Download or read book SN T 1888 4 2007 Translated English of Chinese Standard SNT 1888 4 2007 SN T1888 4 2007 SNT1888 4 2007 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2014-03-17 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: SNT 1888.4-2007 specifies hygiene standards and analytical methods for products of polyethylene used for export and import irradiated food packaging. This Standard applies to containers, packaging container and food industrial equipments, which uses polyethylene resin as raw material, of import and export irradiated food.

Download or read book SN T 0481 7 2007 Translated English of Chinese Standard SN T 0481 7 2007 SNT0481 7 2007 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2022-10-08 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Part of SN/T 0481 specifies inductively coupled plasma atomic emission spectrometry (hereinafter referred as ICP-AES), the method to determine ferric oxide (Fe2O3), titanium dioxide (TiO2), silicon dioxide (SiO2), calcium oxide (CaO), magnesium oxide (MgO) content in bauxite. This Part is applicable to the determination of Fe2O3, TiO2, SiO2, CaO, MgO content in bauxite.

Download or read book QB T 1888 1993 Translated English of Chinese Standard QBT1888 1993 written by https://www.chinesestandard.net and published by www.ChineseStandard.net. This book was released on 2021-09-03 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: This standard specifies the product classification, technical requirements, test methods, inspection rules, markings, packaging, transportation, storage of spokes and nipples for bicycles. This standard is applicable to the spokes and nipples of different materials for bicycles, which are specified in QB 1714 "Bike - Naming preparation methods and models".

Download or read book TB T 2843 2007 Translated English of Chinese Standard TBT 2843 2007 TB T2843 2007 TBT2843 2007 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2015-10-05 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Standard specifies classification, basic performances, requirements, test methods, inspection rules, marking, packaging, storage and transportation of elastic rubber parts for railways. This Standard applies to elastic rubber parts for shock absorption, buffer, flexible connection, limiting, etc. in hanging system, equipment installation system, connection, limiting positions, etc. of railways.

Download or read book TB T 3189 2007 Translated English of Chinese Standard TBT 3189 2007 TB T3189 2007 TBT3189 2007 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2017-01-17 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: This standard specifies the terms and definitions AND technical requirements for the axle counter application system. This standard is applicable to the automatic block, automatic inter-station block, and inter-station interlock system which are composed of the axle counter track inspection device. It is the technical criterion for researching, designing, manufacturing and using.

Download or read book YS T 575 6 2007 Translated English of Chinese Standard YST 575 6 2007 YS T575 6 2007 YST575 6 2007 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2020-02-09 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Part specifies the determination of titanium dioxide content in bauxite. This Part is applicable to the determination of titanium dioxide content in bauxite; the determination range is 0.50%~8.00%.

Download or read book YS T 252 4 2007 Translated English of Chinese Standard YS T 252 4 2007 YST252 4 2007 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2024-06-04 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: This standard specifies the method for determination of copper content in high nickel matte. This standard is applicable to the determination of copper content in high nickel matte. Measuring range: 6% ~ 55%. 2 Method summary The sample is decomposed with hydrochloric acid and nitric acid-potassium chlorate saturated solution. The ammonium bifluoride is used to mask the iron and the solution is controlled at pH3.5 ~ pH4. Potassium iodide is added, to cause the copper to precipitate copper iodide and precipitate an equal amount of iodine. Use the starch solution as an indicator; use sodium thiosulfate standard titration solution to indirectly determine the amount of copper. 3 Reagents 3.1 Ammonium bifluoride. 3.2 Potassium iodide. 3.3 Ammonia water (¦Ñ0.90 g/mL). 3.4 Hydrochloric acid (¦Ñ1.19 g/mL). 3.5 Nitric acid (¦Ñ1.42 g/mL). 3.6 Nitric acid (1 + 1). 3.7 Sulfuric acid (1 + 1). 3.8 Urea saturated solution. 3.9 Potassium sulfate solution (100 g/L). YS/T 252.4-2007 www.ChineseStandard.net ? Buy True-PDF ? Auto-delivery. Page 6 of 9 3.10 Nitric acid-potassium chlorate saturated solution: Dissolve potassium chlorate in nitric acid (3.5) until saturated. 3.11 Starch solution (5 g/L). 3.12 Copper standard solution: Accurately weigh 1.0000 g of metallic copper (mass fraction of copper ¡Ý 99.95%). Place it in a 400 mL beaker. Add 20 mL of nitric acid (3.6). Dissolve at low temperature and evaporate to a viscous state. Cool it. Add 5 mL of sulfuric acid (3.7). Heat until a lot of white smoke comes out. Cool it slightly. Add water to boil to dissolve the salts. Cool to room temperature. Pipette it into a 1000 mL volumetric flask. Use water to make the volume reach to the mark. 1 mL of this solution contains 1.0 mg of co

Download or read book QC T 476 2007 Translated English of Chinese Standard QCT 476 2007 QC T476 2007 QCT476 2007 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2019-03-16 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Standard specifies the rain proof performance limit and test method for bus. This Standard is applicable to various buses specified in GB/T 3730.1-2001 Motor vehicles and trailers - Types - Terms and definitions. Special vehicles modified by bus, cars with cabs and enclosed cars can be referred to this Standard for implementation.

