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GB/T 9726-2007: Chemical reagent -- General rule for the determination of permanganate-reducing substances
Status: Valid GB/T 9726: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 9726-2007 | English | 159 |
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Chemical reagent -- General rule for the determination of permanganate-reducing substances
| Valid |
GB/T 9726-2007
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| GB/T 9726-1988 | English | 199 |
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Chemical reagent--General rules for the determination of permanganate-reducing substances
| Obsolete |
GB/T 9726-1988
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PDF similar to GB/T 9726-2007
Basic data | Standard ID | GB/T 9726-2007 (GB/T9726-2007) | | Description (Translated English) | Chemical reagent -- General rule for the determination of permanganate-reducing substances | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G60 | | Classification of International Standard | 71.040.30 | | Word Count Estimation | 6,613 | | Date of Issue | 2007-09-26 | | Date of Implementation | 2008-04-01 | | Older Standard (superseded by this standard) | GB/T 9726-1988 | | Adopted Standard | ISO 6353-1-1982, NEQ | | Regulation (derived from) | China National Standard Approval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 direct method (visual colorimetry) and indirect (titration analysis method) reduction of potassium permanganate substances common method. This standard applies to the direct method neutral alcohol, ketones or other neutral, weakly alkaline samples measured substances containing low potassium permanganate reduction, indirect method is suitable for the reduction in the sample material over the content of potassium permanganate high or measuring the reaction of potassium permanganate and potassium permanganate substances more difficult to sample restored. | GB/T 9726-2007: Chemical reagent -- General rule for the determination of permanganate-reducing substances
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Chemical reagent. General rule for the determination of permanganate-reducing substances
ICS 71.040.30
G60
National Standards of People's Republic of China
Replacing GB/T 9726-1988
Chemical Reagents
General principles for measurement of potassium permanganate reducing substance
(ISO 6353-1. 1982, Reagentsforchemicalanalysis-
Part 1. Generaltestmethods, NEQ)
Posted 2007-09-26
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 9726-1988 "chemical reagents potassium permanganate reducing substances determination Law", and GB/T 9726-1988 phase
Than the main changes are as follows.
--- Modify the contents of the principle of the method (see Chapter 3);
--- Cancel the 1988 edition of Appendix B.
Appendix A of this standard is an informative annex.
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. Guangdong Guanghua Chemical Factory Co., Ltd.
The main drafters of this standard. Li Tao Pan, Zhang Zhibin, even the king of the body.
This standard was first published in 1988.
Chemical Reagents
General principles for measurement of potassium permanganate reducing substance
1 Scope
This standard specifies the direct method (visual colorimetric method) and indirect methods (titration analysis) Determination of permanganate reducing substances in the general method.
This standard applies to the direct method neutral alcohols, ketones, or other neutral, weakly alkaline reduction test sample containing substances of low potassium permanganate
Set; indirect method for sample reaction to restore higher levels of potassium permanganate, potassium permanganate reducing substance or substances in the sample than with potassium permanganate
Determination difficult performed.
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.
Preparation of GB/T 601 chemical reagent standard titration solution
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)
3 PRINCIPLE OF THE METHOD
Under certain conditions, the test solution of potassium permanganate reducing substances can react with potassium permanganate, so that the test solution fade.
3.1 Direct Method
According to the standard potassium permanganate titration solution concentration, size and degree of fading can be given potassium permanganate reducing substances semiquantitative
result.
3.2 indirect method
Determination of residual use of potassium permanganate iodometry, potassium permanganate reducing substance can be obtained mass fraction.
4 Reagents and materials
Unless otherwise specified, the standard titration solution, preparations and products, according to GB/T 601, the provisions of the preparation of GB/T 603, the test water
Shall comply with GB/T 6682 water in three specifications, are used in the mass fraction solution "%" represents.
5 instruments and devices
5.1 General laboratory equipment.
5.2 microburette.
6 Determination
6.1 Direct Method
Sampling and preparation of test solution by product standards, put ground glass colorimetric tube, add a predetermined volume of potassium permanganate Standard Solution
[Ba (15KMnO4
) = 0.1mol/L], cover the plug at a predetermined temperature in the dark for a predetermined period of time. Pink solution was observed
No completely disappear. Calculation Method See Appendix A.
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