB/T 8303
Adopted Standard: ISO 15598-1999, 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 crude fiber in tea reagents and solutions, apparatus and appliances, and the result of the calculation method for the determination of step. This standard applies to the determination of crude fiber in tea.

GB/T 8310-2013: Tea -- Determination of crude fibre 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 crude fibre content ICS 67.140.10 X04 National Standards of People's Republic of China Replacing GB/T 8310-2002 Tea crude fiber determination 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 8310-2002 "Determination of crude fiber tea." This standard compared with GB/T 8310-2002, the main technical change Of the following. --- Preparation methods increased 1.25% sulfuric acid solution; --- Preparation methods increased 1% hydrochloric acid solution; --- Repeatability. the difference between the results of two determinations, crude fiber per 100g sample should not exceed 0.5g, modified to duplicate the conditions hereinafter A sample assay results obtained absolute difference shall not exceed 5% of the arithmetic mean. This standard uses redrafted Law Amendment uses ISO 15598.1999 "Tea crude fiber determination." This standard and ISO 15598.1999 Compared to the main technical differences are as follows. --- Ash-free filter paper modify pore size 50μm (equivalent to 300 mesh) nylon cloth; --- Blast electric oven. 103 ℃ ± 2 ℃ modify blast electric oven. 120 ℃ ± 2 ℃; high temperature furnace. 550 ℃ ± 10 ℃ amended as high-temperature furnace. 525 ℃ ± 25 ℃; --- Remove the ISO 15598.1999 Chapter 11 accuracy; --- Remove the ISO 15598.1999 Chapter 3 grouping and definitions; --- Remove the ISO 15598.1999 Chapter 12 lab report. This standard also made the following structural modifications. --- The ISO 15598.1999 Sampling Chapter 7, Chapter 8 samples were prepared, measured steps to modify Chapter 9 of this standard 6.1, respectively, 6.2, 6.3. This standard also made the following editorial changes. --- Remove the ISO 15598.1999 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 8310 release of the previous version of the case. --- GB/T 8310-1987, GB/T 8310-2002. Tea crude fiber determination

1 Scope

This standard specifies the tea crude fiber assay reagents and solutions, apparatus and appliances, measurement methods, procedures and results calculation. This standard applies to the determination of crude fiber in 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) Principle 3 With a certain concentration of acid, alkali digestion sample, and then the ash residue weighed. Crude fiber content calculated from the mass loss during ashing.

4 apparatus and appliances

4.1 Analysis of balance. a sense of the amount of 0.001g. 4.2 Nylon. aperture 50μm (equivalent to 300 mesh). 4.3 quality sand core glass crucible. an average pore diameter of 80μm ~ 160μm, volume 30mL. 4.4 Furnace temperature. 525 ℃ ± 25 ℃. 4.5 blast electric oven. temperature 120 ℃ ± 2 ℃. 4.6 dryer. containing more effective desiccant.

5 Reagents and solutions

5.1 Unless otherwise indicated, the methods used were of analytical grade reagents (AR), distilled water. 5.2 1.25% solution of sulfuric acid. lessons 6.9mL of concentrated sulfuric acid (density 1.84g/mL, mass fraction of 98.3%), a small amount of water was added slowly After cooled, the volume to 1L, shake. 5.3 1.25% sodium hydroxide solution. 5.4 volume fraction of 1% hydrochloric acid solution. take 10mL of concentrated hydrochloric acid (density of 1.18g/mL, mass fraction of 37.5%), add water to 1L, shake. 5.5 Ethanol (95%). 5.6 acetone. ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 8310-2013_English be delivered?

Answer: Upon your order, we will start to translate GB/T 8310-2013_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 8310-2013_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 8310-2013_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+ countries

Question 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 Sales@ChineseStandard.net. 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 8310-2013?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 8310-2013 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.