YS/T 575.1-2007 PDF EnglishUS$90.00 · In stock · Download in 9 seconds
YS/T 575.1-2007: Methods for chemical analysis of bauxite - Part 1: Determination of aluminium oxide content - EDTA titrimetric method Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid YS/T 575.1: Historical versions
Similar standardsYS/T 575.1-2007: Methods for chemical analysis of bauxite - Part 1: Determination of aluminium oxide content - EDTA titrimetric 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/YST575.1-2007 NON-FERROUS METAL INDUSTRY STANDARD ICS 71.100.10 Q 52 Replacing YS/T 575.1-2006 Methods for chemical analysis of bauxite - Part 1. Determination of aluminium oxide content - EDTA titrimetric method Issued on. NOVEMBER 14, 2007 Implemented on. MAY 01, 2008 Issued by. National Development and Reform Commission Table of ContentsForeword... 3 1 Scope... 6 2 Method summary... 6 3 Reagents... 6 4 Specimen... 8 5 Analysis steps... 8 6 Expression of analysis results... 9 7 Precision... 10 8 Quality assurance and control... 10ForewordYS/T 575-2007 “Methods for chemical analysis of bauxite” is a modification to YS/T 575-2006 (formerly GB/T 3257-1999). It has 24 parts in total. - Part 1.Determination of aluminum oxide content - EDTA titrimetric method; - Part 2.Determination of silicon dioxide content - Gravimetric-molybdenum blue photometric method; - Part 3.Determination of silicon dioxide content - Molybdenum blue photometric method; - Part 4.Determination of iron oxide content - Potassium titrimetric method; - Part 5.Determination of iron oxide content - Orthophenanthroline photometric method; - Part 6.Determination of titanium dioxide content - Diantipyrylmethane photometric method; - Part 7.Determination of calcium oxide content - Flame atomic absorption spectrophotometric method; - Part 8.Determination of magnesium oxide content - Flame atomic absorption spectrophotometric method; - Part 9.Determination of potassium oxide, sodium oxide content - Flame atomic absorption spectrophotometric method; - Part 10.Determination of manganese oxide content - Flame atomic absorption spectrophotometric method; - Part 11.Determination of chromium oxide content - Flame atomic absorption spectrophotometric method; - Part 12.Determination of vanadium pentoxide content - N-benzoyl-N- phenylhydroxylamine photometric method; - Part 13.Determination of zinc content - Flame atomic absorption spectrophotometric method; - Part 14.Determination the total content of rare earth oxide Tribromo- arsenazo photometric method; - Part 15.Determination of gallium oxide content - Rhodamine B-extraction photometric method; - Part 16.Determination of phosphorus pentoxide content - Molybdenum blue spectrophotometric method; - Part 17.Determination of sulfur content - Direct combustion-iodometric method; - Part 18.Determination of total carbon content - Non-aqueous titrimetric method after combustion; - Part 19.Determination of the loss on ignition - Gravimetric method; - Part 20.Preparation of pre-dried sample; - Part 21.Determination of organic carbon content titrimetric method; - Part 22.Determination of hydroscopic moisture in analytical samples - Gravimetric method; - Part 23.Determination of element contents X-ray fluorescence spectrometric method; - Part 24.Determination of carbon content and sulfur content - Infrared absorption method. This Part is Part 1. This Part replaces YS/T 575.1-2006 (formerly GB/T 3257.1-1999). This Part is a modification to YS/T 575.1-2006.Compared with YS/T 575.1- 2006, the main changes in this Part are as follows. - modified lead acetate standard solution in YS/T 575.1-2006 to zinc standard solution, potassium fluoride solution to sodium fluoride; - deleted the definition of “titer”; - unified the drying temperature of the specimen as 110°C±5°C; - added precision. This Part was proposed by and shall be under the jurisdiction of National Technical Committee on Non-ferrous Metals of Standardization Administration of China. Main drafting organization of this Part. China Aluminum Corporation Zhengzhou Research Institute. The drafting organization of this Part. China Aluminum Corporation Shanxi Branch. Main drafters of this Part. Huang Anping, Yuan Xiaoke, He Xiaodong, He Ruihong. This Part shall be interpreted by National Technical Committee on Non-ferrous Metals of Standardization Administration of China. Version of standard substituted by this Part is. - YS/T 575.1-2006 (formerly GB/T 3257.1-1999). Methods for chemical analysis of bauxite - Part 1. Determination of aluminium oxide content - EDTA titrimetric method1 ScopeThis Part specifies the determination method of aluminium oxide content in bauxite. This Part is applicable to the determination of aluminium oxide content in bauxite. The determination range is 40%~80%.2 Method summaryThe specimen is melted and decomposed by sodium carbonate-boric acid or sodium hydroxide, is extracted by hot water and is acidized by hydrochloric acid. Use lactic acid masked titanium or in the presence of EDTA, use sodium hydroxide to separate and remove impurity elements such as iron and titanium. Then in the weakly acidic solution, make aluminum complex with excessive EDTA.3 Reagents3.1 Anhydrous sodium carbonate. 3.2 Boric acid. 3.3 Sodium hydroxide. 3.4 Sodium fluoride. 3.5 Hydrochloric acid (ρ1.19g/mL). 3.6 Hydrochloric acid (1+1). 3.7 Hydrochloric acid (2+98). 3.8 Sodium hydroxide solution (400g/L). 3.9 Sodium hydroxide (100g/L). 3.18 Aluminum standard solution 3.18.1 Place metal aluminum shavings (99.99%) in a 100mL beaker. Add 25mL of water and 25mL of hydrochloric acid (3.6). Heat to boil 5min~10min. Then remove. After pouring the solution, use water to completely clean. Then use absolute ethanol to wash 3 times. Place on a watch glass that is padded with filter paper. Put into a 110°C±5°C drying oven to dry 5min. Take it out and place in a dryer to cool. 3.19 Zinc standard solution (0.0200mol/L) Weigh 1.3076g of high-purity zinc in a 300mL beaker. Add 50mL of water. Cover the watch glass. Along with the beaker wall, add 15mL of nitric acid (1+1). Slightly heat till it is completely dissolved and evaporated to 10mL~15mL. Cool to room temperature. Use water to wash the watch glass and beaker wall. Move into a 1000mL volumetric flask. Dilute to the scale and shake well.4 SpecimenUse a mortar to grind the specimen. Through a 74μm sieve, place the well- ground specimen at 110°C±5°C to dry 2h. Place in a dryer. Cool to room temperature for use.5 Analysis steps5.1 Test portion Weigh 0.25g of specimen (4), to the nearest of 0.0001g. 5.2 Determination times It shall conduct two determinations independently to a same specimen. Take the average value. 5.3 Determination 5.3.1 Test portion decomposition by any of the following methods 5.3.3 Titration Add 20mL of acetic acid-sodium acetate buffer (3.14) to the solution that is separated after 5.3.2.1 or 5.3.2.2.Heat and boil 2min~3min. Remove it. Cool it under tap water to room temperature. Add 2 drops of xylenol orange indicator solution (3.17).6 Expression of analysis resultsCalculate the mass fraction (%) of aluminum oxide according to the formula as below.7 Precision7.1 Repeatability Measured values of two independent test results are obtained under repeatable conditions. 7.2 Tolerance The difference between laboratory analysis results shall not be greater than the tolerances listed in Table 1.8 Quality assurance and controlIn analysis, use standard sample or control sample to verify. Or, at least use standard sample or control sample to verify the analysis method once a year. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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