Ys T 273 15 2012 Translated English Of Chinese Standard Ys T 273 15 2012 Yst273 15 2012
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Ys T 273 15 2012 Translated English Of Chinese Standard Ys T 273 15 2012 Yst273 15 2012
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Release Date : 2023-11-10
Ys T 273 15 2012 Translated English Of Chinese Standard Ys T 273 15 2012 Yst273 15 2012 written by https://www.chinesestandard.net and has been published by https://www.chinesestandard.net this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-11-10 with Technology & Engineering categories.
This Part of YS/T 273 specifies the X-ray fluorescence spectrometric method for the determination of contents of fluorine, aluminum, sodium, silicon, iron, sulfur, phosphorus and calcium (respectively represented by F, Al, Na, SiO2, Fe2O3, SO42-, P2O5, CaO) and other elements in cryolite using pressed powder tables. This Part is applicable to the determination of fluorine, aluminum, sodium, silicon, iron, sulfur, phosphorus, calcium and other elements in cryolite. The measurement range is shown in Table 1. Table 1
Ys T 273 13 2006 Translated English Of Chinese Standard Ys T 273 13 2006 Yst273 13 2006
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Ys T 273 13 2006 Translated English Of Chinese Standard Ys T 273 13 2006 Yst273 13 2006 written by https://www.chinesestandard.net and has been published by https://www.chinesestandard.net this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-11-09 with Technology & Engineering categories.
This Part specifies the preparation and storage of raw and dry test samples of cryolite.
Ys T 273 12 2006 Translated English Of Chinese Standard Ys T 273 12 2006 Yst273 12 2006
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Ys T 273 12 2006 Translated English Of Chinese Standard Ys T 273 12 2006 Yst273 12 2006 written by https://www.chinesestandard.net and has been published by https://www.chinesestandard.net this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-11-09 with Technology & Engineering categories.
This Part specifies the method for determination of calcium oxide content in cryolite. This Part applies to the determination of calcium oxide in cryolite. Determination range (mass fraction): ??1.25%. 2 Method summary Use perchloric acid to de-fluorinate the test portion; heat until the smoke of perchloric acid has evaporated, then use hydro
Ys T 273 2 2006 Translated English Of Chinese Standard Ys T 273 2 2006 Yst273 2 2006
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Ys T 273 2 2006 Translated English Of Chinese Standard Ys T 273 2 2006 Yst273 2 2006 written by https://www.chinesestandard.net and has been published by https://www.chinesestandard.net this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-11-10 with Technology & Engineering categories.
This Part specifies the method for determination of cryolite ignition loss. This Part applies to the determination of cryolite ignition loss. Determination range: ??6.00%. 2 Method summary The sample is burned at 550 ??C??5 ??C for 30 minutes. The amount of mass reduction after burning is the ignition loss. 3 Apparatus 3.1 High-temperature furnace: The temperature can be controlled at 550 ??C??5 ??C. 3.2 Platinum crucible: The diameter is 30 mm, the height is 40 mm, and it has a lid. 4 Test sample The sample shall comply with the requirements of 3.2 in YS/T 273.13. 5 Analysis procedure 5.1 Test portion Weigh 2.5 g of dry test sample (4), accurate to 0.0001 g. 5.2 Number of determinations Two determinations shall be carried out independently and the average value shall be taken. 5.3 Determination 5.3.1 Turn on the high-temperature furnace (3.1), adjust the furnace temperature to YS/T 273.2-2006 www.ChineseStandard.net ? Buy True-PDF ? Auto-delivery Page 6 of 7 550 ??C??5 ??C, and start the determination after the temperature remains constant for 20 minutes. 5.3.2 According to the requirements of 5.1, accurately weigh the test porti
Ys T 273 1 2020 Translated English Of Chinese Standard Ys T 273 1 2020 Yst273 1 2020
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Ys T 273 1 2020 Translated English Of Chinese Standard Ys T 273 1 2020 Yst273 1 2020 written by https://www.chinesestandard.net and has been published by https://www.chinesestandard.net this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-10-15 with Technology & Engineering categories.
