GB/T 6901.3-2004 PDF EnglishUS$70.00 · In stock · Download in 9 seconds
GB/T 6901.3-2004: Chemical analysis of silica refractories -- Part 3: Determination of silicon dioxide -- Hydrofluoric acid gravimetric method Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Obsolete GB/T 6901.3: Historical versions
GB/T 6901.3-2004: Chemical analysis of silica refractories -- Part 3: Determination of silicon dioxide -- Hydrofluoric acid gravimetric method---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT6901.3-2004 GB ICS 81.080 Q 40 NATIONAL STANDARD Replacing GB/T 6901.3-1986 Chemical analysis of silica refractories - Part 3. Determination of silicon dioxide - Hydrofluoric acid gravimetric method Issued on: NOVEMBER 27, 2013 Implemented on: AUGUST 01, 2014 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China; Standardization Administration of the People’s Republic of China Table of ContentsForeword... 3 1 Scope... 5 2 Normative references... 5 3 Principle... 5 4 Reagents... 5 5 Instruments... 6 6 Sampling... 6 7 Analytical steps... 6 8 Calculation of analytical results... 7 9 Permissible difference... 8 10 Quality assurance and control... 8 11 Test report... 8ForewordGB/T 6901 is divided into 11 parts. - Part 1.Chemical analysis of silica refractories - Part 1.Determination of loss on ignition - Gravimetric method; - Part 2.Chemical analysis of silica refractories - Part 2.Determination of silicon dioxide - Gravimetric-molybdenum blue photometric method; - Part 3.Chemical analysis of silica refractories - Part 3.Determination of silicon dioxide - Hydrofluoric acid gravimetric method; - Part 4.Chemical analysis of silica refractories - Part 4.Determination of iron oxide - O-phenanthroline photometric method; - Part 5.Chemical analysis of silica refractories - Part 5.Determination of aluminium oxide - Chromazurol S photometric method; - Part 6.Chemical analysis of silica refractories - Part 6.Determination of aluminium oxide - EDTA volumetric method; - Part 7.Chemical analysis of silica refractories - Part 7.Determination of titanium dioxide - Diantipyrylmethane photometric method; - Part 8.Chemical analysis of silica refractories - Part 8.Determination of calcium oxide and magnesium oxide - Atomic absorption spectrophotometric method; - Part 9.Chemical analysis of silica refractories - Part 9.Determination of potassium oxide and sodium oxide - Atomic absorption spectrophotometric method; - Part 10.Chemical analysis of silica refractories - Part 10.Determination of manganese oxide - Atomic absorption spectrophotometric method; - Part 11.Chemical analysis of silica refractories - Part 11.Determination of phosphorus pentoxide - Molybdenum blue photometric method. This part is part 3 of GB/T 6901. This part replaces GB/T 6901.3-1986. Compared with GB/T 6901.3-1986, the major changes of this part are as follows. - ADD the preface, normative references, quality assurance and control, test reports of each chapter; - SPECIFIY the sample preparation in detail. IMPROVED the operability; - ADD provision of rounding digits of analysis value. And it allows the use of other provisions; - According to GB/T 1.1-2000 and GB/T 20001.4-2001, ADJUST the structure and format of this part. This part was proposed by China Iron and Steel Association. This part shall be administered by National Refractories Standardization Technical Committee refractories (SAC/TC 193). Drafting organizations of this part. Luoyang Institute of Refractories Research, Shanxi Xixiaoping Refractories Co., Ltd., and Chongqing Special Steel Co. The main drafters of this part. Liang Xianlei, Guo Qiuhong, Zhang Huirong, Deng Xiangqing, and Tang Shubeng. The previous version replaced by this part is. - GB/T 6901.3-1986. Chemical analysis of silica refractories - Part 3. Determination of silicon dioxide - Hydrofluoric acid gravimetric method1 ScopeThis part specifies the hydrofluoric acid gravimetric method to determine silicon dioxide. This part applies to the determination of silicon dioxide in silica refractories. Measuring range (mass fraction) is greater than 95.00%.2 Normative referencesGB/T 6901.1-2004 Chemical analysis of silica refractories - Part 1.Determination of loss on ignition - Gravimetric method GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values GB/T 10325 Shaped refractory products - Rule of acceptance, sampling and inspection GB/T 17617 Refractory products - Sampling of raw materials and unshaped products3 PrincipleAfter the sample is burned to the constant, USE hydrofluoric acid and nitric acid to dissolve. EVAPORATE it to remove the silicon. Then USE nitrate to remove fluoride. BURN at 1000 °C - 1100 °C to constant weight. The difference between the 2 weighings is the amount of silicon dioxide.4 Reagents4.1 Nitrate (ρ1, 42 g/mL). 4.2 Hydrofluoric acid (40%). - Test date. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 6901.3-2004 be delivered?Answer: The full copy PDF of English version of GB/T 6901.3-2004 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 6901.3-2004_English with my colleagues?Answer: Yes. 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