GB/T 2386-2014Dyestuffs and intermediate of dyes - Determination of moisture content (English PDF)
染料及染料中间体 水分的测定
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
July 8, 2014
Implementation date
December 1, 2014
Scope
GB/T 2386-2014 is the English-translated version of 染料及染料中间体 水分的测定.
GB/T 2386-2014 is the Chinese standard "Dyestuffs and intermediate of dyes - Determination of moisture content". Its scope clause reads: 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.
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Document preview — GB/T 2386-2014
National Standard of the People's Republic of China
- ICS
- 71.100.01
- Classification
- G 55
- Replacing
- GB/T 2386-2006
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
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 and 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.
GB/T 24164-2020 | GB/T 23978-2020 | GB/T 2374-2017 | GB/T 2387-2025 | GB/T 2378-2025 | GB/T 2391-2024 | […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Similar standards
Editions of GB/T 2386
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 2386-2014 | Dyestuffs and intermediate of dyes - Determination of moisture content | current edition | Current |
| GB/T 2386-2006 | Dyestuffs and intermediate of dyes - Determination of moisture content | previous edition | Superseded |
This page sells the current edition, GB/T 2386-2014. Earlier editions are listed for reference only.
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