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GB/T 2441.4-2010 English PDF

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Q: Should I purchase the latest version GB/T 2441.4-2010?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 2441.4-2010 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.

US$139.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 2441.4-2010: Determination of urea -- Part 4: Iron content. 1, 10-Phenanthroline spectrophotometric method
Status: Valid

GB/T 2441.4: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 2441.4-2010	139	Add to Cart	3 days	Determination of urea -- Part 4: Iron content. 1, 10-Phenanthroline spectrophotometric method	Valid
GB/T 2441.4-2001	199	Add to Cart	2 days	Determination of urea Determination of iron content 1, 10-Phenanthroline spectrophotometric method	Obsolete

Similar standards

GB/T 2441.8 GB/T 2441.7 GB 8569 GB/T 2441.5 GB/T 2441.6 GB/T 2441.3

Basic data

Standard ID: GB/T 2441.4-2010 (GB/T2441.4-2010)
Description (Translated English): Determination of urea -- Part 4: Iron content. 1, 10-Phenanthroline spectrophotometric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G20
Classification of International Standard: 65.080
Word Count Estimation: 6,682
Date of Issue: 2010-06-30
Date of Implementation: 2011-01-01
Older Standard (superseded by this standard): GB/T 2441.4-2001
Quoted Standard: HG/T 2843
Adopted Standard: ISO 6685-1982, MOD
Regulation (derived from): National Standard Approval Announcement 2010 No.2 (Total No.157)
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 phenanthroline spectrophotometry-Determination of iron content in urea. This section applies to the determination of iron content of urea from ammonia and carbon dioxide synthesis obtained.

GB/T 2441.4-2010: Determination of urea -- Part 4: Iron content. 1, 10-Phenanthroline spectrophotometric method

---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.
Determination of urea Part 4. Iron content 1, 10-Phenanthroline spectrophotometric method ICS 65.080 G20 National Standards of People's Republic of China Replacing GB/T 2441.4-2001 Determination of urea Part 4. iron content Phenanthroline spectrophotometry Part 4. Ironcontent-1,10-Phenanthrolinespectrophotometricmethod (ISO 6685. 1982, Chemicalproductsforindustrialuse- 1,10-Phenanthrolinespectrophotometricmethod, MOD) Issued on. 2010-06-30 2011-01-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 2441 "Determination of urea" is divided into nine sections. --- Part 1. total nitrogen content; --- Part 2. biuret content spectrophotometry; --- Part 3. Moisture Karl Fischer method; --- Part 4. iron content - Phenanthroline spectrophotometric method; --- Part 5. alkalinity volumetric method; --- Part 6. Water-insoluble content - Gravimetric method; --- Part 7. particle size sieving; --- Part 8. sulphate content Visible turbidimetric method; --- Part 9. methylene diurea content spectrophotometry. This section GB/T 42441 Part of. The partial modification of the use of ISO 6685. 1982 (E) "industrial chemicals common method determination of iron content - Phenanthroline spectrophotometric method." This part of ISO 6685. 1982 (E) technical differences are as follows. --- Reagents and reagent solution on the part of solution concentration were modified; --- Instrument absorption cell modified to 3cm or 1cm. This Part replaces GB/T 2441.4-2001 "Determination of urea Determination of iron content - Phenanthroline spectrophotometric method." This section compared with the GB/T 2441.4-2001 main changes are as follows. --- Remove the ISO foreword. This part is proposed by the China Petroleum and Chemical Industry Association. This part of the National Standardization Technical Committee and soil conditioners Fertilizers (SAC/TC105) centralized. This section drafted by. National Fertilizer Quality Supervision and Inspection Center (Shanghai). The main drafters of this section. Zhang truth, room Four. This part of the standard replaces the previous editions are. --- GB/T 2445-1981, GB/T 2445-1991, GB/T 2441.4-2001. Determination of urea Part 4. iron content Phenanthroline spectrophotometry

1 Scope

This section GB/T 2441 regulations using phenanthroline spectrophotometric determination of iron content in industrial use of urea. This section applies to the determination of iron content of urea from ammonia and carbon dioxide synthetically produced.

2 Normative references

The following documents contain provisions which, through reference in this text, constitute provisions of this part. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this section, however, encourage the parties to this part of the research agreement Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this section. HG/T 2843 fertilizer products for chemical analysis commonly used standard titration solution, standard solution, reagent solution and indicator solution Principle 3 With ascorbic acid test solution of ferric ions are reduced to divalent iron ions, at a pH of 2 to 9 (the pH value of the selection criteria 4.5), a divalent iron ions with phenanthroline generated orange-red complexes, the absorption wavelength at 510nm, absorbance was measured with a spectrophotometer.

4 Reagents and solutions

The following part-corrosive reagents and solutions, the operator should be careful! If spilled on the skin, immediately wash with water or suitable Way to deal with severe cases should be treated immediately. As used in this section reagent solution and water, in the specifications and method of preparation is not specified, it shall comply with the provisions of HG/T 2843's. 4.1 hydrochloric acid solution, 11; 4.2 ammonia solution, 11; 4.3 acetic acid - sodium acetate buffer solution, pH≈4.5; 4.4 ascorbic acid solution, 20g/L (the solution lifespan 1Od); 4.5 phenanthroline solution, 2g/L; 4.6 iron standard solution, 0.100mg/mL; 4.7 iron standard solution, 0.010mg/mL, iron standard solution (4.6), diluted 10 times, only to use that day.

5 Instruments

5.1 usually laboratory instruments; 5.2 Spectrophotometer with 3cm or 1cm absorption cell. Step 6 Analysis Do two parallel determination of sample. Draw standard curve 6.1 6.1.1 Preparation of standard colorimetric solution As shown in Table 1, seven 100mL flask, were added to a given volume of iron standard solution (4.7). ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 2441.4-2010_English be delivered?

Answer: Upon your order, we will start to translate GB/T 2441.4-2010_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 2441.4-2010_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 2441.4-2010_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 2441.4-2010?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 2441.4-2010 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.