GB/T 462-2023 PDF English
US$245.00 · In stock · Download in 9 secondsGB/T 462-2023: Paper, board and pulps - Determination of moisture content of analytical sample Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 462: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 462-2023 | English | 245 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Paper, board and pulps - Determination of moisture content of analytical sample
| Valid |
| GB/T 462-2008 | English | 120 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Paper, board and pulp -- Determination of moisture content of analytical sample
| Obsolete |
| GB/T 462-2003 | English | 439 |
Add to Cart
|
4 days
|
Paper and board -- Determination of moisture content
| Obsolete |
| GB/T 462-1989 | English | 199 |
Add to Cart
|
2 days
|
Paper and board--Determination of moisture content
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 462-2023
GB/T 462-2023: Paper, board and pulps - Determination of moisture content of analytical sample---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT462-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 85.040; 85.060
CCS Y 30
Replacing GB/T 462-2008
Paper, Board and Pulps – Determination of Moisture
Content of Analytical Sample
(ISO 287.2017, Paper and Board – Determination of Moisture Content of a Lot –
Oven-Drying Method; ISO 638-1.2022, Paper, Board, Pulps and Cellulosic
Nanomaterials – Determination of Dry Matter Content by Oven-Drying Method –
Part 1.Materials in Solid Form; ISO 638-2.2022, Paper, Board, Pulps and Cellulosic
Nanomaterials – Determination of Dry Matter Content by Oven-Drying Method –
Part 2.Suspensions of Cellulosic Nanomaterials, MOD)
Issued on. SEPTEMBER 7, 2023
Implemented on. APRIL 1, 2024
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 6
2 Normative References... 6
3 Terms and Definitions... 6
4 Principle... 8
5 Apparatus... 8
6 Container Preparation... 8
7 Sampling... 8
8 Preparation of Specimen... 9
9 Test Procedures... 10
10 Calculation of Results... 11
11 Test Report... 12
Appendix A (Informative) Comparison of Structure Numbers between This
Document and International Standards... 13
Bibliography... 16
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1.Rules for the Structure and Drafting of Standardizing Documents.
This Document replaced GB/T 462-2008 Paper, Board and Pulp - Determination of Moisture
Content of Analytical Sample. Compared with GB/T 462-2008, the major technical changes of
this Document are as follows besides the structural adjustments and editorial modifications.
a) Change the Scope and add the content of cellulose nanomaterial (see Clause 1 of this
Edition; Clause 1 of the 2008 Edition);
b) Add the definitions of nanoscale, cellulose nanomaterial and dry matter content (see 3.1,
3.2 and 3.5 of this Edition);
c) Change the definition of constant mass (see 3.3 of this Edition; 3.2 of the 2008 Edition);
d) Change the requirements for the graduation value of the balance (see 5.1 of this Edition;
5.1 of the 2008 Edition);
e) Change the content and expression of sampling (see Clause 7 of this Edition; Clause 7 of
the 2008 Edition);
f) Add preparation of specimen (see Clause 8 of this Edition);
g) Change the test procedures (see 9.1.1 of this Edition; 8.2 of the 2008 Edition);
h) Add the test procedures for suspensions of cellulose nanomaterials (see 9.2 of this
Edition);
i) Add the calculation of dry matter content (see 10.2 of this Edition);
j) Change the test report (see Clause 11 of this Edition; Clause 10 of the 2008 Edition).
This Document modified and adopted ISO 287.2017 Paper and Board – Determination of
Moisture Content of a Lot – Oven-Drying Method; ISO 638-1.2022 Paper, Board, Pulps and
Cellulosic Nanomaterials – Determination of Dry Matter Content by Oven-Drying Method –
Part 1.Materials in Solid Form; ISO 638-2.2022 Paper, Board, Pulps and Cellulosic
Nanomaterials – Determination of Dry Matter Content by Oven-Drying Method – Part 2.
Suspensions of Cellulosic Nanomaterials.
Compared with ISO 287.2017, ISO 638-1.2022 and ISO 638-2.2022, this Document had more
structural adjustments. The comparison list of change in structure numbers of the 4 documents
can refer to Appendix A.
The technical differences and causes between this Document and ISO 287.2017, ISO 638-
1.2022 and ISO 638-2.2022 are as follows.
a) Change the Scope (see Clause 1 of this Document) to comply with the drafting rules of
China's standardization documents;
b) Change the definition of constant mass (see 3.3 of this Document) to correspond to the
content in the test procedures;
c) Replace ISO 186 (see 7.1 of this Document) by the normative reference GB/T 450 to
adapt to China's technical conditions;
d) Replace ISO 7213 (see 7.1 of this Document) by the normative reference GB/T 740 to
adapt to China's technical conditions;
e) Change the preparation method of specimen (see Clause 8 of this Document); and
simplify the content of Clause 8 of ISO 287.2017 to make the standard content easier to
operate and adapt to China's national conditions;
f) Delete the Clause 10 of ISO 638-1.2022 and ISO 638-2.2022.
This Document made the following editorial modifications.
