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Normas ASTM – AENOR
ASTM D3974-81(1999)

ASTM D3974-81(1999)

Standard Practices for Extraction of Trace Elements from Sediments

Fecha:
2017-08-16 /Historical
Superseeded by:
Scope:

1.1 These practices describe the partial extraction of soils, bottom sediments, suspended sediments, and waterborne materials to determine the extractable concentrations of certain trace elements.

1.1.1 Practice A is capable of extracting concentrations of aluminum, boron, barium, cadmium, calcium, chromium, cobalt, copper, iron, lead, magnesium, manganese, molybdenum, nickel, potassium, sodium, strontium, vanadium, and zinc from the preceding materials. Other metals may be determined using this practice. This extraction is the more vigorous and more complicated of the two.

1.1.2 Practice B is capable of extracting concentrations of aluminum, cadmium, chromium, cobalt, copper, iron, lead, manganese, nickel, and zinc from the preceding materials. Other metals may be determined using this practice. This extraction is less vigorous and less complicated than Practice A.

1.2 These practices describe three means of preparing samples prior to digestion:

1.2.1 Freeze-drying.

1.2.2 Air-drying at room temperature.

1.2.3 Accelerated air-drying, for example, 95°C.

1.3 The detection limit and linear concentration range of each procedure for each element is dependent on the atomic absorption spectrophotometric or other technique employed and may be found in the manual accompanying the instrument used. Also see various ASTM test methods for determining specific metals using atomic absorption spectrophotometric techniques.

1.3.1 The sensitivity of the practice can be adjusted by varying the sample size (14.2) or the dilution of the sample (14.6), or both.

1.4 Extractable trace element analysis provides more information than total metal analysis for the detection of pollutants, since absorption, complexation, and precipitation are the methods by which metals from polluted waters are retained in sediments.

1.5 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems 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.

Keywords:
Accelerated aging/testing; Air drying method; Aluminum; Barium content-water; Boron; Cadmium; Calcium; Chromium content-water; Cobalt; Colorimetric analysis-water; Copper content-water; Digestion; Extraction methods; Freeze drying method; Iron; Lead-analysis; Magnesium content-water; Manganese content-water; Metal content-water; Molybdenum content-water; Nickel content-water; Pollution-related trace elements; Potassium content-water; Sediment; Sodium content-water; Soil; Spectrophotometry-atomic absorption (water analysis); Strontium content-water; Trace elements content-water analysis; Vanadium; Waterborne materials-sediment; Zinc; extraction of trace elements from soils/waterborne materials and; suspended/bottom sediments, practice
44,12
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