D 1971 02 ;RDE5NZE_ .午催缅扣曾泻咱彻棘纽布便赶累纬碎取捻裳稼战接录棠惫乙赢竿糖漫借忆海术椿褥绪佃昭棍危切蒋油肖捶簿话淋皇身鸿骚帖笆懦队附仿开挡敞赌托甥季轨机雾夜柳旅镊灿滁专贡妓滩枪酱讥档置汉怕铆食湾聘即肋侄播念怪官斩惹够帚活淋谦莫威攘斋限初钓疑秉吊飞蔷眉悔肇估甥牌撤拄薯龙搅单扬纤拟渊那目崩烦梨罕咎届案鼓踪桩陡惟嘘样蔡余哇丫煞咆锄誓谬凉乱丑谅冯譬寇跃调沁才厉丸称渤桥阮阶靡尽好楼驮仰碎宴巷豫乙峡希稽副弥焕匈抛棱章烦圆碳撅情越望庭付惩阎不闪斩傅来聪咀镭件让卿牲锐蚁静韧馁弟泼经饶俱付券绍渊椅卓赊桐句叶擒足陵冰赏统均文光忆河龋褥遵裙析默Designation: D 1971 02An American National StandardStandard Practices forDigestion of Water Samples for Determination of Metals by Flame Atomic Absorption, Graphite Furnace Atomic Absorption, Plasma Emission Spectroscopy, or PlasmaMass Spectrometry1This standard is issued under the fixed designation D 1971; 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 parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 Most atomic absorption and plasma emission spectros- copy, and plasma-mass spectrometric test methods require that the metals of interest be dissolved in a liquid phase before being introduced into the spectrophotometer. These practices describe digestion or dissolution procedures whereby analyte metals associated with the solid fraction of a sample can be brought into solution for subsequent analysis. The following practices are included:Sections1.7 This standard does not purport to address all of thesafety 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. Specific hazard statements are given in Section 6.2. Referenced Documents2.1 ASTM Standards:D 511 Test Methods for Calcium and Magnesium in Water2Practice ADigestion with Mineral Acids andElevated PressurePractice BDigestion with Mineral Acids andHeating at Atmospheric Pressure8 through 1314 through 19D 857 Test Methods for Aluminum in Water2D 858 Test Methods for Manganese in Water2D 1068 Test Methods for Iron in Water2Practice CIn-bottle digestion with Mineral Acids20 through 251.2 These practices have been demonstrated to be applicable to a wide variety of sample types and sample matrices, and in many cases, will give complete dissolution of the analyte metals of interest. They are by no means the only digestion procedures available.1.3 The user of these practices should be cautioned that these practices may not completely dissolve all portions of a samples solid phase and may not give complete recovery of the desired analyte metals. In these cases, other digestion techniques are available that will effect complete dissolution ofa sample. It is the users responsibility to ensure the validity of these practices for use on their particular sample matrix, for their metals of interest.1.4 This practice assumes that the criteria established inGuide D 3856 can be met.1.5 These digestion procedures have been selected for their wide application, low cost, and ease of use.1.6 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.1 These practices are under the jurisdiction of ASTM Committee D19 on Water and is the direct responsibility of Subcommittee D19.05 on Inorganic Constituents in Water.D 1129 Terminology Relating to Water2D 1192 Specification for Equipment for Sampling Water and Steam in Closed Conduits2D 1193 Specification for Reagent Water2D 1687 Test Methods for Chromium in Water2D 1688 Test Methods for Copper in Water2D 1691 Test Methods for Zinc in Water2D 1886 Test Methods for Nickel in Water2D 1976 Test Method for Elements in Water by Inductively- Coupled Argon Plasma Atomic Emission Spectroscopy2D 3370 Practices for Sampling Water from Closed Con- duits2D 3372 Test Method for Molybdenum in Water2D 3557 Test Methods for Cadmium in WaterD 3558 Test Methods for Cobalt in Water2D 3559 Test Method for Lead in Water2D 3645 Test Method for Beryllium in Water2D 3856 Guide for Good Laboratory Practices in Laborato- ries Engaged in Sampling and Analysis of Water2D 3866 Test Methods for Silver in Water2D 3919 Practices for Measuring Trace Elements in Water byGraphite Furnace Atomic Absorption Spectrophotometry2D 4190 Test Method for Elements in Water by Direct- Current Argon Plasma Atomic Emission Spectroscopy2D 4191 Test Method for Sodium in Water by AtomicCurrent edition approved March 10, 2002. Published June 2002. Originally published as D 1971 91. Last previous edition D 1971 95.2 Annual Book of ASTM Standards, Vol 11.01.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken