GB/T 2678.6-2023 English PDFUS$269.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 2678.6-2023: Paper, board and pulp - Determination of water-soluble sulfates Status: Valid GB/T 2678.6: Historical versions
Basic dataStandard ID: GB/T 2678.6-2023 (GB/T2678.6-2023)Description (Translated English): Paper, board and pulp - Determination of water-soluble sulfates Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: Y30 Classification of International Standard: 85.040; 85.060 Word Count Estimation: 14,122 Date of Issue: 2023-09-07 Date of Implementation: 2024-04-01 Older Standard (superseded by this standard): GB/T 2678.6-1996 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 2678.6-2023: Paper, board and pulp - Determination of water-soluble sulfates---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.ICS 85.040;85.060 CCSY30 National Standards of People's Republic of China Replace GB/T 2678.6-1996 Determination of water-soluble sulfates in paper, board and pulp (ISO 9198.2020,MOD) Published on 2023-09-07 2024-04-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee ForewordThis document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. This document replaces GB/T 2678.6-1996 "Determination of water-soluble sulfate in paper, cardboard and pulp (conductometric titration method)" and is consistent with Compared with GB/T 2678.6-1996, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) Changed the scope (see Chapter 1, Chapter 1 of the.1996 edition); b) Added terms and definitions (see Chapter 3); c) The principle of conductometric titration has been changed (see 4.1, 3.1 of the.1996 edition); d) Change "instrument" to "instrument and equipment" and refine the requirements (see 4.3, Chapter 5 of the.1996 edition); e) Changed the collection and preparation of specimens (see 4.4, Chapter 6 of the.1996 edition); f) The test procedure has been changed (see 4.5, Chapter 7 of the.1996 edition); g) The result calculation and calculation formula of the conductometric titration method have been changed, the simplified formula has been deleted, and the "moisture content w of the sample" has been added (see 4.6, Chapter 8 of the.1996 edition); h) Added ion chromatography (see Chapter 5); i) Increased precision (see Chapter 6); j) Increased detection limit (see Chapter 7). This document has been modified to adopt ISO 9198.2020 "Determination of water-soluble sulfates in paper, board and pulp". Compared with ISO 9198.2020, this document has many structural adjustments. Comparison list of structure number changes between the two files See Appendix A. The technical differences between this document and ISO 9198.2020 and their reasons are as follows. ---The scope has been changed, the detection limit has been deleted, and the conductometric titration method has been added, consistent with the technical content specified in this document. The detection limit Moved to Chapter 7 (see Chapter 1); ---The definition of terms has been changed to be consistent with the technical content specified in this document (see Chapter 3); ---Added conductometric titration to adapt to my country's technical conditions (see Chapter 4); ---Replaced ISO 186 (see 4.4) with the normatively cited GB/T 450 to adapt to my country's technical conditions; ---Replaced ISO 287 and ISO 638 (see 4.5.2) with normatively quoted GB/T 462 to adapt to my country's technical conditions; ---Replaced ISO 7213 (see 4.4) with the normatively quoted GB/T 740 to adapt to my country's technical conditions; ---Added normative reference to GB/T 6682 to adapt to my country's technical conditions; ---The principle has been changed to be consistent with the technical content specified in this document (see 5.1); ---Changed the content of instruments and equipment, added "analytical balance", "medium speed quantitative filter paper" and "erlenmeyer flask" to supplement the missing instrument equipment. Prepare and specify requirements (see 5.3); ---Changed the collection and preparation of samples to be consistent with the corresponding description in conductometric titration (see 5.4); ---The thermal extraction method is added, which is consistent with the test solution preparation method in the conductometric titration method (see 5.5.1.2); ---The rounding method of ion chromatography has been changed to be consistent with the rounding method of conductometric titration (see 5.6); ---Changed "precision", deleted Table 1, added repeatability limits, limited the repeatability of test results, and ensured test results. accuracy of results (see Chapter 6); ---Deleted the report results, added "detection limit", described the detection limits of conductometric titration and ion chromatography, and added sampling The detection limit of the method can be reduced by increasing the amount, concentrating, using more advanced instruments, etc. At this time, the detection limit is determined according to the actual test conditions. Assessment (see Chapter 7). The following editorial changes have been made to this document. ---Added informative Appendix B. Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed by China Light Industry Federation. This document is under the jurisdiction of the National Paper Industry Standardization Technical Committee (SAC/TC141). This document was drafted by. Zhejiang Aili New Material Technology Co., Ltd., Swiss Vantone China Co., Ltd., Suqian Kejia Environmental Protection Technology Co., Ltd. Company, China Pulp and Paper Research Institute Co., Ltd., Zhongqing Paper Products Inspection and Certification Co., Ltd., Guangda Paper Products (Zhongshan) Co., Ltd., Guotengcai Colored Paper Products (Heshan) Co., Ltd., National Paper Quality Inspection and Testing Center. The main drafters of this document. Cao Yuan, Li Wen'ao, Zhao Shixin, Song Bingxin, Gao Jun, Liu Yong, Li Kui, Wu Yingliang, Yao Min, Wen Jianyu, Zhang Meng, Huang Yaodong, Huang Yaoxing. The previous versions of this document and the documents it replaces are as follows. ---First published in 1985 as GB/T 5404-1985 "Determination of water-soluble sulfate in paper, cardboard and pulp"; ---When revised for the first time in.1996, it was revised to GB/T 2678.6-1996 "Determination of water-soluble sulfate in paper, cardboard and pulp" (Conductometric titration)》; ---This is the second revision. Determination of water-soluble sulfates in paper, board and pulp Warning---Personnel using this document should have practical experience in regular laboratory work. This document does not address all possible security issues question. Users are responsible for taking appropriate safety and health measures and ensuring compliance with the conditions stipulated in relevant national regulations.1 ScopeThis document describes conductometric titration and ion chromatographic methods for the determination of water-soluble sulfates in paper, board and pulp. This document applies to all types of paper, board and pulp.2 Normative reference documentsThe contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 450 Collection of paper and cardboard samples and determination of longitudinal, transverse, front and back sides of the sample (GB/T 450-2008, ISO 186. 2002,MOD) GB/T 462 Determination of moisture content of paper, cardboard and pulp analysis samples (GB/T 462-2023, ISO 287.2017, ISO 638-1. 2022,ISO 638-2.2022,MOD) GB/T 740 Collection of pulp samples (GB/T 740-2003, ISO 7213.1991, IDT) GB/T 6682 Analytical laboratory water specifications and test methods (GB/T 6682-2008, ISO 3696.1987, MOD)3 Terms and definitionsThe following terms and definitions apply to this document. 3.1 water-solublesulfateswater-solublesulfates The content of sulfate ions in the aqueous extract of paper, cardboard and pulp samples measured under specified conditions. 4.Conductometric titration 4.1 Principle The sample is extracted with boiling water for 1 hour, and the sulfate ions in the filtrate are precipitated with barium ions. The excess barium ions are measured with conductivity using lithium sulfate standard solution. Determination by titration method. 4.2 Reagents Unless otherwise specified, use only analytically pure reagents. 4.2.1 Water, GB/T 6682, Level 2. 4.2.2 Ethanol (C2H5OH), 95% (volume fraction). 4.2.3 Hydrochloric acid, 36%~38%. 4.2.4 Barium chloride (BaCl2) solution, [c(BaCl2)=5mmol/L]. Weigh 1.22g barium chloride dihydrate (BaCl2·2H2O), and use water ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 2678.6-2023_English be delivered?Answer: Upon your order, we will start to translate GB/T 2678.6-2023_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 2678.6-2023_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 2678.6-2023_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 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 2678.6-2023?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 2678.6-2023 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. |