Download or read book YS T 252 5 2007 Translated English of Chinese Standard YS T 252 5 2007 YST252 5 2007 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2024-06-05 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Part specifies the method for determination of sulfur content in high nickel matte. This Part is applicable to the determination of sulfur content in high nickel matte. Measuring range: 15% ~ 25%. 2 Method summary The sample uses copper wire as flux and burns in air flow at 1250 ¡ãC ~ 1300 ¡ãC, to convert sulfur into sulfur dioxide. It is absorbed and oxidized into sulfuric acid by hydrogen peroxide. Methyl red-methylene blue solution is used as a mixed indicator. Use sodium hydroxide standard titration solution to make titration, until the solution changes from purple to bright green, which is taken as the end point. 3 Reagents 3.1 Copper wire (mass fraction of copper ¡Ý 99.95%, diameter 0.25 mm ~ 0.5 mm). 3.2 Acid absorption solution (potassium dichromate-sulfuric acid solution): Heat and dissolve 5 g of potassium dichromate with a small amount of water. After cooling, add 100 mL of sulfuric acid. 3.3 Desiccant: Anhydrous calcium chloride. 3.4 Alkali absorption solution: Sodium hydroxide (50 g/L). 3.5 Phenolphthalein indicator (10 g/L), ethanol solution. 3.6 Methyl red-methylene blue mixed indicator: Weigh 0.3 g of methyl red and 0.25 g of methylene blue. Dissolve in 500 mL of absolute ethanol. 3.7 Hydrogen peroxide absorption solution (pre

Download or read book GB T 13810 2007 Translated English of Chinese Standard GBT 13810 2007 GB T13810 2007 GBT13810 2007 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2017-10-22 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Standard specifies the requirements, test methods, inspection rules and marks, packaging, transport, storage and order (or contact) for wrought titanium, TC4 alloy, TC4ELI alloy, TC20 (Ti-6Al-7Nb) alloy processing materials used for surgical implants.

Download or read book GB T 3620 2 2007 Translated English of Chinese Standard GBT 3620 2 2007 GB T3620 2 2007 GBT3620 2 2007 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2019-07-12 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Part specifies the permissible variations of chemical composition for titanium and titanium alloy pressure wrought products (plates, strips, foils, tubes, rods, wires, forging stocks, and profiles). This Part applies to the check analysis of chemical composition for titanium and titanium alloy pressure wrought products. This Part does not apply to the analysis of exit-factory products of the production plant. This Part does not apply to the check analysis of changes in the content of impurity elements (such as hydrogen, nitrogen, oxygen) caused by the reprocessing of the product by the purchaser.

Download or read book JB T 7155 2007 Translated English of Chinese Standard JBT 7155 2007 JB T7155 2007 JBT7155 2007 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2014-03-11 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: JBT 7155-2009 specifies the wheel for wheeled construction machinery - type, marks, requirements, test methods, inspection provisions, signs, packaging, transport and storage. This Standard applies to wheel for wheeled construction machinery.

Download or read book YS T 252 2 2007 Translated English of Chinese Standard YS T 252 2 2007 YST252 2 2007 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2024-06-03 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Part specifies the method for determination of iron content in high nickel matte. This Part is applicable to the determination of iron content in high nickel matte. Measuring range: 0.5% ~ 7%. 2 Method summary The sample is decomposed with hydrochloric acid, nitric acid-potassium chlorate saturated solution. In the hydrochloric acid medium of pH1.5 ~ pH3.0, iron (III) and sulfosalicylic acid form a reddish-brown complex, whose absorbance is measured at the wavelength of 545 nm with a spectrophotometer. Calculate the iron content according to the standard curve method. 3 Reagents 3.1 Hydrochloric acid (¦Ñ1.19 g/mL). 3.2 Hydrochloric acid (1 + 3). 3.3 Nitric acid (¦Ñ1.42 g/mL). 3.4 Ammonia (1 + 3). 3.5 Nitric acid-potassium chlorate saturated solution: Dissolve potassium chlorate in nitric acid (3.3) until saturated. 3.6 Sulfosalicylic acid solution (100 g/L): Weigh 10 g of sulfosalicylic acid. Dissolve it in water and dilute it to 100 mL. Adjust it to about pH2 with ammonia water (3.4). 3.7 Iron standard solution: Weigh 0.1500 g of metallic iron (mass fraction of iron ¡Ý 99.9%). Place it in a 250 mL beaker. Add 20 mL of nitric acid (1 + 1). Heat to completely dissolve. Boil to drive out nitrogen oxides. Remove it. Cool to room temperature. Transfer to a 1000 mL volumetric flask. Use water to make the volume reach to the mark. 1 mL of this solution contains 0.15 mg of iron. YS/T 252.2-2007 www.ChineseStandard.net ? Buy True-PDF ? Auto-delivery. Page 6 of 8 4 Instruments Spectrophotometer. 5 Analytical procedures 5.1 Sample Weigh 0.400 g of sample, accurate to 0.0001

