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GB/T 2441.6-2010 English PDF

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GB/T 2441.6-2010: Determination of urea -- Part 6: Water insoluble matter content -- Weight method
Status: Valid

GB/T 2441.6: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 2441.6-2010English169 Add to Cart 3 days [Need to translate] Determination of urea -- Part 6: Water insoluble matter content -- Weight method Valid GB/T 2441.6-2010
GB/T 2441.6-2001English199 Add to Cart 2 days [Need to translate] Determination of urea Determination of water in solution matter content Weight method Obsolete GB/T 2441.6-2001

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Basic data

Standard ID GB/T 2441.6-2010 (GB/T2441.6-2010)
Description (Translated English) Determination of urea -- Part 6: Water insoluble matter content -- Weight method
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G20
Classification of International Standard 65.080
Word Count Estimation 7,775
Date of Issue 2010-06-30
Date of Implementation 2011-01-01
Older Standard (superseded by this standard) GB/T 2441.6-2001
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 method for the determination of the weight of the water-insoluble content of industrial urea. This section applies to the determination of water-insoluble content of urea from ammonia and carbon dioxide synthesis obtained.

GB/T 2441.6-2010: Determination of urea -- Part 6: Water insoluble matter content -- Weight 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 6. Water insoluble matter content Weight method ICS 65.080 G20 National Standards of People's Republic of China Replacing GB/T 2441.6-2001 Determination of urea Part 6. Water-insoluble content Gravimetric method Part 6. Waterinsolublemattercontent- Weightmethod 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 2441 Part 6. This Part replaces GB/T 2441.6-2001 "urea Determination of water-insoluble content - Gravimetric method." 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 2447-1981, GB/T 2447-1991, GB/T 2441.6-2001. Determination of urea Part 6. Water-insoluble content Gravimetric method

1 Scope

This section GB/T 2441 specifies the method for measuring the weight of water-insoluble content of industrial urea. This section applies to the determination of urea water insoluble content from ammonia and carbon dioxide synthetically produced. Principle 2 Glass filter crucible aqueous urea solution is filtered under reduced pressure, the residue is expressed as the amount of water insoluble.

3 Instrument

3.1 usually laboratory instruments; 3.2 Glass filter crucible, No. 4 (pore diameter of 4μm ~ 16μm), volume 30mL; 3.3 Ovens; 3.4 water bath. Step 4 Analysis Do two parallel determination of sample. Laboratory samples weighing about 50g (accurate to 0.05g), the sample was dissolved in 150mL ~ 200mL of water. The solution was placed in 90 ℃ The water bath for 30min, immediately with a constant weight of No. 4 glass filter crucible hot vacuum filtration, washed with hot water residue 3 to 5 times per Times with about 15mL, remove the filter, at 105 ℃ ~ 110 ℃ constant temperature drying oven to constant weight.

5 expression analysis

Water-insoluble content w, mass fraction (%) expressed by the formula. w = m1 × 100m Where. Value m1 --- dried residue mass in grams (g); Numerical m --- sample mass, expressed in grams (g). Calculation results are shown to four decimal places, take the parallel determination results as the arithmetic mean of the measurement results.

6 allows the difference

The absolute difference between the parallel determination results is not more than 0.0050%.

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