GB 28656-2012 English PDFUS$239.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB 28656-2012: [GB/T 28656-2012] Calcium nitrite for industrial use Status: Valid
Basic dataStandard ID: GB 28656-2012 (GB28656-2012)Description (Translated English): [GB/T 28656-2012] Calcium nitrite for industrial use Sector / Industry: National Standard Classification of Chinese Standard: G12 Classification of International Standard: 71.060.50 Word Count Estimation: 9,993 Quoted Standard: GB 190-2009; GB/T 191-2008; GB/T 6678; GB/T 6682-2008; GB/T 8170; HG/T 3696.1; HG/T 3696.3 Regulation (derived from): National Standards Bulletin No. 24 of 2012 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 Chinese standard specifies the technical requirements of industrial calcium nitrite, test methods, inspection rules, marking, labeling, packaging, transportation, storage, and security. This standard applies as cement additives, anti- trap agent, ant GB 28656-2012: [GB/T 28656-2012] Calcium nitrite for industrial use---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.Calcium nitrite for industrial use ICS 71.060.50 G12 National Standards of People's Republic of China Industrial calcium nitrite Published 2012-09-03 2013-06-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China issued ForewordThis standard Chapter 7, Chapter 8 and Chapter 9 is mandatory, the rest are recommended. This standard was drafted in accordance with rules GB/T 1.1-2009 given. The standard proposed by China Petroleum and Chemical Industry Federation. This standard by the National Standardization Technical Committee chemical inorganic chemicals branch (SAC/TC63/SC1). This standard was drafted. CNOOC Tianjin Chemical Research & Design Institute, Chemical Co., Ltd. Shan Xi Kai Xi grams. The main drafters of this standard. Li Guangming, Jia Siqian. Industrial calcium nitrite1 ScopeThis standard specifies the technical requirements, test methods, inspection rules industrial calcium nitrite, marking, labeling, packaging, transportation, storage, and security. This standard applies to industrial calcium nitrite as cement additives, rust inhibitors, antifreeze agents, detergents heavy oil, lubricating oil raw materials such as an emulsifier.2 Normative referencesThe following documents for the application of this document is essential. For dated references, only applies to the version dated paper Pieces. For undated references, the latest edition (including any amendments) applies to this document. GB 190-2009 dangerous goods packaging logo GB/T 191-2008 Packaging Pictorial signs GB/T 6678 General Principles for Sampling Chemical Products GB/T 6682-2008 specifications and test methods for water analysis laboratory GB/T 8170 rounding off means about rules and determining limiting values Preparation HG/T 3696.1 Inorganic chemicals for chemical analysis of standard titration solution Preparations with HG/T 3696.3 Inorganic chemicals Chemical Analysis Molecular formula and molecular weight 3 Molecular formula. Ca (NO2) 2 Molecular weight. 132.09 (according to 2007 international relative atomic mass)4 Requirements4.1 Appearance. white powder. 4.2 Industrial calcium nitrite should meet the requirements of Table 1. Table 1 project index First grade Qualified Calcium nitrite [Ca (NO2) 2] (dry basis) w /% ≥ 92.0 90.0 Calcium nitrate (dry basis) w /% ≤ 5.5 6.5 Moisture w /% ≤ 0.8 1.0 Water insoluble matter w /% ≤ 1.0 1.05 Test methods5.1 Safety Tips Reagents used in this test method corrosive or toxic, the operator must be careful as water splashed on the skin immediately Flushing, severe cases should seek medical care immediately. When using flammable materials, it prohibited the use of open flame heating. 5.2 General Provisions This standard reagents and water, in the absence of other requirements specified, refer to the specified three analytical reagents and GB/T 6682-2008 Grade water. Standard Solution, test preparations and products desired, in the absence of other requirements specified, are by HG/T 3696.1, Preparation predetermined HG/T 3696.3 is. 5.3 Visual inspection Under natural light conditions, it was visually determined. 5.4 Determination of the content of calcium nitrite 5.4.1 Method summary In acidic solution, using potassium permanganate oxidation of calcium nitrite. The consumption of permanganate was calculated standard titration solution of calcium nitrite content. 