ASTM E841-2012 3194 Standard Test Method for Determination of Copper in Iron Ores and Related Materials by Atomic Absorption Spectrometry 《原子吸收光谱法测定铁矿及相关材料中铜含量的标准试验方法》.pdf
《ASTM E841-2012 3194 Standard Test Method for Determination of Copper in Iron Ores and Related Materials by Atomic Absorption Spectrometry 《原子吸收光谱法测定铁矿及相关材料中铜含量的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM E841-2012 3194 Standard Test Method for Determination of Copper in Iron Ores and Related Materials by Atomic Absorption Spectrometry 《原子吸收光谱法测定铁矿及相关材料中铜含量的标准试验方法》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: E841 12Standard Test Method forDetermination of Copper in Iron Ores and Related Materialsby Atomic Absorption Spectrometry1This standard is issued under the fixed designation E841; the number immediately following the designation indicates the year oforiginal adoption or, in the case of
2、 revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the determination of copper iniron ores, concentrates, agglomerates, an
3、d related materials inthe concentration range from 0.003 % to 1 %.NOTE 1As used in this test method (except as related to the term“relative standard deviation”, “%” refers to a mass fraction (wt / wt %)(g/100g).1.2 The values stated in SI units are to be regarded asstandard. No other units of measur
4、ement are included in thisstandard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limit
5、ations prior to use.2. Referenced Documents2.1 ASTM Standards:2D1193 Specification for Reagent WaterE50 Practices for Apparatus, Reagents, and Safety Consid-erations for Chemical Analysis of Metals, Ores, andRelated MaterialsE135 Terminology Relating to Analytical Chemistry forMetals, Ores, and Rela
6、ted MaterialsE173 Practice for Conducting Interlaboratory Studies ofMethods for Chemical Analysis of Metals3E276 Test Method for Particle Size or Screen Analysis atNo. 4 (4.75-mm) Sieve and Finer for Metal-Bearing Oresand Related MaterialsE663 Practice for Flame Atomic Absorption Analysis3E877 Pract
7、ice for Sampling and Sample Preparation of IronOres and Related Materials for Determination of ChemicalCompositionE882 Guide for Accountability and Quality Control in theChemical Analysis LaboratoryE1601 Practice for Conducting an Interlaboratory Study toEvaluate the Performance of an Analytical Met
8、hodE1763 Guide for Interpretation and Use of Results fromInterlaboratory Testing of Chemical Analysis Methods3. Terminology3.1 DefinitionsFor definitions of terms used in this testmethod, refer to Terminology E135.4. Summary of Test Method4.1 The sample is dissolved in HCl with the addition of asmal
9、l amount of HNO3and HF acids. After evaporation tofumes with HClO4, the solution is diluted with water andfiltered. A portion of the solution is examined by atomicabsorption spectrometry using standards containing approxi-mately the same amount of iron as the test sample.5. Significance and Use5.1 I
10、n the making of iron and steel during the reduction ofiron ores, copper forms alloy with iron and steel hence thenecessity of determining the copper content for metallurgicalconsideration.1This test method is under the jurisdiction of ASTM Committee E01 onAnalytical Chemistry for Metals, Ores, and R
11、elated Materials and is the directresponsibility of Subcommittee E01.02 on Ores, Concentrates, and Related Metal-lurgical Materials.Current edition approved Jan. 15, 2012. Published March 2012. Originallyapproved in 1981. Last previous edition approved in 2004 as E841 04. DOI:10.1520/E0841-12.2For r
12、eferenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn. The last approved version of this historical standard i
13、s referencedon www.astm.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.2 This test method is intended to be used for compliancewith compositional specifications for copper content. It isassumed that all who use these procedure
14、s will be trainedanalysts capable of performing common laboratory proceduresskillfully and safely. It is expected that work will be performedin a properly equipped laboratory and that proper wastedisposal procedures will be followed. Appropriate qualitycontrol practices must be followed, such as tho
15、se described inGuide E882.6. Interferences6.1 None of the elements normally found in iron oresinterfere with this test method.7. Apparatus7.1 Atomic Absorption Spectrometer, meeting the followingcriteria:7.1.1 Minimum SensitivityThe absorbance of the highestcalibration solution (see 8.6) must be at
16、least 0.3.7.1.2 CurveLinearityThe difference between the read-ings of the two highest calibration solutions must be more than1.4 times the difference between the readings for the zerosolution and the lowest calibration solution (see 8.6).7.1.3 Minimum StabilityThe relative standard deviationof a num
17、ber of measurements of the highest calibrationsolution and of the zero calibration solution must be less than1.5 % and 0.5 % respectively, relative to the measurement ofthe highest calibration solution.NOTE 2A strip chart recorder or digital readout device, or both isadvisable to measure the criteri
18、a in 7.1 and for all subsequent measure-ments.NOTE 3A background corrector equipped with a hydrogen or adeuterium hollow cathode lamp is advisable for the compositional rangefrom 0.003 % to 0.010 % Cu.NOTE 4Instrument parameters will vary with each instrument. Thefollowing parameters were successful
19、ly used in several laboratories andthey can be used as guidelines. Solutions were aspirated into anair acetylene flame of a premix burner.Hollow cathode lamp, mA 3Wavelength, nm 324.7Air flow-rate, L/min 10Acetylene flow-rate, L/min 2.58. Reagents and Materials8.1 Purity of ReagentsReagent grade che
20、micals shall beused in all tests. Unless otherwise indicated, it is intended thatall reagents conform to the specifications of the Committee onAnalytical Reagents of the American Chemical Society wheresuch specifications are available4. Other grades may be used,provided it is first ascertained that
21、the reagent is of sufficientlyhigh purity to permit its use without lessening the accuracy ofthe determination.8.2 Purity of WaterUnless otherwise indicated, referencesto water shall be understood to mean reagent water conformingto Type I or II of Specification D1193. Type III or IV may beused if th
22、ey effect no measurable change in the blank orsample.8.3 Copper Standard Solution A (1 mL = 1.0 mg Cu)Dissolve 1.000 g of copper metal (minimum 99.5 %) in 30 mLof HNO3(1 + 1) and dilute to 1 L.8.4 Copper Standard Solution B (1 mL = 0.10 mg Cu)Transfer 100 mL of Standard Solution A to a 1-L volumetri
23、cflask, dilute to volume, and mix.8.5 Copper Standard Solution C (1 mL = 0.01 mg Cu)Transfer 100 mL of Standard Solution B to a 1-L volumetricflask, dilute to volume, and mix.8.6 Copper Standard Calibration SolutionDepending onthe expected copper content of the sample, prepare a calibra-tion solutio
24、n using copper Standard Solution B or C. For therange of copper content from 0.01 % to 0.2 %, use copperStandard Solution B and for the range of copper content from0.003 % to 0.02 %, use copper Standard Solution C.8.6.1 Transfer (1.0, 3.0, 5.0, 7.0, and 10.0)-mL portions ofcopper Standard Solution B
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