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GB/T 639-2008: Chemical reagent -- Sodium carbonate anhydrous
Status: Valid GB/T 639: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 639-2008 | English | 189 |
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Chemical reagent -- Sodium carbonate anhydrous
| Valid |
GB/T 639-2008
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| GB/T 639-1986 | English | 199 |
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Chemical reagents--Sodium carbonate, anhydrous
| Obsolete |
GB/T 639-1986
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PDF similar to GB/T 639-2008
Basic data | Standard ID | GB/T 639-2008 (GB/T639-2008) | | Description (Translated English) | Chemical reagent -- Sodium carbonate anhydrous | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G62 | | Classification of International Standard | 71.040.30 | | Word Count Estimation | 8,86 | | Date of Issue | 2008-05-15 | | Date of Implementation | 2008-11-01 | | Older Standard (superseded by this standard) | GB/T 639-1986 | | Quoted Standard | GB/T 601; GB/T 602; GB/T 603; GB/T 609; GB/T 6682; GB/T 9723-2007; GB/T 9728; GB/T 9729; GB/T 9734; GB/T 9738; GB/T 9739; GB 15346; HG/T 3484; HG/T 3921 | | Adopted Standard | ISO 6353-2-1983, NEQ | | Regulation (derived from) | National Standard Approval Announcement 2008 No.8 (Total No.121) | | 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 chemical reagents anhydrous sodium carbonate traits, specifications, trial, packaging and inspection rules and signs. This standard applies anhydrous sodium carbonate chemical reagent test. | GB/T 639-2008: Chemical reagent -- Sodium carbonate anhydrous---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. Sodium carbonate anhydrous
ICS 71.040.30
G62
National Standards of People's Republic of China
Replacing GB/T 639-1986
Chemicals anhydrous sodium carbonate
(ISO 6353-2. 1983, Reagentsforchemicalanalysis-
Part 2. Specifications-Firstseries, NEQ)
Posted 2008-05-15
2008-11-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard and ISO 6353-2. 1983 "Chemical analysis of reagent --- Part II. Specifications 1 Series" in R30 "anhydrous sodium carbonate," the
Non-equivalent.
This standard replaces GB /"Chemicals anhydrous sodium carbonate," compared with the GB/T 639-1986 T 639-1986 main changes are as follows.
--- Project Name "loss on drying" to "loss on ignition", "nitrogen compound" to "total nitrogen" (1986 edition 1.2,2.2.3,
2.2.6, this version of 4,5.6,5.9);
--- Clarity test specifications by a "qualified" to "2", "3", "Number 4" (1986 version 1.2, Chapter 4 of this edition);
--- Water-insoluble, chloride, aluminum, iron four general methods instead of chemical reagents Determination (1986 edition 2.2.2,2.2.4,2.2.9,
2.2.12, this version of 5.5,5.7,5.12,5.15.
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. Shenyang Chemical Reagent Factory.
The main drafters of this standard. Yang Yuhua, Huangyu Juan, Ju Tempo.
This standard was first published in 1965, in 1986 the first amendment.
Chemicals anhydrous sodium carbonate
Molecular formula. Na2CO3
Molecular weight. 105.99 (according to 2005 international relative atomic mass)
1 Scope
This standard specifies the chemical reagent in anhydrous sodium carbonate traits, specifications, testing, packaging and inspection rules and signs.
This standard applies anhydrous sodium carbonate test chemical reagent.
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 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 609 chemical reagent - General method for determination of total nitrogen (GB/T 609-2006, ISO 6353-1. 1982)
GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD)
GB/T 9723-2007 Chemicals flame atomic absorption spectrometry General
GB/T 9728 General method for determination of chemical reagents sulfate (GB/T 9728-2007, ISO 6353-1. 1982, NEQ)
GB/T 9729 General method for determination of chloride Chemicals (GB/T 9729-2007, ISO 6353-1. 1982, NEQ)
GB/T 9734-2008 Determination of aluminum Chemicals general method (ISO 6353-1. 1982, NEQ)
GB/T 9738 Determination of water insoluble chemical reagent - General method (GB/T 9738-2008, ISO 6353-1. 1982, NEQ)
GB/T 9739 General method for determination of iron chemical reagents (GB/T 9739-2006, ISO 6353-1. 1982, NEQ)
GB 15346 chemical reagent packaging and marking
HG/T 3484 standard chemical reagents glass emulsion and clarity standards
HG/T 3921 Chemicals sampling and acceptance rules
3 Characters
This reagent as a white powder, water is exposed to air gradually become a hydrate, soluble in water, soluble in ethanol.
4 Specification
Anhydrous sodium carbonate as shown in Table 1.
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