5.4.2 Reagents 5.4.2.1 sulfuric acid solution. 892. The sulfuric acid solution was heated to about 70 ℃ ± 2 ℃, was added dropwise a solution of potassium permanganate standard solution was titrated to a pale pink up. cool down, spare. 5.4.2.2 sulfuric acid. 15. Preparation method with 5.4.2.1. 5.4.2.3 standard potassium permanganate titration solution. c (15KMnO4 ) ≈0.1mol/L. 5.4.2.4 sodium oxalate standard titration solution. c (12Na2C2O4 ) ≈0.1mol/L. 5.4.2.4.1 preparation Weigh about 6.7g sodium oxalate dissolved in 120mL of sulfuric acid solution (5.4.2.1) diluted with water to 1000mL, shake. 5.4.2.4.2 Calibration Pipette with a pipette 25.0mL sodium oxalate standard titration solution, sulfuric acid solution was added 100mL (5.4.2.1), using a standard potassium permanganate Titration titration, was heated to near the end point 65 ℃ ± 2 ℃, pale pink solution was titrated to continue holding 30s. At the same time as a blank test. 5.4.2.4.3 computing Standard solution concentration of sodium oxalate titration accurate value of c, units of moles per liter (mol/L), calculated according to formula (1). c = (V1-V2) c1 (1) Where. Accurate value of C1 --- potassium permanganate solution concentration standard titration, expressed in moles per liter (mol/L); Potassium permanganate solution consumed by standard titration Vl --- titration volume when the value in milliliters (mL); Potassium permanganate solution consumed by standard titration volume when the blank titration value V2 ---, milliliters (mL); V --- Pipette Calibration of the sodium oxalate standard titration solution volume value in milliliters (mL). 5.4.3 Analysis of step 5.4.3.1 Preparation of test solution Weigh at 105 ℃ ± 2 ℃ dried to constant mass 2g of sample, accurate to 0.0002g, was placed in a 250mL beaker, add water-soluble solution. All into 500mL volumetric flask, dilute with water to the mark. 5.4.3.2 Determination In 300mL Erlenmeyer flask, with a burette was added dropwise from about 38mL ~ 40mL potassium permanganate standard titration solution. With pipette 25mL of the test solution, sulfuric acid solution was added 10mL (5.4.2.2), heated to 40 ℃ ± 2 ℃. Sodium was added with a pipette 20mL grass Standard Solution, continue shaking the solution became clear, and then heated to 70 ℃ ~ 80 ℃, titration with potassium permanganate standard solution was titrated to dissolve Pale pink liquid and keep the 30s not disappeared. 5.4.4 calculation results Calcium nitrite, calcium nitrite content of [Ca (NO2) 2] w1 mass fraction basis, according to equation (2). w1 = [(V1c1-V2c2)/1000] × M m × (25/500) × 100% (2) Where. Vl --- titration test solution was added potassium permanganate consumption of the total volume of the solution of the standard titration value in milliliters (mL); Accurate value of C1 --- potassium permanganate solution concentration standard titration, expressed in moles per liter (mol/L); --- value V2 standard titration solution was added sodium oxalate volume in milliliters (mL); Accurate value of the concentration of the solution C2 --- sodium oxalate standard titration, expressed in moles per liter (mol/L); Value m --- mass of the sample in grams (G); M --- calcium nitrite [14Ca Value (NO2) 2] molar mass in grams per mole (g/mol) (M = 33.02). Parallel to the arithmetic average of the measurement results of the measurement result, the absolute difference determination results parallel to not more than 0.2%. 5.5 Determination of the content of calcium nitrate 5.5.1 Method summary Methanol was added to the test solution, methyl nitrite and nitrite generated in the presence of sulfuric acid. Removed by evaporation. Was added an excess of sulfur Acid, ferrous ammonium calcium nitrate reduction, back titration with potassium permanganate titration standard solution. 5.5.2 Reagents 5.5.2.1 sodium sulfate. 5.5.2.2 methanol. 5.5.2.3 sulfuric acid. 5.5.2.4 sulfuric acid. 15. 5.5.2.5 sodium hydroxide solution.200g/L. 5.5.2.6 sodium hydroxide solution. 1g/L. 5.5.2.7 ammonium ferrous sulfate solution. c [Fe (NH4) 2 (SO4) 2] ≈0.2mol/L. Weigh about 80g of ferrous ammonium sulfate [(Fe (NH4) 2 (SO4) 2 · 6H2O)], was dissolved in 300mL sulfuric acid solution (18), plus 700mL of water, shake, stored in a brown bottle. 