各种金属的化学分析用沉淀物样品的总煮解度的试验规程

详细信息   

• 中文主题词：沉淀物 ; 化学分析和试验 ; 金属 ; 煮解度
• 标准号：ASTM D4698-1992(2007)
• 发布日期：1992
• 英文题名：Standard Practice for Total Digestion of Sediment Samples for Chemical Analysis of Various Metals
• 英文主题词：chemical analysis ; metal ; sediment samples ; total ; total digestion
• 标准状态：现行
• 发布单位：US-ASTM
• 国际标准分类号：13.060.50 (Examination of water for chemical substances)
• 载体形态：5P.;A4
• 中国标准分类号：Z23
• 国别：美国材料与试验协会

文摘

The chemical analysis of sediments, collected from such locations as streams, rivers, lakes, and oceans can provide information of environmental significance.

These practices can be used with either suspended sediment (material actively transported by water) or bed sediment (material temporarily at rest on the bed of a water body).

Standardized practices for digesting sediments, for subsequent chemical analysis, will facilitate inter- and intra-areal comparisons as well as comparison of data generated by different groups. The use of total digestions also eliminates the ambiguities and interpretational difficulties associated with partial digestions and the operational definitions that accompany them.

PROCEDURE Ax2014;FUSION

1.1 This practice covers two procedures for the total digestion of sediments for subsequent determination of metals by such techniques as flame atomic absorption spectrophotometry, graphite-furnace atomic absorption spectrophotometry, atomic emission spectroscopy, etc.

1.2 This practice is applicable in the subsequent determination of volatile, semivolatile, and nonvolatile metals of sediments.

1.3 Actual metal quantitation can be accomplished by following the various test methods outlined under other appropriate ASTM standards for the metal(s) of interest. Before selecting either of the digestion techniques outlined in this practice, the user should consult the appropriate quantitation standard(s) for any special analytical considerations, and Practice D 3976 for any special preparatory considerations.

This standard does 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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For a specific hazard statement, see Note 7.

1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.