ASTM D2525-13

Standard Practice for Sampling Wool for Moisture (Withdrawn 2022)

SIGNIFICANCE AND USE
5.1 This recommended practice furnishes directions for the sampling of wool of the various forms indicated in Section 1, in order that correct probability statements may be made about the relationship between the sample mean and the population mean. If these statements are to be correct, certain conditions, which are stated, must hold.  
5.2 This recommended practice requires that a deliberate act of randomization be performed so that all potential sampling units have approximately the same chance of being taken and no sampling unit is deprived of its chance of being taken.  
5.3 In any case where insufficient information about the variability of the sampling units within the lot is available, directions are given for calculating confidence limits for the sample mean so that a correct probability statement can still be made.
SCOPE
1.1 This practice covers the design of a sampling plan to be used to obtain samples for the determination of the moisture content of grease wool, scoured wool, carded wool, garnetted wool, wool top and intermediate products, and rovings.  
1.2 Directions are given for the designation of sampling units, calculation of the number of sampling units required to achieve a preselected precision and confidence level or, alternatively, for calculating the confidence limits for the mean based on the variability of the sample tested. Note 1—This practice for devising a sampling plan is intended for use in connection with Test Method D1576 or Test Method D2462. The sampling of raw wool for the determination of clean wool fiber present is covered in Practice D1060.  
1.3 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.

General Information

• Status: Historical
• Publication Date: 30-Jun-2013
• ICS: 59.060.10 - Natural fibres
• Technical Committee: D13 - Textiles
• Drafting Committee: D13.13 - Wool and Felt

