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GB/T 661-2011 English PDF

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Q: Should I purchase the latest version GB/T 661-2011?

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US$209.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 661-2011: Chemical reagent -- Ammonium iron (Ⅱ) sulfate hexahydrate
Status: Valid

GB/T 661: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 661-2011	209	Add to Cart	3 days	Chemical reagent -- Ammonium iron (Ⅱ) sulfate hexahydrate	Valid
GB/T 661-1992	199	Add to Cart	2 days	Chemical reagent--Ammonium iron (II)shlfate hexahydrate	Obsolete

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Basic data

Standard ID: GB/T 661-2011 (GB/T661-2011)
Description (Translated English): Chemical reagent -- Ammonium iron (��) sulfate hexahydrate
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G62
Classification of International Standard: 71.040.30
Word Count Estimation: 9,962
Date of Issue: 2011-05-12
Date of Implementation: 2011-12-01
Older Standard (superseded by this standard): GB/T 661-1992
Quoted Standard: GB/T 601; GB/T 602; GB/T 603; GB/T 6682; GB/T 9723-2007; GB/T 9724; GB/T 9727; GB/T 9738; GB 15346; HG/T 3921
Adopted Standard: ISO 6353-3-1987, NEQ
Regulation (derived from): Announcement of Newly Approved National Standards No. 6 of 2011
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 sulfate hexahydrate (��) ammonium traits, specifications, testing, inspection and marking and packaging rules. This standard applies to chemical reagents sulfate hexahydrate (��) ammonium test.

GB/T 661-2011: Chemical reagent -- Ammonium iron (Ⅱ) sulfate hexahydrate

---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. Ammonium iron (Ⅱ) sulfate hexahydrate ICS 71.040.30 G62 National Standards of People's Republic of China Replacing GB/T 661-1992 Chemical Reagents Iron sulfate hexahydrate (Ⅱ) ammonium (ammonium ferrous sulfate) (ISO 6353-3. 1987, Reagentsforchemicalanalysis- Part 3. Specifications-Secondseries, NEQ) Issued on. 2011-05-12 2011-12-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard and ISO 6353-3. 1987 "Reagents for chemical analysis - Part 3. Specifications 2 Series" in R42 "iron sulfate hexahydrate (Ⅱ) ammonium "degree of consistency is not equivalent. This standard replaces GB/T 661-1992 "Chemicals iron sulfate hexahydrate (Ⅱ) ammonium (ammonium ferrous sulfate)", and GB/T 661- The main changes compared to 1992 are as follows. --- PH value of 3-5 is adjusted to a pH of 3.0 to 5.0 (1992 version 3.2, Chapter 4 of this edition); --- Zinc from the AR specifications "0.005%" to "0.003%" (1992 version 3.3, Chapter 4 of this edition); --- Improved determination of chloride (1992 version 4.3.2, this version 5.6); --- Adjust the amount of zinc samples measured (1992 version 4.3.7, this version 5.11); --- Adjust the frequency and the determination of lead extraction method (1992 version 4.3.8, this version 5.12). 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. Shanghai Chemical Co., try four Hervey. The main drafters of this standard. Jia Ling. This standard replaces the standards previously issued as follows. --- GB/T 661-1965, GB/T 661-1977, GB/T 661-1992. Chemical Reagents Iron sulfate hexahydrate (Ⅱ) ammonium (ammonium ferrous sulfate) Molecular formula. (NH4) 2Fe (SO4) 2 · 6H2O Molecular weight. 392.14 (according to 2007 international relative atomic mass)

1 Scope

This standard specifies the chemical reagent iron sulfate hexahydrate (Ⅱ) ammonium traits, specifications, testing, packaging and inspection rules and signs. This standard applies to chemical agents in the iron sulfate hexahydrate (Ⅱ) ammonium test.

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 chemical reagents for 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 9724 General rule for determination of pH chemical reagent (GB/T 9724-2007, ISO 6353-1. 1982, NEQ) GB/T 9727 General method for the determination of phosphate chemical reagent (GB/T 9727-2007, 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 15346 chemical reagent packaging and marking HG/T 3921 Chemicals sampling and acceptance rules

3 Characters

The reagent is light blue green crystal, gradually oxidized in air. Dissolved in water, soluble in alcohol.

4 Specification

Iron sulfate hexahydrate (Ⅱ) ammonium as shown in Table 1. Table 1 Name AR chemically pure Content [(NH4) 2Fe (SO4) 2 · 6H2O], w /% ≥99.5 ≥99.0 pH value (50g/L, 25 ℃) 3.0 ~ 5.0 3.0 ~ 5.0 Water-insoluble, w /% ≤0.005 ≤0.02 Chloride (Cl), w /% ≤0.001 ≤0.005 ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 661-2011_English be delivered?

Answer: Upon your order, we will start to translate GB/T 661-2011_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 661-2011_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 661-2011_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 661-2011?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 661-2011 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.