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Instant tea in solid form -- Part 3: Determination of moisture content
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GB/T 18798.3-2008
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Instant tea in solid from -- Determination of moisture content
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Basic data Standard ID | GB/T 18798.3-2008 (GB/T18798.3-2008) | Description (Translated English) | Instant tea in solid form -- Part 3: Determination of moisture content | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | X55 | Classification of International Standard | 67.140.10 | Word Count Estimation | 5,587 | Date of Issue | 2008-08-12 | Date of Implementation | 2009-03-01 | Older Standard (superseded by this standard) | GB/T 18798.3-2002 | Quoted Standard | GB/T 18798.1 | Adopted Standard | ISO 7513-1990, MOD | Regulation (derived from) | National Standard Approval Announcement 2008 No.14 (Total No.127) | 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 provides for the principle of instant tea in solid moisture determination, operating methods and results calculation methods, instruments and appliances. This section applies to the determination of moisture solid instant tea. |
GB/T 18798.3-2008: Instant tea in solid form -- Part 3: 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.
Instant tea in solid form Part 3. Determination of moisture content
ICS 67.140.10
X55
National Standards of People's Republic of China
Replacing GB/T 18798.3-2002
Solid instant tea
Part 3. Moisture
[ISO 7513.1990, Instantteainsolidform-
Determinationofmoisturecontent (lossinmassat103degreesC), MOD]
Posted 2008-08-12
2009-03-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 18798 "solid instant tea" is divided into the following sections.
--- Part 1. Sampling;
--- Part 2. Determination of total ash;
--- Part 3. Determination of moisture content;
This section GB/T 18798 Part 3, ISO 7513 corresponds to.1990 "Moisture solid instant tea."
The partial modification of the use of ISO 7513.1990.
This part of ISO 7513 in the main technical content. the same as 1990, in the preparation of rules GB/T 1.1-2000 "Standardization according to
Working Guidelines Part 1. Standard structure and drafting of rules "were developed.
This section important technical indicators and ISO 7513.1990 same, but in the specific preparation of the content, format and ISO 7513.1990 in the presence of
Column Differences.
--- Delete ISO 7513.1990 Chapter 3, "principle" of the two "Note";
--- Delete ISO 7513.1990 Chapter 5, "sampling" in the "note", the note of the contents included in the sample;
--- Increase the "definition" of Chapter 3;
--- Combined ISO 7513.1990 Chapter 7 "sample weighing 7.2" and "following the determination" for the measuring step, and delete "7.4 Determination
frequency";
--- For ease of calculation, the ISO 7513.1990 Chapter 8, "formula" in the m1 and m1 2 plus Lvhe quality;
--- Delete ISO 7513.1990 in 9.1 "repetitive" in the moisture limit of 3% to 4%, this index and China's production of solid-state speed
Soluble tea sub-match;
--- Delete ISO 7513.1990 in 9.2;
--- Delete ISO 7513.1990 Chapter 10, "test report";
--- The ISO 7513.1990 Chapter 7, "Sample Preparation" later chapters on the analysis of the operation, unified included in Chapter 6, "Operation Party
Law "within.
This Part replaces GB/T 18798.3-2002 "Moisture solid instant tea."
This part is proposed by the China Federation of Supply and Marketing Cooperatives.
This part of the National Standardization Technical Committee under the jurisdiction of tea.
This section was drafted by. China Federation of Supply and Marketing Cooperatives Hangzhou Tea Research Institute.
The main drafters of this section. Zhou Weilong, Xu Jianfeng, Xu Ling, Sha Tao, Huang Hao, painted Yunfei.
This part of the standard replaces the previous editions are.
--- GB/T 18798.3-2002.
Solid instant tea
Part 3. Moisture
1 Scope
This section GB/T 18798 specifies the principles of moisture determination in solid instant tea, apparatus and appliances, and the result of the calculation method of operation
method.
This section applies to the determination of moisture solid instant tea.
2 Normative references
The following documents contain provisions which, through reference GB/T 18798 in this section constitute provisions of this section. For dated reference documents
Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this
section.
GB/T 18798.1 solid instant tea - Part 1. Sampling (GB/T 18798.1-2008, ISO 7516. 1984, IDT)
3 Terms and Definitions
The following terms and definitions apply GB/T 18798 in this section.
3.1
Sample at a temperature of 103 ℃, the mass loss was heated for 2h.
Principle 4
The sample is heated to remove moisture 2h at 103 ℃ ± 2 ℃ constant temperature oven, weighed.
5 apparatus and appliances
Conventional laboratory equipment and the following.
5.1 blast oven temperature. it can automatically control the temperature of 103 ℃ ± 2 ℃.
5.2 aluminum baking pan. with cover, diameter 75mm ~ 80mm.
5.3 dryer. containing more effective desiccant.
5.4 Analysis of balance. a sense of the amount of 0.001g.
6 Operation
6.1 Sampling
According to GB/T 18798.1 provisions sampling. Timely determination after sampling.
6.2 Sample Preparation
The sealed container containing a solid instant tea samples shaking, reverse, sample is completely mixed.
6.3 aluminum baking dish ready
Cover baking dish along with the dish (5.2) placed in the oven 103 ℃ ± 2 ℃ of (5.1) and heated 1h, stamped out, the dryer (5.3) in
Cooling to room temperature, weigh (accurate to 0.001g).
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