Download or read book JB T 6758 4 2007 Translated English of Chinese Standard JBT 6758 4 2007 JB T6758 4 2007 JBT6758 4 2007 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2017-11-04 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Part of JB/T 6758 specifies the general requirements for heat resistant continuously transposed conductors of enamelled copper wires. Such as polyester fiber non-woven fabric strip insulated Grade-155 modified polyester continuously transposed conductors of enamelled copper wire (referred to as non-woven fabric continuously transposed conductor); aromatic polyamide paper-insulated Grade-180 polyester imide or Grade-200 polyester imide/polyamideimide composite continuously transposed conductor of enamelled copper wire and semi-hard conductor (referred to as aromatic polyamide continuously transposed conductor), etc. Enamelled rectangular copper wire copper conductor can be either ordinary soft copper wire or semi-hard copper wire.

Download or read book YS T 252 1 2007 Translated English of Chinese Standard YS T 252 1 2007 YST252 1 2007 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2024-06-03 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Part specifies the method for determination of nickel content in high nickel matte. This Part is applicable to the determination of nickel content in high-nickel matte. Measuring range: 20% ~ 80%. 2 Method summary The sample is decomposed with hydrochloric acid or nitric acid-potassium chlorate saturated solution. In the ammonia medium, nickel and diacetyl oxime form a red nickel diacetyl oxime precipitate, which is separated from other impurity elements. The precipitate is filtered, washed, and dried to constant weight; the amount of nickel is calculated. The amount of nickel in the mixed filtrate is extracted with chloroform under pH6.5, separated from other impurities, measured using diacetyl oxime spectrophotometry and then corrected. 3 Reagents 3.1 Hydrochloric acid (¦Ñ1.19 g/mL). 3.2 Hydrochloric acid (1 + 1). 3.3 Hydrochloric acid (1 + 24). 3.4 Nitric acid (¦Ñ1.42 g/mL). 3.5 Nitric acid (1 + 1). 3.6 Sulfuric acid (¦Ñ1.83 g/mL). 3.7 Ammonia (1 + 1). 3.8 Chloroform. 3.9 Nitric acid-potassium chlorate saturated solution: Dissolve potassium chlorate in YS/T 252.1-2007 www.ChineseStandard.net ? Buy True-PDF ? Auto-delivery. Page 6 of 10 nitric acid (3.4) until saturated. 3.10 Potassium sodium tartrate solution (200 g/L), filter it before use. 3.11 Ammonium acetate solution (200 g/L), filter it before use. 3.12 Sodium thiosulfate solution (200 g/L), filter it before use. 3.13 Dimethylglyoxime ethanol solution (10 g/L), filter it before use. 3.14 Dimethylglyoxime-sodium hydroxide solution (10 g/L): Dissolve 15 g of sodium hydroxide in 100 mL of water. After cooling to room temperature, dissolve 1 g of dimethylglyoxime in the solution. Mix well. 3.15 Ferric persulfate solution (50 g/L). 3.16 Nickel standard stock solution: Weigh 0.1000

Download or read book QB T 2119 2007 Translated English of Chinese Standard QBT2119 2007 written by https://www.chinesestandard.net and published by www.ChineseStandard.net. This book was released on 2021-09-03 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: This standard specifies the terms and definitions, requirements, test methods, inspection rules and signs, packaging, transportation, storage, shelf life of basic candles. This standard applies to candles, which are processed with paraffin wax and/or vegetable wax as the main raw material.

Download or read book JB T 5000 9 2007 Translated English of Chinese Standard JB T 5000 9 2007 JBT5000 9 2007 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2023-02-21 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: This part of JB/T 5000 specifies general requirements of cutting and tolerance without indication; and specific requirements on key groove, hole diameter and hole distance, center hole, tolerance without indication and allowed shape of cutter, etc. This part is applicable to cutting of heavy machinery product parts. All the product drawings and technical documents, if without special requirements, shall meet the requirements of this part.