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GB/T 2386-2014: Dyestuffs and intermediate of dyes -- Determination of moisture content
Status: Valid GB/T 2386: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 2386-2014 | English | 299 |
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Dyestuffs and intermediate of dyes -- Determination of moisture content
| Valid |
GB/T 2386-2014
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| GB/T 2386-2006 | English | 479 |
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Dyestuffs and intermediate of dyes -- Determination of moisture
| Obsolete |
GB/T 2386-2006
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| GB/T 2386-2003 | English | 239 |
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Dyestuffs and intermediate of dyestuffs -- Determination of moisture content
| Obsolete |
GB/T 2386-2003
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| GB/T 2386-1980 | English | 199 |
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Determination of moisture content in dyes and dye intermediates
| Obsolete |
GB/T 2386-1980
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PDF similar to GB/T 2386-2014
Basic data | Standard ID | GB/T 2386-2014 (GB/T2386-2014) | | Description (Translated English) | Dyestuffs and intermediate of dyes -- Determination of moisture content | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G55 | | Classification of International Standard | 71.100.01; 87.060.10 | | Word Count Estimation | 13,137 | | Date of Issue | 7/8/2014 | | Date of Implementation | 12/1/2014 | | Older Standard (superseded by this standard) | GB/T 2386-2006 | | Quoted Standard | GB/T 2374-2007; GB/T 8170-2008 | | Regulation (derived from) | 2014 National Standards Bulletin No. 18 | | 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 the method for the determination of moisture dyes and dye intermediates. This standard applies to all types of dyes, dye intermediates determination of moisture, which ? Karl Fischer method and Karl Fischer ? Improvement Act applie | GB/T 2386-2014: Dyestuffs and intermediate of dyes -- 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.
Dyestuffs and intermediate of dyes. Determination of moisture content
ICS 71.100.01; 87.060.10
G55
National Standards of People's Republic of China
Replacing GB/T 2386-2006
Determination of dyes and dye intermediates moisture
Issued on. 2014-07-08
2014-12-01 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 2386-2006 "dyes and dye intermediates Determination of moisture", compared with the GB/T 2386-2006, the main
To technical changes are as follows.
--- Modify the results of the maintenance accuracy (see 31, 32, 33, 2006 edition of 3.1,3.2,3.3...);
--- Increased fast drying method (see 3.2.2);
--- Modify the contents of the test report (see Chapter 4, Chapter 4 of the 2006 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. Wang Jinhua double-Chemical Co., Ltd., Shenyang Chemical Research Institute Co., Ltd., the State Quality Supervision and Inspection Center dye.
The main drafters of this standard. Ma Junqing, Xu Jiancheng, Zhang Guodong, Yang Zhenmei.
This standard replaces the standards previously issued as follows.
--- GB 2386-1980, GB/T 2386-2003, GB/T 2386-2006;
--- GB/T 13753-1992.
Determination of dyes and dye intermediates moisture
1 Scope
This standard specifies the method for the determination of moisture dyes and dye intermediates.
This standard applies to all types of dyes, dye intermediates determination of moisture, which Karl Fischer method and improved Karl Fischer method is suitable for dyeing
Determination of trace moisture in materials and dye intermediates, but the main ingredient does not apply with Karl Fischer reagents and reaction produces water samples
And capable of reducing the oxidation of iodine or iodide in water samples was measured.
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.
General conditions GB/T 2374-2007 Determination of dyes provisions
GB/T 8170-2008 repair numerical representation about rules and limit values \u200b\u200band judgment
Test Method 3
3.1 solvent extraction method
3.1.1 Reagents
Reagents should meet the following requirements.
a) Toluene. chemically pure.
b) Xylene. chemically pure.
3.1.2 The instruments and equipment
The equipment shall comply with GB/T 2374-2007 Chapter 4, the apparatus comprising.
a) rack pan balance scales. a sense of not more than 0.1g.
b) determination of moisture content, a structure shown in Figure 1.
3.1.3 measuring step
In a clean, dry moisture measuring a distillation flask was placed dye Sample Test 20g ~ 50g (accurate to 0.1g), was added
100mL ~ 125mL of water saturated with toluene or xylene, after distillation bottle cap and a condenser connected with the scale, placed in a heating bath plus
Hot, boiling toluene or xylene reflux, reflux speed control, the condensate per second rate of 2 to 5 drops dripping from the condenser end. when
Scale cap not increase the volume of water, when the upper solution becomes transparent, the heating was stopped, cooled 30min, read from the scale of the water body cap
Product; if the upper solution rendered turbid, it will accept the tube in warm water, clarified, and then cooled to room temperature readings; if condenser inner walls stained
Droplets, can increase or flame voltage was increased, heating for several minutes, the droplets burst into the receptacle, and then cooled to room temperature readings. Still valid, the gold
Genus wire or thin glass rod end with rubber or plastic head, the water droplets scraped into the condenser wall receptacle and then cooled to room temperature readings.
Also do a parallel blank test. In a clean, dry distillation flask 100mL ~ 125mL of water saturated with toluene or xylene
Benzene, and the other with a pipette 0.50mL distilled water, following the same process with the sample, read the last volume of the effluent from the cap scale.
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