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ASTM D 6600 Document Information:
Title
Standard Practice for Evaluating Test Sensitivity for Rubber Test Methods
ASTM International
Publication Date:
Nov 10, 2000
Scope:
This practice covers testing to evaluate chemical constituents,
chemical and physical properties of
compounding materials, and compounded and cured rubbers, which may
frequently be conducted by one
or more test methods. When more than one test method is available, two
questions arise: Which test
method has the better (or best) response to or discrimination for the
underlying fundamental
property being evaluated? and Which test method has the least error?
These two characteristics
collectively determine one type of technical merit of test methods
that may be designated as test
sensitivity.
Although a comprehensive and detailed treatment, as given by this
practice, is required for a full
appreciation of test sensitivity, a simplified conceptual definition
may be given here. Test
sensitivity is the ratio of discrimination power for the fundamental
property evaluated to the
measurement error or uncertainty, expressed as a standard deviation.
The greater the discriminating
power and the lower the test error, the better is the test
sensitivity. Borrowing from the
terminology in electronics, this ratio has frequently been called the
signal-to-noise ratio; the
signal corresponding to the discrimination power and the noise
corresponding to the test
measurement error. Therefore, this practice describes how test
sensitivity, generically defined as
the signal-to-noise ratio, may be evaluated for test methods used in
the rubber manufacturing
industry, which measure typical physical and chemical properties, with
exceptions as noted in 1.3.
This practice does not address the topic of sensitivity for threshold
limits or minimum detection
limits (MDL) in such applications as (1) the effect of intentional
variations of compounding
materials on measured compound properties or (2) the evaluation of low
or trace constituent levels.
Minimum detection limits are the subject of separate standards.
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.
The content of this practice is as follows:
Keywords:
-
absolute test sensitivity
-
calibration material
-
reference material
-
relative test sensitivity
-
signal-to-noise ratio
-
test sensitivity
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