GB/T 670-2007 English PDF

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GB/T 670-2007: Chemical reagents -- Silver nitrate
Status: Valid

GB/T 670: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 670-2007	189	Add to Cart	3 days	Chemical reagents -- Silver nitrate	Valid
GB/T 670-1986	199	Add to Cart	2 days	Chemical reagents--Silver nitrate	Obsolete

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Basic data

Standard ID: GB/T 670-2007 (GB/T670-2007)
Description (Translated English): Chemical reagents -- Silver nitrate
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G62
Classification of International Standard: 71.040.30
Word Count Estimation: 7,717
Date of Issue: 2007-10-25
Date of Implementation: 2008-04-01
Older Standard (superseded by this standard): GB/T 670-1986
Quoted Standard: GB/T 601; GB/T 602; GB/T 603; GB/T 6682; GB/T 9723-2007; GB/T 9724; GB 15258; GB 15346; HG 2484; HG/T 3921
Adopted Standard: ISO 6353-2-1983, 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 chemical reagents-traits of silver nitrate, specifications, trial, packaging and inspection rules and signs. This standard applies to chemical agents-silver nitrate test.

GB/T 670-2007: Chemical reagents -- Silver nitrate

---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 reagents. Silver nitrate ICS 71.040.30 G62 National Standards of People's Republic of China Replacing GB/T 670-1986 Chemical reagents silver nitrate (ISO 6353-2. 1983, Reagentsforchemicalanalysis- Part 2. Specifications-Firstseries, 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 6353-2. 1983 "Reagents for chemical analysis - Part 2. Specification 1 of this series," The R28 "silver nitrate" consistency Not equivalent. This standard replaces GB /"chemical reagents silver nitrate," compared with the GB/T 670-1986 T 670-1986 main changes are as follows. --- Increased traits (Chapter 3 of this edition); --- The reaction solution to pH values of 5.0 to 6.0 specification (1986 version 1.3,2.3, edition Chapter 4, 5.4); --- The specification Clarity test by qualified to No. 2, No. 3, No. 5 (1986 version 1.4, Chapter 4 of this edition); --- Cancellation of water insolubles, manganese, nickel, zinc, cadmium, thallium (1986 version 1.4,2.4.2,2.4.5,2.4.7,2.4.9, 2.4.10, 2.4.11); --- Modified iron, copper, determination of lead (1986 edition 2.4.6,2.4.8,2.4.12, this edition 5.8,5.9,5.10) ; --- Adjust the packaging and logo (version 4.1, 4.2, 1986, edition of Chapter 7). 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 is drafted by. Shanghai again four Hervey Chemical Co., Ltd. Participated in the drafting of this standard. Shanghai Chemical Co. Shenbo. The main drafters of this standard. Jia Ling. This standard was first published in 1965, in 1977 the first amendment, the Second Amendment in 1986. Chemical reagents silver nitrate Warning. some of the test procedure specified in this standard can lead to dangerous situations, the user has the responsibility to take appropriate safety and health practices. Formula. AgNO3 Molecular weight. 169.87 (according to 2003 international relative atomic mass)

1 Scope

This standard specifies the characteristics, specifications, testing, inspection rules, logo and packaging and chemical reagents --- silver nitrate. This standard applies to testing chemical agents --- silver nitrate.

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 6682 analytical laboratory use specifications and test methods (GB/T 6682-1992, neq ISO 3696. 1987) GB/T 9723-2007 Chemicals flame atomic absorption spectrometry General GB/T 9724 General rule for determination of pH chemical reagent (GB/T 9724-2007, ISO 6353-1. 1982, NEQ) GB 15258 rules for preparation of chemical safety labels 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 is colorless or white crystals, soluble in water, easily oxidized in air, protected from light, the case of organic black.

4 Specification

Silver nitrate as shown in Table 1. Table 1 silver nitrate specifications Name pure class pure analytical chemistry Content (AgNO3), /% ≥99.8 ≥99.8 ≥99.5 Exterior Pass Pass Pass pH value (50g/L, 25 ℃) 5.0 ~ 6.0 5.0 ~ 6.0 5.0 ~ 6.0 Clarity test, number ≤2 ≤3 ≤5 Chloride (Cl), /% ≤0.0005 ≤0.001 ≤0.003 Sulphate (SO4), /% ≤0.002 ≤0.004 ≤0.006 ......

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