GB/T 2390-2013 English PDFUS$149.00 ยท In stock
Delivery: <= 2 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 2390-2013: Dyes -- Determination of pH value Status: Valid GB/T 2390: Historical versions
Basic dataStandard ID: GB/T 2390-2013 (GB/T2390-2013)Description (Translated English): Dyes -- Determination of pH value Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: G55 Classification of International Standard: 71.100.01; 87.060.10 Word Count Estimation: 5,547 Older Standard (superseded by this standard): GB/T 2390-2003 Quoted Standard: GB/T 6682-2008 Regulation (derived from): National Standards Bulletin 2013 No. 10 Issuing agency(ies):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: Dye pH value measurement method. This standard applies to all types of dyes of pH measured. GB/T 2390-2013: Dyes -- Determination of pH value---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.Dyes. Determination of pH value ICS 71.100.01; 87.060.10 G55 National Standards of People's Republic of China Replacing GB/T 2390-2003 Determination of pH value of the dye Issued on. 2013-07-19 2013-12-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordThis standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard replaces GB/T 2390-2003 "Determination of water-soluble dye pH value", compared with the GB/T 2390-2003, in addition to editorial Modify outside the main technical changes are as follows. --- Standard name was changed to "dye measured pH value" (see standard name, the 2003 edition of the standard name); --- Modify the scope of the standard contents (see Chapter 1, 2003 edition of the Chapter 1); --- Modify the narrative test methods (see Chapter 6, Section 6 of the 2003 edition). The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee Dye (SAC/TC134) centralized. This standard was drafted. Zhejiang Longsheng Group Co., Ltd., Shangyu Du Pu chemical, Shenyang Chemical Research Institute Co., Ltd. The main drafters of this standard. He Xubin, Dong Zhongsheng, Xie Weide, its Europe, Ruanhua Liang, Wangren Liang. This standard replaces the standards previously issued as follows. --- GB 2390-1980, GB/T 2390-2003. Determination of pH value of the dye1 ScopeThis standard specifies the method for measuring the pH of the dye. This standard applies to the determination of various types of dye pH values.2 Normative referencesThe 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 6682-2008 analytical laboratory use specifications and test methods (ISO 3696. 1987, MOD) Principle 3 The quantitative dye dissolved or dispersed in distilled water and the pH was adjusted to 7 quantitatively measured for pH.4 ReagentsUnless otherwise specified, use only recognized as analytical reagents and GB/T 6682-2008 specified in the third grade water.5 Instruments5.1 pH meter. dividing the value of not more than 0.1. 5.2 Electrode.; - calomel electrode or a glass composite glass electrode measuring electrode, a reference electrode is a calomel electrode. 5.3 Analysis of balance. a sense of not more than 0.0001g. Step 6 Analysis Sample preparation 6.1 6.1.1 Water regulation Treated distilled water adjusted to pH 7, the adjustment process may not use the buffer solution, the use of chemical reagents and the test sample can not occur reaction. 6.1.2 Sample preparation Weigh the sample 1g (accurate to 0.0004g), dissolved or dispersed in 100mL of by this standard 6.1.1 was adjusted to pH value at room temperature 7 distilled water, stir, dye fully dissolved or completely dispersed. 6.2 Instrument Adjustment Before use, the glass electrode should be soaked in water for at least 24h. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 2390-2013_English be delivered?Answer: Upon your order, we will start to translate GB/T 2390-2013_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 2 working days. 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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 2390-2013?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 2390-2013 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. |
