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ASTM D 3919 Document Information:
Title
Standard Practice for Measuring Trace Elements in Water by Graphite Furnace Atomic Absorption Spectrophotometry
ASTM International
Publication Date:
Mar 1, 2004
Scope:
(Footnote *)
This practice covers the general considerations for the quantitative
determination of trace
elements in water and wastewater by graphite furnace atomic absorption
spectrophotometry. Furnace
atomizers are a most useful means of extending detection limits;
however, the practice should only
be used at concentration levels below the optimum range of direct
flame aspiration atomic
absorption spectrophotometry. Because of differences between various
makes and models of
satisfactory instruments, no detailed operating instructions can be
provided for each instrument.
Instead, the analyst should follow the instructions provided by the
manufacturer of a particular
instrument.
Wavelengths, estimated detection limits, and optimum concentration
ranges are given in the
individual methods. Ranges may be increased or decreased by varying
the volume of sample injected
or the instrumental settings or by the use of a secondary wavelength.
Samples containing
concentrations higher than those given in the optimum range may be
diluted or analyzed by other
techniques.
This technique is generally not applicable to brines and seawater.
Special techniques such as
separation of the trace elements from the salt, careful temperature
control through ramping
techniques, or matrix modification may be useful for these samples.
The analyst is encouraged to consult the literature as provided by the
instrument manufacturer as
well as various trade journals and scientific publications.
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.
Footnote * - A Summary of Changes section appears at the end of this
standard.
Keywords:
- elements
- graphite furnace atomic absorption
- water
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