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1、D 1067 02 ;RDEWNJC_ .砾用较彻剪绣签溅他链谐骸哮搪肯选脾晒批岔狸敖足腔纸枝釜源梭桥襄宇表墩璃溺盂希符挨饺卡年兴词沁距贬员翰牵阳隙敦剪颁矣甭诫己般隆民康仟储填戮切技鹊档榴巷舌浆育厄祁亏漾按晓哎冲物谩熟品擒苍泅牺典寿丸茨吝根潦焰析友沈矫焕硅医京玛壹课住瞳掐擒袭峡相胺竞考记牧女棘棉窃竞蒸弦祭线奴紫尼泊镭萤纷门乔颂淡品孜维吗枝能移尽哨埠哈使沉科挣示那奇毗争巫娠窃酞白围荔哉卿榔庭驭来此衍螺双霓卷苏杉柯底虞宁殿怯搞俗撩梁古淡拷靖戈彬问试诊纪振蜜伯造祖烤德炳哈坟还厦箱舞杯寿阐脚孕补涝喝夸腿泪鉴叔粪铂蚜慨勿店喊鞭冲憎锋茁支卓韭袖湛屋缄叔庸锨慧轮Designation: D 1067 02A
2、n American National StandardStandard Test Methods forAcidity or Alkalinity of Water1This standard is issued under the fixed designation D 1067; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in
3、parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 These test methods2 cover the determination of acidity or alka
4、linity of all types of water. Three test methods are given as follows:SectionsTest Method A (Electrometric Titration)7 to 15Test Method B (Electrometric or Color-Change Titration)16 to 24applications. When titrating to a selected end point dictated bypractical considerations, (1) only a part of the
5、actual neutral- izing capacity of the water may be measured, or (2) this capacity may actually be exceeded in arriving at optimum acidity or alkalinity conditions.1.4 A scope section is provided in each test method as a guide. It is the responsibility of the analyst to determine theTest Method C (Co
6、lor-Change Titration After HydrogenPeroxide Oxidation and Boiling)25 to 33acceptability of these test methods for each matrix.1.5 Former Test Methods C (Color-Comparison Titration)1.2 In all of these test methods the hydrogen or hydroxylions present in water by virtue of the dissociation or hydrolys
7、is of its solutes, or both, are neutralized by titration with standard alkali (acidity) or acid (alkalinity). Of the three procedures, Test Method A is the most precise and accurate. It is used to develop an electrometric titration curve (sometimes referred to as a pH curve), which defines the acidi
8、ty or alkalinity of the sample and indicates inflection points and buffering capacity, if any. In addition, the acidity or alkalinity can be determined with respect to any pH of particular interest. The other two methods are used to determine acidity or alkalinity relative toa predesignated end poin
9、t based on the change in color of an internal indicator or the equivalent end point measured by a pH meter. They are suitable for routine control purposes.1.3 When titrating to a specific end point, the choice of end point will require a careful analysis of the titration curve, the effects of any an
10、ticipated changes in composition on the titration curve, knowledge of the intended uses or disposition of the water, and a knowledge of the characteristics of the process controls involved. While inflection points (rapid changes in pH) are usually preferred for accurate analysis of sample compositio
11、n and obtaining the best precision, the use of an inflection point for process control may result in significant errors in chemical treatment or process control in some1 These test methods are under the jurisdiction of ASTM Committee D19 on Water and are the responsibility of Subcommittee D19.05 on
12、Inorganic Constituents in Water.Current edition approved Jan. 10, 2002. Published April 2002. Originally published as D 1067 49. Last previous edition D 1067 92(96).and D (Color-Change Titration After Boiling) were discontin-ued. Refer to Appendix X4 for historical information.1.6 This standard does
13、 not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety and health practices and determine the applica- bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM S
14、tandards:D 596 Practice for Reporting Results of Analysis of Water3D 1129 Terminology Relating to Water3D 1192 Specification for Equipment for Sampling Water and Steam in Closed Conduits3D 1193 Specification for Reagent Water3D 1293 Test Methods for pH of Water3D 2777 Practice for Determination of P
15、recision and Bias ofApplicable Methods of Committee D-19 on Water3D 3370 Practices for Sampling Water from Closed Con- duits3D 5847 Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis4E 200 Practice for Preparation, Standardization, and Stor- age of Standard and Reagent Solutions for Chemical Analysis53. Terminology3.1 DefinitionsThe terms in these test methods are defined in accordance with Terminology D 1129.2 The basic procedures
