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GB/T 2390-2013Dyes - Determination of pH value (English PDF)

染料 pH值的测定

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

July 19, 2013

Implementation date

December 1, 2013

Scope

GB/T 2390-2013 is the English-translated version of 染料 pH值的测定.

GB/T 2390-2013 is the Chinese standard "Dyes - Determination of pH value". Its scope clause reads: 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. Its clauses include reagents; instruments.

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Document preview — GB/T 2390-2013

National Standard of the People's Republic of China

ICS: 71.100.01
Classification: G 55
Replacing: GB/T 2390-2003

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

1 Scope
2 Normative references
4 Reagents
5 Instruments

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.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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Editions of GB/T 2390

Edition	Title	Revision	Status
GB/T 2390-2013	Dyes - Determination of pH value	current edition	Current
GB/T 2390-2003	Dyes - Determination of pH value	previous edition	Superseded

This page sells the current edition, GB/T 2390-2013. Earlier editions are listed for reference only.

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