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GB/T 2390-2013: Dyes -- Determination of pH value
Status: Valid GB/T 2390: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 2390-2013 | English | 149 |
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2 days [Need to translate]
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Dyes -- Determination of pH value
| Valid |
GB/T 2390-2013
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| GB/T 2390-2003 | English | 199 |
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2 days [Need to translate]
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Water-soluble dyes -- Determination of pH value
| Obsolete |
GB/T 2390-2003
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| GB/T 2390-1980 | English | 199 |
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2 days [Need to translate]
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Determination of pH value for reactive dyes
| Obsolete |
GB/T 2390-1980
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PDF similar to GB/T 2390-2013
Basic data | Standard 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| Classification of International Standard | 71.100.01; 87.060.10 | | Word Count Estimation | 5,547 | | Older Standard (superseded by this standard) | GB/T 2390-2003 | | Quoted Standard | GB/T 6682-2008 | | Regulation (derived from) | National Standards Bulletin 2013 No. 10 | | Issuing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
Foreword
This 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 dye
1 Scope
This 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 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 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 Reagents
Unless otherwise specified, use only recognized as analytical reagents and GB/T 6682-2008 specified in the third grade water.
5 Instruments
5.1 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.
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