ASTM D3051-87

Recommended Practice for Carbon Black--Stating the Precision of ASTM Test Methods (Withdrawn 1990)

General Information

• Status: Withdrawn
• ICS: 83.040.30 - Auxiliary materials and additives for plastics
• Technical Committee: D24 - Carbon Black

Standards Content (Sample)

ASTM D3053 87 m 0757530 0028703 5 m
-(-IS-/1
1
Designation: D 3051 - 87
AMERICAN SOCIETY FOR TESTING AND MATERIALS
1916 Race St., Philadelphia, Pa. 19103
Reprinted from the Annual Book of ASTM Standards, Copyright ASTM
If not listed in the current combined index. will appear in lhe next edition
Standard Practice for
CARBON BLACK-STATING THE PRECISION OF ASTM
TEST METHODS‘
This standard is issued under the fixed designation D3051; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A ouniber in parentheses indicates the year of last reapproval.
A superscript epsilon (E) indicates an editorial change since the last revision or reapproval.
1. scope 3. Definitions
1. I This practice offers simplified guidelines 3.1 test result-the final result of one deter-
mination or multiple determinations run simul-
for stating the precision of ASTM test methods
for carbon black as determined in Practice taneously or on the same day by the same tech-
nicians depending upon the directions of the
D 3396.
1.2 The two components of precision utilized procedures.
3.2 test precision-a measure of the ability of
are the repeatability of a test and the reproduci-
bility of a test. a test procedure in obtaining repeated values
1.2.1 The component of repeatability is in- within and among laboratories on essentially
identical samples.
tended to be relevant to within-laboratory prob-
lems concerning statistical process control limits, 3.3 sample-a homogenized portion of car-
quality assurance, and research. The repeatability bon black that usually represents a larger lot of
represents the inherent error of the test method. nominally uniform material.
1.2.2 The component of reproducibility is in- 3.4 standard deviation, s-a measure of the
tended to be relevant to between-laboratory agreement between test results.
problems concerning purchase specifications, 3.5 repeatability standard deviation, sra
quality assurance, and industry standard refer- measure of the agreement between test results
ence blacks. The reproducibility represents the obtained in the same laboratory on different days
inherent test error plus a component of variabil- by the same technician (or the same set of tech-
ity due to different apparatus, reagents, ambient nicians) using the same apparatus and technique
conditions, technique, and so forth, between lab- on the same sample.
oratories. 3.5.1 Discussion-The phrase “or the same
i .3 This standard may involve hazardous ma- set of technicians” refers to cases in which com-
terials, operations, and equipment. This standard mon laboratory practice is to use more than one
does not purport to address all of the safety prob- technician to carry out a test procedure. The
lems associated with its irse. it is the responsibil- “or essentially the same sample” refers to
phrase
ity of the user ofthis standard to establish appro- cases in which the original sample is destroyed
priate safery and health practices and determine by the test procedure.
the applicability of regulaloty limitations prior to
irse. ’ This practice is under the jurisdiction of ASTM Committee
D-24 on Carbon Black, and is the direct responsibility of Sub
committee D24.61 on Carbon Black Sampling and Statistical
2. Referenced Document
. Analviic
C;Gnt edition approved March 27, 1987. Published May
2. I ASTM Standard:
1987. Originally published as D 305 1 - 72. Last previous edition
D 3396 Practice for Carbon Black-Measuring
D3051- 76(1981).
the Precision of ASTM Test Methods’ ’Annual Èmk O~ASTM Siandards, Vol 09.01.

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ASTM D305L 87 U 0759530 0028702 7 U
-D 3051-
sion is expressed in absolute terms.
3.6 reproducibility standard deviation, sL-a
X2. Single Test:
measure of the agreement between test results
X2.1 Repeatabilily (Single-Operator)-The repeat-
obtained in different laboratories on different
ability has been estimated to be f (insert 2swwith units
days by different technicians applying the same
of measurement). Two test results are significantly dif-
test method to essentially the same sample.
ferent if their difference exceeds (insert 2swh with
units of measurement).
3.7 repeatability coeflcient of variation, uW
X2.2 Reproducibility (Mu1tilaboratory)-The re-
percent-the repeatability standard deviation di-
producibility has been estimated to be f (insert 2s~
vided by the average value of the test results from
with units of measurement). Two test results are Sig-
which it was calculated and then multiplied by
nificantly different if their difference exceeds (insert
100 %.
2sL& with units of measurement).
X3. Duplicate Test Average:
3.7.1 Discussion-This statistic is used as a
X3. i Repeatability (Single-Operator)-The repeat-
measure of the agreement between test results
ability has been estimated to be f (insert 2swwith
...