5.5.2.8 standard potassium permanganate titration solution. c (15KMnO4 ) ≈0.1mol/L. 5.5.2.9 phenolphthalein indicator solution. 10g/L. 5.5.3 Analysis of step 5.5.3.1 Preparation of test solution Weigh about 5g sample, accurate to 0.0002g, was placed 250mL beaker was added 100mL of water dissolved, about 7.5g sodium sulfate, stirred Mix well. The entire test solution and precipitate into 250mL volumetric flask, diluted with water to the mark. When using dry filter, before going to abandon 20mL filtrate. 5.5.3.2 Preparation of the blank test solution But without addition of the sample, the other reagent is added and the solution prepared in the same test solution, and simultaneously the same treatment. 5.5.3.3 Determination The filtrate with the pipette and pipette 25mL of the test solution was placed in the blank test solution were 500mL conical flask, add 10mL A Alcohol, sulfuric acid solution was added dropwise 15mL (5.5.2.4) at a constantly shaking, controlling the rate of addition of sulfuric acid solution, methyl nitrite generation not allow too fierce. The inner wall of the conical flask was washed with water, heating the micro-boiling 2min. After cooling, add 2 drops of phenolphthalein indicator solution, with sodium hydroxide solution (5.5.2.5) Up to a pale pink and [near the end point, with sodium hydroxide solution (5.5.2.6) and]. The solution was evaporated under gentle boiling to 10mL ~ 15mL. Cooled, washed with small amount of water to the inner wall of the bottle. Pipette 25mL of ferrous ammonium sulfate solution was added, under continuously shaking, the bottle wall along Xu Xu sulfuric acid was added 25mL (5.5.2.3). Heating, micro-boiling solution turned from brown to bright yellow so far. Remove the flasks were cooled rapidly to At room temperature. Added 250mL of water, titrated to standard titration solution with potassium permanganate solution and keep the pale pink 30s not disappeared. 5.5.4 calculation results Calcium nitrate content of calcium nitrate [Ca (NO3) 2] w2 mass fraction basis, calculated according to formula (3). w2 = [(V0-V1)/1000] × c × M m × [(100-w3)/100] × 25/250 × 100% (3) Where. Value V0 standard titration solution volume --- potassium permanganate solution consumed in blank test, in milliliters (mL); Numerical standard titration solution volume Vl --- potassium permanganate consumed in the test solution, in milliliters (mL); Accurate value of c --- potassium permanganate solution concentration standard titration, expressed in moles per liter (mol/L); W3 --- 5.6 measured by moisture exact number, values are expressed in%; Value m --- mass of the sample in grams (G); --- M calcium nitrate [12Ca Value (NO3) 2] molar mass in grams per mole (g/mol) (M = 27.30). Parallel to the arithmetic average of the measurement results of the measurement result, the absolute difference determination results parallel to no more than 0.05%. 5.6 Determination of Moisture 5.6.1 instruments and equipment 5.6.1.1 weighing bottle. φ40mm × 25mm. 5.6.1.2 Electric oven. temperature can be controlled at 105 ℃ ± 2 ℃. 5.6.2 Analysis of step Weigh about 5g sample, accurate to 0.0002g. Under previously placed at ± 105 ℃ 2 ℃ dried to constant mass in the weighing bottle, in 105 ℃ ± 2 ℃ electric oven dried to constant mass. 5.6.3 The result of the calculation The mass fraction of water in terms w3, calculated according to formula (4). w3 = m-m1m × 100% (4) Where. M1 --- dried sample material mass value in grams (G); Value m --- mass of the sample in grams (g). Parallel to the arithmetic average of the measurement results of the measurement result, the absolute difference determination results parallel to no more than 0.05%. 5.7 Determination of water-insoluble matter content 5.7.1 Reagents and materials 5.7.1.1 hydrochloric acid. 5.7.1.2 Starch - iodide test paper. 5.7.2 instruments and equipment 5.7.2.1 sintered glass crucible. pore size filtration plate 5μm ~ 15μm. 5.7.2.2 Electric oven. temperature can be controlled at 105 ℃ ± 2 ℃. 