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GB/T 9731-2007: Chemical reagent -- General method for the determination of sulphur compounds
Status: Valid GB/T 9731: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 9731-2007 | English | 139 |
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Chemical reagent -- General method for the determination of sulphur compounds
| Valid |
GB/T 9731-2007
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| GB/T 9731-1988 | English | 199 |
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Chemical reagent--General method for the determination of sulphur compounds
| Obsolete |
GB/T 9731-1988
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PDF similar to GB/T 9731-2007
Basic data | Standard ID | GB/T 9731-2007 (GB/T9731-2007) | | Description (Translated English) | Chemical reagent -- General method for the determination of sulphur compounds | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G60 | | Classification of International Standard | 71.040.30 | | Word Count Estimation | 4,427 | | Date of Issue | 2007-10-25 | | Date of Implementation | 2008-04-01 | | Older Standard (superseded by this standard) | GB/T 9731-1988 | | Adopted Standard | ISO 6353-1-1982, NEQ | | Regulation (derived from) | China National Standard Approval Announcement2007 No.11 (Total No.111) | | 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 sulfur compounds will be converted into sulphate and common methods turbidimetric method of visually. This standard applies to the determination of inorganic sulfur compounds produced by the reaction of potassium xanthate and potassium hydroxide ethanol solution of organic solvents and the total amount of organic sulfur compounds. Detection range of 0. 4 ��g/mL ~ 4 ��g/mL (as SO4). | GB/T 9731-2007: Chemical reagent -- General method for the determination of sulphur compounds---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.
Chemical reagent. General method for the determination of sulphur compounds
ICS 71.040.30
G60
National Standards of People's Republic of China
Replacing GB/T 9731-1988
Chemical Reagents
General method for the determination of sulfur compounds
(ISO 6353-1. 1982, Reagentsforchemicalanalysis-
Part 1. Generaltestmethods, NEQ)
Posted 2007-10-25
2008-04-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard and ISO 6353-1. 1982 "Reagents for chemical analysis - Part 1. General test method" non-equivalent.
This standard replaces GB/T 9731-1998 "General method for determination of chemical reagents sulfur compounds."
This standard was no difference with the previous version of the standard in technical content, according to GB/T 1.1-2000 requirements, and only made some editorial
modify.
The standard proposed by China Petroleum and Chemical Industry Association.
This standard by the National Standardization Technical Committee Chemistry Chemicals Branch (SAC/TC63/SC3) centralized.
This standard was drafted. Sinopharm Chemical Reagent Co., Ltd.
The main drafters of this standard. Chenhao Yun, Chen Hong.
This standard was first published in 1988.
Chemical Reagents
General method for the determination of sulfur compounds
1 Scope
This standard specifies converting the sulfur compounds to sulfates and the general method of nephelometry visually.
Inorganic sulfur compounds and organic sulfur compounds can be produced by the reaction of potassium xanthate and potassium hydroxide ethanol solution is applicable to the organic solvent
Determination of the total composition. Detection range of 0.4μg/mL ~ 4μg/mL (in terms of SO4).
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 602 Determination of impurities in chemical reagents prepared standard solution (GB/T 602-2002, ISO 6353-1. 1982, NEQ) with
GB/T 603 chemical reagent test method Preparations of articles (GB/T 603-2002, ISO 6353-1 with. 1982,
NEQ)
GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-1992, neq ISO 3696. 1987)
GB/T 9728 General method for determination of chemical reagents sulfate (GB/T 9728-2007, ISO 6353-1. 1982, NEQ)
3 PRINCIPLE OF THE METHOD
The organic solvent solution of potassium hydroxide in ethanol at reflux in the sample and inorganic sulfur compounds capable of forming a solution of potassium hydroxide in ethanol and the reaction
Xanthan potassium organic sulfur compounds are converted to the corresponding salt with a suitable oxidizing agent capable of oxidizing these salts to sulfate. Available sulfuric acid
Barium visual turbidimetry. The mass fraction of sulfur compounds Sulfate.
4 Reagents and materials
Unless otherwise specified in this standard, the standard solution, preparations and products, according to GB/T 602, the provisions of the preparation of GB/T 603, the experimental
Water should be consistent with GB/T 6682 water in three specifications, are the mass fraction of the solution used in "%" represents.
5 instruments and devices
5.1 General laboratory equipment.
5.2 mill mouth reflux device.
6 Determination
According to product standard sample was added 50mL potassium hydroxide - ethanol, heated under reflux for 30min. Joined from the upper end of the condenser
50mL water, remove the condenser, evaporated on a water bath. Add 5mL "30% hydrogen peroxide", and then incubated in a water bath 15min, with hydrochloric acid solution
(20%) neutralized and excess 1mL, the solution was diluted to a certain volume, remove the portion of the solution was evaporated to dryness in a water bath. The residue was dissolved in water plus 5mL
(If necessary filter), (10g/L) and after, according to the provisions of GB/T 9728 Determination of sulfate with sodium hydroxide solution. While doing the blank test.
Standard preparation turbid solution is to take the ratio of the blank test solution and a predetermined amount of sulfate (SO4) standard solution, the residue was dissolved in water and added 5mL
(Filtered if necessary), with sodium hydroxide solution (10g/L) and the sample solution after the same treatment at the same time.
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