ASTM D3869-2004 Standard Test Methods for Iodide and Bromide Ions in Brackish Water Seawater and Brines《微咸水、海水和盐水中碘化物和溴化物离子的标准试验方法》.pdf
《ASTM D3869-2004 Standard Test Methods for Iodide and Bromide Ions in Brackish Water Seawater and Brines《微咸水、海水和盐水中碘化物和溴化物离子的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D3869-2004 Standard Test Methods for Iodide and Bromide Ions in Brackish Water Seawater and Brines《微咸水、海水和盐水中碘化物和溴化物离子的标准试验方法》.pdf(12页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D 3869 04Standard Test Methods forIodide and Bromide Ions in Brackish Water, Seawater, andBrines1This standard is issued under the fixed designation D 3869; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of l
2、ast revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 These test methods2cover the determination of solubleiodide and bromide ions, or both, in brackish water, seawater,an
3、d brines. Four test methods are given as follows:1.1.1 Test Method A for both Iodide and Bromide IonsVolumetric, for concentrations from 0.2 to 2000 mg/L iodideand from 5 to 6500 mg/L bromide (Sections 7-15).1.1.2 Test Method B for Iodide IonColorimetric, forconcentrations from 0.2 to 2000 mg/L iodi
4、de (Sections 16-25).1.1.3 Test Method C for Iodide IonSelective electrode, forconcentrations from 1 to 2000 mg/L iodide (Sections 26-34).1.1.4 Test Method D for Bromide IonColorimetric, forconcentrations from 40 to 6500 mg/L bromide (Sections35-44).1.2 Test MethodAis intended for use on all brackish
5、 waters,seawaters, and brines that contain appreciable amounts ofiodide or bromide ions or both. Test Methods B, C, and D,because of their rapidity and sensitivity, are recommended forthe analysis of brackish waters, seawaters, and brines in thefield and in the laboratory.1.3 Samples containing from
6、 0.2 to 2000 mg/L of iodide or5 to 6500 mg/L of bromide may be analyzed by these methods.1.4 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 practice
7、s and determine the applica-bility of regulatory limitations prior to use. For specificprecautionary statements, see 20.2 and 39.2.2. Referenced Documents2.1 ASTM Standards:3D 1129 Terminology Relating to WaterD 1193 Specification for Reagent WaterD 2777 Practice for Determination of Precision and B
8、ias ofApplicable Methods of Committee D19 on WaterD 3370 Practices for Sampling Water from Closed ConduitsD 5810 Guide for Spiking Into Aqueous SamplesD 5847 Practice for Writing Quality Control Specificationsfor Standard Test Methods for Water AnalysisE60Practice for Analysis of Metals, Ores, and R
9、elatedMaterials by Molecular Absorption SpectrometryE 200 Practice for Preparation, Standardization, and Storageof Standard and Reagent Solutions for Chemical AnalysisE 275 Practice for Describing and Measuring Performanceof Ultraviolet, Visible, and Near Infrared Spectrophotom-eters3. Terminology3.
10、1 DefinitionsFor definitions of terms used in these testmethods, refer to Terminology D 1129.4. Significance and Use4.1 Identification of a brackish water, seawater, or brine isdetermined by comparison of the concentrations of theirdissolved constituents. The results are used to evaluate theorigin o
11、f the water, determine if it is a possible pollutant ordetermine if it is a commercial source of a valuable constituentsuch as iodine or bromine.1These test methods are under the jurisdiction of ASTM Committee D19 onWater and are the direct responsibility of Subcommittee D19.05 on InorganicConstitue
12、nts in Water.Current edition approved March 1, 2004. Published April 2004. Originallyapproved in 1979. Last previous edition approved in 1999 as D 3869 95 (1999).2Additional information is contained in the following references:Collins, A. G., Geochemistry of Oilfield Waters, Elsevier, New York, N. Y
13、., 1975,496 pp.American Petroleum Institute, API Recommended Practice for Analysis ofOilfield Waters, Subcommittee on Analysis of Oilfield Waters, API RP, 45 2nd ed,1968, 49 pp.Hoke, S. H, Fletcher, G. E., and Collins, A. G., “Fluoride and Iodide SelectiveElectrodesApplied to Oilfield BrineAnalysis.
14、” US Department of Energy, Report ofInvestigations, BETC/RI-78/7, 1978.3For referenced 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 AST
15、M website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5. Reagents5.1 Purity of ReagentsReagent grade chemicals shall beused in all tests. Unless otherwise indicate
16、d, it is intended thatall reagents shall conform to the specification of the Committeeon Analytical Reagents of the American Chemical Society,4where such specifications are available. Other grades may beused, provided it is first ascertained that the reagent is ofsufficiently high purity to permit i
17、ts use without lessening theaccuracy of the determination.5.2 Purity of Water Unless otherwise indicated, referenceto water shall be understood to mean reagent water conformingto Specification D 1193, Type I. Other reagent water types maybe used provided it is first ascertained that the water is ofs
18、ufficiently high purity to permit its use without adverselyaffecting the precision and bias of the test method. Type IIIwater was specified at the time of round robin testing of thistest method.6. Sampling6.1 Collect the sample in accordance with Practices D 3370.TEST METHOD AVOLUMETRIC FOR IODIDEAN
19、D BROMIDE7. Scope7.1 This test method is applicable to brackish waters,seawaters, and brines, and is recommended for such waterscontaining appreciable amounts of iodide or bromide, or both.The test method can be used for concentrations as high as 2000mg/L iodide and 6500 mg/L bromide.8. Summary of T
20、est Method8.1 Iodide in the sample is oxidized with bromine to iodatein a buffered solution, the excess bromine is decomposed withsodium formate, and the iodate reacts with added iodide toform iodine which is titrated with sodium thiosulfate.8.2 Iodide and bromide are oxidized to iodate and bromate,
21、respectively, with hypochlorite. The excess hypochlorite isdestroyed with sodium formate, leaving iodate and bromate toreact with added iodide to liberate iodine which is titrated withsodium thiosulfate.8.3 The bromide concentration is calculated by differencebetween the iodide and combined iodide a
22、nd bromide deter-minations.9. Interferences9.1 Iron, manganese, and organic matter can interfere (Note1).They are removed by precipitation and filtration. Remainingtraces of iron are masked with fluoride.NOTE 1Brines containing surfactants can cause emulsion problems,in which case a suitable emulsio
23、n breaker can be used.10. Apparatus10.1 Mechanical Bottle Shaker.10.2 Bottles, 200-mL, for use on mechanical shaker.10.3 Pipets.10.4 Hot-Water Bath, thermostatically controlled to 6 1C.10.5 Erlenmeyer Flasks, 250-mL.11. Reagents11.1 Acetic Acid, glacial.11.2 Ammonium Molybdate SolutionDissolve2gofam
24、-monium molybdate in water and dilute to 100 mL.11.3 Bromine Water (Saturated)Add to 250 mL of waterslightly more liquid bromine (8 to 10 mL) than will dissolve onshaking. Store in a glass-stoppered amber bottle.11.4 Calcium Carbonate (CaCO3), powdered.11.5 Calcium Oxide (CaO), anhydrous powdered.11
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