5.7.3 Analysis of step Weigh about 25g sample accurately to 0.1g, was placed in 500mL beaker, 250mL of water was added to dissolve. ± previously used at 105 ℃ 2 ℃ Dried to constant mass sintered glass filter crucible. Washed with hot water until no nitrite ions up (taking about 20mL washing liquid, add 2 drops Hydrochloric acid, starch - KI dipstick test). The sintered glass crucible placed together along with the filter cake 105 ℃ ± 2 ℃ in the electric oven And dried to constant mass. 5.7.4 calculation results Water insoluble fraction mass in terms w4, calculated according to formula (5). w4 = m1-m2m × 100% (5) Where. Numerical M1 --- water insoluble crucible and sintered glass crucible by mass, in grams (G); --- M2 values quality glass crucible crucible sand in grams (G); Value m --- mass of the sample in grams (g). Parallel to the arithmetic average of the measurement results of the measurement result, the absolute difference determination results parallel to not more than 0.01%.6 Inspection RulesIndicators specified in the items listed in 6.1 are standard factory inspection items should be tested batches. 6.2 with the same material, the same basic production conditions, continuous production of the same team or the same level of industrial production of calcium nitrite as a group. Each batch of products is not more than 60t. Unit 6.3 determines the number of samples required to GB/T 6678's. When sampling, the sampling bag is inserted from above to a depth of four layers Three sampling points. The sampled product mix, by quartering reduced to about 400g, immediately dispensed into two clean and dry jar (or plastic Bag), the seal pasted on bottles (bags) label stating. manufacturer name, product name, grade, batch number and date of sampling, sample's name. one Bottles (bags) for testing, further bottles (bags) stored for future reference, the storage time is determined by the manufacturer according to the actual situation. 6.4 If the test results are indicators do not meet this standard, should be re-double the amount from the bag sampling retest, retest results Even when there is an indicator does not meet the requirements of this standard, the entire batch of product is substandard. Rounding value comparison method using 6.5 GB/T 8170 test results determines whether a predetermined standard. 7 signs, labels 7.1 Industrial calcium nitrite on bags have a strong clear signs, including. manufacturer's name and address, product name, grade, net content, Or batch production date, the standard number, and "oxidizing agent" and "toxic substances" flag and the predetermined GB 190-2009 GB/T 191-2008 under "afraid of the sun" and "afraid of the rain" logo. 7.2 each batch of industrial calcium nitrite should be accompanied by a certificate of quality, including. manufacturer's name and address, product name, grade, containing a net Amount, date of production and batch number or standard number. 8 packaging, transport and storage 8.1 Calcium nitrite using double packaging industry, the packaging is polyethylene bag, packed in plastic bags. Net weight 25kg. 8.2 Industrial calcium nitrite package closure, internal pockets are fastened with a rope or cord twice Vinalon other comparable quality, or with its equivalent Otherwise sealed; Vinylon outer bag with strings or other equivalent mass of the slot line, should be securely sutured. 8.3 industrial calcium nitrite during transportation vehicle should be placed in the shade canopy rail boxcar or other transportation lid. Not with strong oxidizing Agent, a strong reducing agent, mixed transport inflammable and explosive materials. 8.4 industrial calcium nitrite should be stored in a cool, dry place to prevent moisture, heat, and sunlight.9 Security9.1 Industrial calcium nitrite and reductant, organic, combustible mixture can form explosive mixtures. At the same time also an industrial calcium nitrite Weak reducing agent, reacts violently with strong oxidants occur. Samples should be someone for safekeeping. Calcium nitrite at 9.2 Industrial pyrolysis, releasing toxic nitrogen oxide gas. The laboratory should have gas masks and other protective gear. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB 28656-2012_English be delivered?Answer: Upon your order, we will start to translate GB 28656-2012_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 28656-2012_English with my colleagues?Answer: Yes. The purchased PDF of GB 28656-2012_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+ countriesQuestion 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. |
