GB/T 7717.5-2008Acrylonitrile for industrial use - Part 5: Determination of acidity and pH value and titration value (English PDF)
工业用丙烯腈 第5部分: 酸度、pH值和滴定值的测定
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
June 19, 2008
Implementation date
February 1, 2009
Scope
GB/T 7717.5-2008 is the English-translated version of 工业用丙烯腈 第5部分: 酸度、pH值和滴定值的测定.
GB/T 7717.5-2008 is the Chinese standard "Acrylonitrile for industrial use - Part 5: Determination of acidity and pH value and titration value". Its scope clause reads: This section provides industrial acrylonitrile acidity, pH value and the determination of the titration values.
This section applies to the determination of Acrylonitrile for industrial use acidity, pH and titration value, the minimum detectable concentration acidity of 1mg/kg (in acetic acid meter). Its clauses include security; method summary; reagents and solutions.
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Document preview — GB/T 7717.5-2008
National Standard of the People's Republic of China
- ICS
- 71.080.30
- Classification
- G 17
- Replacing
- GB/T 7717.13-1994
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Security
- 4 Method summary
- 5 Reagents and solutions
1 Scope
This section provides industrial acrylonitrile acidity, pH value and the determination of the titration values.
This section applies to the determination of Acrylonitrile for industrial use acidity, pH and titration value, the minimum detectable concentration acidity of 1mg/kg (in acetic acid meter).
2 Normative references
The following documents contain provisions by GB/T 7717 reference in this part of the provisions of this section. For dated references,
All subsequent amendments (not including errata content) or revisions do not apply to this section, however, encourage the agreement on this section
Whether the parties can study the latest versions of these documents. For undated reference documents, the latest versions apply to this section.
Preparation of GB/T 601 chemical reagent standard titration solution
GB/T 603 chemical reagent in test methods - Preparations with
GB/T 3723 Sampling of chemical products for industrial use General Safety (GB/T 3723-1999, idt ISO 3165. 1976)
GB/T 6678 General Principles for Sampling Chemical Products
GB/T 6680 General rules for sampling liquid chemical products
GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD)
GB/T 8170 numerical rounding rules
GB/T 9724 General rule for determination of pH chemical reagent
3 Security
3.1
Acrylonitrile for industrial use is a highly dangerous, highly toxic and volatile, through the skin and the respiratory tract is absorbed by the body, it should be analyzed in the hood
Carried out, and to provide labor protection measures to protect the skin and respiratory organs for personnel exposed to acrylonitrile.
4 Method summary
4.1 Determination of acidity
under conditions not in contact with carbon dioxide to thymol blue as indicator alcohol standard solution titration with an acid base titration
Total.
4.2 pH value measurement
pH meter acrylonitrile solution (5% mass fraction) of the pH value measured directly.
4.3 Titration value measurement
a predetermined volume and is measured by the acrylonitrile solution pH value of 4.2 with 0.1mol/L sulfuric acid standard titration
Potentiometric titration solution, titration to a pH equal to 5.0, the number of records ml of sulfuric acid standard titration solution required, as a sample of the drops
Value.
5 Reagents and solutions
This part of the reagents and water, did not indicate when the other requirements, refer to the three water analytical reagent and GB/T 6682 stipulated.
As used in this part of the standard titration solution, preparations and products, did not indicate when the other requirements, according to GB/T 601, GB/T 603 provisions preparation.
......
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 7717.5
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 7717.5-2008 | Acrylonitrile for industrial use - Part 5: Determination of acidity and pH value and titration value | current edition | Current |
| GB/T 7717.13-1994 | Acrylonitrile for industrial use - Part 5: Determination of acidity and pH value and titration value | previous edition | Superseded |
This page sells the current edition, GB/T 7717.5-2008. Earlier editions are listed for reference only.
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