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  • ASTM
    D2525-13 Standard Practice for Sampling Wool for Moisture
    Edition: 2013
    $103.58
    Unlimited Users per year

Description of ASTM-D2525 2013

ASTM D2525 - 13

Standard Practice for Sampling Wool for Moisture

Active Standard ASTM D2525 | Developed by Subcommittee: D13.13

Book of Standards Volume: 07.01




ASTM D2525

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.

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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

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

E122 Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or Process


Keywords

moisture content; sampling; statistics; wool ;


ICS Code

ICS Number Code 59.060.10 (Natural fibres)


DOI: 10.1520/D2525

ASTM International is a member of CrossRef.

ASTM D2525

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About ASTM

ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.
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