This Part specifies the method for determination of moisture content in cryolite. This Part applies to the determination of moisture content in cryolite. Measuring range: ?? 1.50%. 2 Method summary After the sample is dried in the oven, the difference in mass of the sample before and after drying is calculated, which is the moisture content of the sample. 3 Instruments 3.1 Weighing bottle: The diameter is 45 mm; it is flat type, which has a lid. 3.2 Oven: It is capable of controlling the temperature at 110 ??C ?? 5 ??C. 3.3 Dryer. 4 Specimens The specimens shall be kept in a sealed container. It shall mixed thoroughly before weighing. 5 Analytical steps 5.1 Sample Weigh 5.0 g of specimen (4), accurate to 0.0001 g. 5.2 Parallel test Do two tests in parallel. Take the average value. YS/T 273.1-2020 www.ChineseStandard.net ? Buy True-PDF ? Auto-delivery. Page 6 of 7 5.3 Determination 5.3.1 Put the weighing bottle (3.1) into the oven (3.2), at 110 ??C ?? 5 ??C, to dry it for 2 hours. Cool it to room temperature, in the desiccator (3.3). Repeat this cycle, until the weight is constant. Weigh it. 5.3.2 Spread the sample (5.1) evenly on the bott
Ys T 273 16 2020 Translated English Of Chinese Standard Ys T 273 16 2020 Yst273 16 2020
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Ys T 273 16 2020 Translated English Of Chinese Standard Ys T 273 16 2020 Yst273 16 2020 written by https://www.chinesestandard.net and has been published by https://www.chinesestandard.net this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-10-15 with Technology & Engineering categories.
This Part specifies the method for determination of lithium content in cryolite. This Part applies to the determination of lithium content in cryolite. Measuring range: 0.010%~1.50%. 2 Method Summary Use perchloric acid to remove all fluorine from the test material; and then dissolve it with hydrochloric acid and water. The test solution is measured at the wavelength of 670.8 nm of the atomic absorption spectrometer using an air-acetyl block flame to measure the absorbance of lithium; and the lithium content is calculated. 3 Reagents Unless otherwise stated, only reagents and laboratory Class-III water determined to be of analytically pure are used in the analysis. 3.1 Cryolite, spectrally pure. 3.2 Perchloric acid (????1.67 g/mL). 3.3 Hydrochloric acid (1+1). 3.4 Lithium standard storage solution: Weigh 5.3228 g of lithium carbonate (spectrally pure) into a 500 mL beaker; cover with a watch plate; slowly add 125 mL of nitric acid (1+9); heat until completely dissolved; boil for a few minutes; and cool to room temperature. Transfer the solution into a 1000mL volumetric flask and dilute with water to the mark; mix well. 1mL of this solution contains 1.0mg of lithium. 3.5 Lithium standard solution: Pipette 10.00 mL of lithium standard storage solution (3.4) into a 100 mL volumetric flask; dilute to volume with water; and mix well. 1 mL of this solution YS/T 273.16-2020 www.ChineseStandard.net ? Buy True-PDF ? Auto-delivery. Page 6 of 9 contains 100??g of lithium. 4 Apparatus Atomic absorption spectrometer with lithium hollow cathode lamp. Under the best working conditions of the instrument, any instrument that can meet the following indicators can be used: --- Sensitivity: In a sol
Ys T 820 2 2012 Translated English Of Chinese Standard Ys T 820 2 2012 Yst820 2 2012
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Ys T 820 2 2012 Translated English Of Chinese Standard Ys T 820 2 2012 Yst820 2 2012 written by https://www.chinesestandard.net and has been published by https://www.chinesestandard.net this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-10-11 with Technology & Engineering categories.
This Part of YS/T 820 specifies the method for the determination of nickel content in laterite nickel ores. This Part is applicable to the determination of nickel content in laterite nickel ores. The determination range is: 0.10% ~ 3.00%.
Ys T 273 10 2006 Translated English Of Chinese Standard Ys T 273 10 2006 Yst273 10 2006
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Ys T 273 10 2006 Translated English Of Chinese Standard Ys T 273 10 2006 Yst273 10 2006 written by https://www.chinesestandard.net and has been published by https://www.chinesestandard.net this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-10-15 with Technology & Engineering categories.
This Part specifies the method for determination of alumina content in cryolite. This Part applies to the determination of alumina content in cryolite. Determination range (mass fraction): ??5.00%. 2 Method summary The fluoride salt in the test portion is dissolved in hot aluminum chloride solution; but the free Al2O3 is not dissolved. After filtering, burn and weigh. 3 Reagents 3.1 Aluminum chloride solution (130 g/L); 3.2 Acetic acid solution (1+19); 3.3 Silver nitrate solution (10 g/L). 4 Apparatus 4.1 Platinum crucible: Top diameter is about 30 mm; bottom diameter is about 20 mm; height is about 35 mm. It is equipped with platinum lid. 4.2 High-temperature furnace: It can be controlled at 900??C??20??C. 5 Test sample The test sample shall comply with the requirements of 3.3 in YS/T 273.13. YS/T 273.10-2006 www.ChineseStandard.net ? Buy True-PDF ? Auto-delivery. Page 6 of 7 6 Analytical procedure 6.1 Test portion Weigh 0.5 g of dry test sample (5), accurate to 0.0001 g. 6.2 Number of determinations It shall make two determinations independently on the same test sample; shall take the average value. 6.3 Blank test Do a blank test along with the test po
Ys T 273 4 2020 Translated English Of Chinese Standard Ys T 273 4 2020 Yst273 4 2020
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Ys T 273 4 2020 Translated English Of Chinese Standard Ys T 273 4 2020 Yst273 4 2020 written by https://www.chinesestandard.net and has been published by https://www.chinesestandard.net this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-10-15 with Technology & Engineering categories.