--- Delete Appendix A (Informative) of ISO 287.2017; and Appendixes A (Informative) and
B (Informative) of ISO 638-1.2022 and ISO 638-2.2022.
Please note some contents of this Document may involve patents. The issuing agency of this
Document shall not assume the responsibility to identify these patents.
This Document was proposed by China National Light Industry Council.
This Document shall be under the jurisdiction of National Technical Committee on
Papermaking Industry of Standardization Administration of China (SAC/TC 141).
Drafting organizations of this Document. Zhejiang Guoli Packaging Co., Ltd.; Kingdecor
(Zhejiang) Co., Ltd.; China National Pulp and Paper Research Institute Co., Ltd.; Sinolight
Paper Inspection & Certification Co., Ltd.; Sinolight (Jinjiang) Hygiene Products Research Co.,
Ltd.; Idifubei (Chongqing) Technology Co., Ltd.; Shandong Bohui Paper Industrial Co., Ltd.;
Zhejiang Zhongxin Environmental Protection Technology Group Co., Ltd.; and National Paper
Product Quality Supervision Inspection Center.
Chief drafting organizations of this Document. Yuan Taojing, Lu Kesen, Lailu Nanxiang, Wang
Jin, Dai Huafen, Lian Jiaqi, Mao Dongsheng, Tiao Rongchao, Teng Bubin, Zhang Meng, and
Wang Xinting.
The historical editions replaced by this Document are as follows.
--- GB 462-1964 Paper and Board - Determination of Moisture Content was first-time
published in 1964; first-time revised in 1979; second-time revised in 1989; third-time
revised in 2003;
--- When fourth-time revised in 2008, it combines GB/T 741-2003 Pulps - Determination of
Moisture Content (the historical editions replaced by GB/T 741-2003 included GB 741-
1965, GB/T 741-1979, and GB/T 741-1989);
--- It is fifth-time revised hereby.
Paper, Board and Pulps – Determination of Moisture
Content of Analytical Sample
WARNING. The methods specified in this Document involve the use of nanomaterials.
Care shall be taken to ensure that relevant precautions and guidelines for nanotechnology
laboratory safety and best practices are followed.
1 Scope
This Document describes the determination of the moisture content of paper, board, pulp and
cellulose nanomaterials after sampling using the oven drying method.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
3 Terms and Definitions
For the purposes of this Document, the following terms and definitions apply.
The specimen is dried at 105℃ ± 2℃ until the difference in the specimen mass in two
consecutive weighings does not exceed the specified mass fraction of the specimen before (after)
drying.
4 Principle
Weigh the masses of paper, board, pulp and cellulose nanomaterial specimens before drying,
then dry the specimens to constant mass and weigh them again. The ratio of the difference
between the mass of the specimen before and after drying to the mass before drying is the
moisture content of the specimen.
5 Apparatus
Balance. When weighing specimens of paper, board, pulp and cellulose nano materials in
solid form with a mass of less than 2 g, the graduation value is 0.1 mg; when weighing samples
of 2 g or more, the graduation value is at least 0.05% or more of the specimen mass; when
weighing specimens of suspensions of cellulose nanomaterials, the graduation value is 0.1 mg.
6 Container Preparation
Before sampling, a sufficient number of clean and dry specimen containers (5.2) shall be
numbered and balanced in the atmosphere. Use a balance (5.1) to weigh the mass of the
container and cover it until the specimen is filled.
7 Sampling
In order to avoid moisture loss, change and sample contamination, necessary measures shall
be taken when sampling. If the sampling place is warm and humid, rubber gloves should be
worn during operation. After sampling, all samples shall be immediately placed in a well-sealed
container and sealed for storage.
8 Preparation of Specimen
For recycled paper and board, 200 g~500 g of specimens shall be weighed. The specific
sampling quantity depends on the uniformity of the mixing of the recycled paper and board.
For recycled paper and paperboard with less uniform mixing, the sampling quantity can be
appropriately increased.
9 Test Procedures
The absolute error between the two measured values of moisture shall not exceed 0.4; otherwise,
repeat the parallel test.
In the parallel determination of moisture, the deviation between the measured value and average
value of dry matter content shall not exceed 2%; otherwise, a parallel test shall be repeated.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Tips & Frequently Asked QuestionsQuestion 1: How long will the true-PDF of English version of GB/T 462-2023 be delivered?Answer: The full copy PDF of English version of GB/T 462-2023 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice. Question 2: Can I share the purchased PDF of GB/T 462-2023_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 462-2023_English will be deemed to be sold to your employer/organization who actually paid 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. www.ChineseStandard.us -- GB/T 462-2023 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds. Question 5: Should I purchase the latest version GB/T 462-2023?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 462-2023 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. How to buy and download a true PDF of English version of GB/T 462-2023?A step-by-step guide to download PDF of GB/T 462-2023_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).
Step 2: Search keyword "GB/T 462-2023".
Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart.
Step 4: Select payment option (Via payment agents Stripe or PayPal).
Step 5: Customize Tax Invoice -- Fill up your email etc.
Step 6: Click "Checkout".
Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively.
Step 8: Optional -- Go to download PDF.
Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice.
See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9
|