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D2525 − 13
Standard Practice for
1
Sampling Wool for Moisture
This standard is issued under the fixed designation D2525; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
1.1 This practice covers the design of a sampling plan to be
3.1 For all terminology related to D13.13, Wool and Felt,
used to obtain samples for the determination of the moisture
see Terminology D4845.
content of grease wool, scoured wool, carded wool, garnetted
3.1.1 The following terms are relevant to this standard:
wool, wool top and intermediate products, and rovings.
laboratory sample, lot lot sample, sample, sampling unit,
specimen.
1.2 Directions are given for the designation of sampling
units, calculation of the number of sampling units required to
3.2 FordefinitionsofallothertextiletermsseeTerminology
achieve a preselected precision and confidence level or,
D123.
alternatively,forcalculatingtheconfidencelimitsforthemean
based on the variability of the sample tested.
4. Summary of Practice
NOTE 1—This practice for devising a sampling plan is intended for use
4.1 Directions are given for subdividing a lot of material
in connection with Test Method D1576 or Test Method D2462. The
sampling of raw wool for the determination of clean wool fiber present is into potential sampling units and for providing each potential
covered in Practice D1060.
sampling unit with its own unique identification.
1.3 This standard does not purport to address all of the
4.2 Directions are given for calculating the number of such
safety concerns, if any, associated with its use. It is the
sampling units required to give a preselected allowable varia-
responsibility of the user of this standard to establish appro-
tion at a stated probability level, or for calculating confidence
priate safety and health practices and determine the applica-
limitsforthesamplemeanobtainedforagivensizeofsample.
bility of regulatory limitations prior to use.
4.3 Directions are given for deciding which particular sam-
2. Referenced Documents pling units should be chosen to constitute the required lot
2 sample. These directions ensure that all potential sampling
2.1 ASTM Standards:
unitshaveapproximatelythesamechanceofbeingselectedfor
D123Terminology Relating to Textiles
the lot sample.
D1060PracticeforCoreSamplingofRawWoolinPackages
for Determination of Percentage of Clean Wool Fiber
5. Significance and Use
Present
D1576Test Method for Moisture in Wool by Oven-Drying
5.1 This recommended practice furnishes directions for the
D2462Test Method for Moisture in Wool by Distillation
sampling of wool of the various forms indicated in Section 1,
With Toluene
in order that correct probability statements may be made about
D4845Terminology Relating to Wool
the relationship between the sample mean and the population
E122PracticeforCalculatingSampleSizetoEstimate,With
mean. If these statements are to be correct, certain conditions,
Specified Precision, the Average for a Characteristic of a
which are stated, must hold.
Lot or Process
5.2 Thisrecommendedpracticerequiresthatadeliberateact
of randomization be performed so that all potential sampling
units have approximately the same chance of being taken and
1
This practice is under the jurisdiction of theASTM Committee D13 onTextiles
no sampling unit is deprived of its chance of being taken.
and is the direct responsibility of Subcommittee D13.13 on Wool and Felt.
Current edition approved July 1, 2013. Published August 2013. Originally
5.3 In any case where insufficient information about the
approved in 1966. Last previous edition approved in 2008 as D2525–90 (2008).
DOI: 10.1520/D2525-13.
variability of the sampling units within the lot is available,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
directions are given for calculating confidence limits for the
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
samplemeansothatacorrectprobabilitystatementcanstillbe
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. made.
Copyright ©ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA19428-2959. United States
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D2525 − 13
6. Preliminary Conditions pling unit should be made to coincide with the size of the
specimen required by the method of measurement because the
6.1 If it is desired to calculate a sample size to achieve a
random variations observed in the test results are then directly
preselected precision at a preselected level of confide
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D2525 − 90 (Reapproved 2008) D2525 − 13
Standard Practice for
1
Sampling Wool for Moisture
This standard is issued under the fixed designation D2525; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This practice covers the design of a sampling plan to be used to obtain samples for the determination of the moisture content
of grease wool, scoured wool, carded wool, garnetted wool, wool top and intermediate products, and rovings.
1.2 Directions are given for the designation of sampling units, calculation of the number of sampling units required to achieve
a preselected precision and confidence level or, alternatively, for calculating the confidence limits for the mean based on the
variability of the sample tested.
NOTE 1—This practice for devising a sampling plan is intended for use in connection with Test Method D1576 or Test Method D2462. The sampling
of raw wool for the determination of clean wool fiber present is covered in Practice D1060.
1.3 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D123 Terminology Relating to Textiles
D1060 Practice for Core Sampling of Raw Wool in Packages for Determination of Percentage of Clean Wool Fiber Present
D1576 Test Method for Moisture in Wool by Oven-Drying
D2462 Test Method for Moisture in Wool by Distillation With Toluene
D4845 Terminology Relating to Wool
E122 Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or
Process
3. Terminology
3.1 Definitions:
3.1.1 laboratory sample, n—a portion of material taken to represent the lot sample, or the original material, and used in the
laboratory as a source of test specimens.
3.1.2 lot, n—in acceptance sampling, that part of a consignment or shipment consisting of material from one production lot.
3.1.3 lot sample, n—one or more shipping units taken at random to represent an acceptance sampling lot and used as a source
of laboratory samples.
3.1.4 sample, n—(1) a portion of a lot of material which is taken for testing or record purposes.
(2) the group of specimens used, or observations made, which provide information that can be used for making statistical
inferences about the population from which they were drawn.
3.1.5 sampling unit, n— in wool, a portion of material that is taken at one time from one physical location and that is combined
with similar portions to make up the laboratory sample.
1
This practice is under the jurisdiction of the ASTM Committee D13 onTextiles and is the direct responsibility of Subcommittee D13.13 on Wool and Felt.
Current edition approved Aug. 1, 2008July 1, 2013. Published October 2008August 2013. Originally approved in 1966. Last previous edition approved in 20012008 as
D2525 – 90 (2001).(2008). DOI: 10.1520/D2525-90R08.10.1520/D2525-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3.1.5.1 Discussion—
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D2525 − 13
A sampling unit may or may not have the same physical size as a specimen. Examples of sampling units include: (1) for bulk
materials seen as scoured wool, a handful of wool conforming to a stated mass range, (2) for cored material, a minimum mass of
material collected by one insertion of a coring tool, (3) for sliver, a stated length of material, and (4) a single package, such as a
ball of top.
3.1.6 specimen, n—a specific portion of a material or a laboratory sample upon which a test is performed or which is selected
for that purpose.
3.1.7 For definitions of moisture, moisture content, moisture regain, and other textile terms used in this practice, refer to
Terminology D123.
3.1 For all terminology related to D13.13, Wool and Felt, see Terminology D4845.
3.1.1 The fol
...