This Part specifies the method for determination of aluminum content in cryolite. This section applies to the determination of aluminum content in cryolite. Measurement range: 9.00% ~ 20.00%. 2 Method summary The sample is melted with acidic potassium sulfate or potassium pyrosulfate, to remove fluorine; the frit is dissolved with hydrochloric acid. Take a portion of the test solution. Add excess Na2EDTA, to form a complex between the aluminum element and EDTA. Under weakly acidic conditions, use xylenol orange as an indicator. Use zinc nitrate standard titration solution, to titrate the excess Na2EDTA. Add sodium fluoride. Heat to displace EDTA. Then use zinc nitrate standard solution, to titrate the released EDTA. Calculate the aluminum content by using the millimeters of zinc nitrate standard titration solution, which is consumed in the titration. 3 Reagents Unless otherwise stated, only reagents and deionized water determined to be of analytical grade are used in the analysis. 3.1 Acid potassium sulfate or potassium pyrosulfate. 3.2 Sodium fluoride. 3.3 Hydrochloric acid (1 + 1). 3.4 Hydrochloric acid (1 + 3). 3.5 Sodium hydroxide solution (100 g/L). 3.6 Buffer solution (pH value 5.6): Weigh 333 g sodium acetate trihydrate. Dissolve in water. Add 15 mL of glacial acetic acid. Use water to dilute it to 1000 mL. Mix well. YS/T 273.4-2020 www.ChineseStandard.net ? Buy True-PDF ? Auto-delivery. Page 6 of 9 3.7 Na2EDTA solution (0.05 mol/L): Weigh 9.3 g of disodium ethylenediaminetetraacetate (Na2EDTA) into a 250 mL beaker. Add 100 mL of water. Heat to dissolve. Cool slightly. Use water to dilute to 500 mL. Mix well. 3.8 Zinc nitrate standard titration solution (approximately 0.01853 mol/L): - Pretreatment: Place about 10 g of zinc particles (wZn ¡Ý 99.99%) in a 250 mL beaker. Add about 100 mL of water. Add a small amount of nitric acid (1 + 1). Stir to dissolve the oxides on the surface of the zinc particles. When the zinc particle is bright silvery white. pour off ...
Ys T 820 24 2012 Translated English Of Chinese Standard Ys T 820 24 2012 Yst820 24 2012
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Ys T 820 24 2012 Translated English Of Chinese Standard Ys T 820 24 2012 Yst820 24 2012 written by https://www.chinesestandard.net and has been published by https://www.chinesestandard.net this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-08-30 with Technology & Engineering categories.
This part of YS/T 820 specifies the method for the determination of hygroscopic moisture content in the analysis of laterite nickel ores. This part applies to the determination of the hygroscopic moisture content in the analysis of laterite nickel ores, the determination range is 0.10%~7.00%. 2 Method summary The sample is dried at 105 ¡ãC~110 ¡ãC, and the hygroscopic moisture content is calculated by the decrement method. 3 Apparatus 3.1 Weighing bottle: The diameter is not less than 5 cm, and it is equipped with a tight ground cap. 3.2 Drying oven: It can keep the temperature at 105 ¡æ¡À5 ¡æ. 4 Samples The particle size of the sample shall be less than 160 ¦Ìm, and the sample shall have been balanced in the air. 5 Analysis steps 5.1 Samples Pre-dry the weighing bottle (3.1) in a drying oven (3.2) at 105 ¡ãC. After drying for 1 hour, take it out, cool it in a desiccator for 20-30 minutes, and weigh it. Weigh 1.0 g of the air-balanced sample into the weighing bottle, accurate to 0.0002 g, and spread it evenly in the weighing bottle. YS/T 820.24-2012 www.ChineseStandard.net ? Buy True-PDF ? Auto-delivery Page 7 of 8 5.2 Measurement times Two determinations shall be carried out independently, and the average value is taken as the result. 5.3 Determination Place the open weighing bottle containing the