ASTM D1113-90a(2001)
(Test Method)Standard Test Method for Vegetable Matter and Other Alkali-Insoluble Impurities in Scoured Wool
Standard Test Method for Vegetable Matter and Other Alkali-Insoluble Impurities in Scoured Wool
SIGNIFICANCE AND USE
Test Method D 1113 is considered satisfactory for acceptance testing of commercial shipments, and the procedure has been used extensively in the trade for this purpose, particularly in connection with the determination of clean wool fiber present by Test Method D 584. The procedure in Test Method D 1113 is used by the U.S. Customs Service for the determination of the vegetable matter in importations of raw wool on which the allowance for loss of wool during commercial cleaning is based in part.3
5.1.1 In case of a dispute arising from differences in reported test results when using Test Method D 1113 for acceptance testing of commercial shipments, the purchaser and the supplier should conduct comparative tests to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens that are as homogeneous as possible and that are from a lot of material of the type in question. The test specimens should then be randomly assigned in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared using Students t-test for unpaired data and an acceptable probability level chosen by the two parties before the testing is begun. If a bias is found, either its cause must be found and corrected or the purchaser and the supplier must agree to interpret future test results in light of the known bias.
SCOPE
1.1 This test method covers the determination of the content of oven-dried, ash-free, alcohol extractive-free vegetable matter and other alkali-insoluble impurities present in scoured wool. It is also applicable to "related fibers" such as the hair from the goat, camel, alpaca, and other animals.
Note 1--The determination of clean wool fiber present on a laboratory scale is covered in Test Method D584, the determination of clean wool fiber present on a commercial scale is covered in Test Method D1334, and the calculation of commercial weight and yield of various commercial compositions (formerly covered in Appendix to Test Method D584) is covered in Practice D2720.
1.2 This standard does not purport to address all of the safety problems 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. For specific safety precaution statements, see Section 8.
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Standards Content (Sample)
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Designation:D1113–90a(Reapproved2001)
Standard Test Method for
Vegetable Matter and Other Alkali-Insoluble Impurities in
Scoured Wool
This standard is issued under the fixed designation D 1113; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.2 oven-dried, adj—the condition of a material that has
been heated under prescribed conditions of temperature and
1.1 This test method covers the determination of the content
humidity until there is no further significant change in its mass.
of oven-dried, ash-free, alcohol extractive-free vegetable mat-
3.1.2.1 Discussion—An oven-dried material will retain a
ter and other alkali-insoluble impurities present in scoured
small amount of moisture that is dependent on the temperature
wool. It is also applicable to “related fibers” such as the hair
and relative humidity of the atmosphere in contact with the
from the goat, camel, alpaca, and other animals.
materialduringthedryingprocess.Anoven-driedmaterialwill
NOTE 1—The determination of clean wool fiber present on a laboratory
only be moisture-free when the air supplied to the drying oven
scale is covered in Test Method D 584, the determination of clean wool
has been previously desiccated.
fiberpresentonacommercialscaleiscoveredinTestMethodD 1334,and
3.1.2.2 Discussion—The term “mass” in the above defini-
the calculation of commercial weight and yield of various commercial
tionisthecorrectdesignationforwhatiscommonlydesignated
compositions (formerly covered in Appendix to Test Method D 584) is
“weight”.
covered in Practice D 2720.
3.1.3 vegetable matter base, n— in raw wool, oven-dried
1.2 This standard does not purport to address all of the
scoured burrs, seeds, twigs, leaves, and grasses, free of mineral
safety concerns, if any, associated with its use. It is the
matter and alcohol-extractable matter.
responsibility of the user of this standard to establish appro-
3.1.4 For the definition of wool and other textile terms used
priate safety and health practices and determine the applica-
in this method, refer to Terminology D 123.
bility of regulatory limitations prior to use. For specific safety
hazard statements, see Section 8.
4. Summary of Test Method
4.1 The wool, or other animal fiber, is dissolved in a boiling
2. Referenced Documents
3% sodium hydroxide solution or a hot 10% sodium hydroxide
2.1 ASTM Standards:
2 solution under specified controlled conditions. The weights of
D 123 Terminology Relating to Textiles
theash-free,oven-driedcomponentsoftheundissolvedresidue
D 584 Test Method for Wool Content of Raw Wool—
are converted by means of tabulated factors to the correspond-
Laboratory Scale
ing weights of vegetable matter base and other alkali-insoluble
D 1334 Test Method for Wool Content of Raw Wool—
impurities.
Commercial Scale
D 2720 Practice for Calculation of Commercial Weight and
5. Significance and Use
Yield of Scoured Wool, Top, and Noil for Various Com-
5.1 Test Method D 1113 is considered satisfactory for ac-
mercial Compositions
ceptance testing of commercial shipments, and the procedure
has been used extensively in the trade for this purpose,
3. Terminology
particularly in connection with the determination of clean wool
3.1 Definitions:
fiber present by Test Method D 584. The procedure in Test
3.1.1 other alkali-insoluble impurities, n—inscouredwool,
Method D 1113 is used by the U.S. Customs Service for the
the oven-dried, ash-free, alcohol-extractives-free, alkali-
determination of the vegetable matter in importations of raw
insoluble substances other than vegetable matter base, such as
wool on which the allowance for loss of wool during commer-
skin, cotton or other fibers, paper string, tag (dung) pieces, and
cial cleaning is based in part.
paint pieces, etc.
5.1.1 In case of a dispute arising from differences in
reported test results when using Test Method D 1113 for
acceptance testing of commercial shipments, the purchaser and
ThistestmethodisunderthejurisdictionofASTMCommitteeD13onTextiles,
and is the direct responsibility of Subcommittee D13.13 on Wool and Wool Felt.
Current edition approved Dec. 31, 1990. Published March 1991. Originally
published as D1113–50T. Last previous edition D1113–78 (1983). Tariff Schedules of the United States, Schedule 3, Part 1, Subpart C, Headnote
Annual Book of ASTM Standards, Vol 07.01. 1(c).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D 1113
the supplier should conduct comparative tests to determine if scoured wool is judged to contain over 5 % of vegetable matter
there is a statistical bias between their laboratories. Competent and sufficient scoured wool is available, prepare another
statistical assistance is recommended for the investigation of replicate, that is, a second laboratory sample unit.
bias.As a minimum, the two parties should take a group of test 9.2.2 For tests on samples of scoured wool not obtained in
specimens that are as homogeneous as possible and that are connection withTest Methods D 584 and D 1334 take replicate
from a lot of material of the type in question. The test sample units as directed in 9.2.1.
specimens should then be randomly assigned in equal numbers 9.3 Test Specimens—As test specimens, prepare two test
to each laboratory for testing.The average results from the two specimens from each laboratory sampling unit by combining
laboratories should be compared using Students t-test for ten or more pinches of fiber into a bundle having a mass of 40
unpaireddataandanacceptableprobabilitylevelchosenbythe 61g.
two parties before the testing is begun. If a bias is found, either
its cause must be found and corrected or the purchaser and the 10. Conditioning
supplier must agree to interpret future test results in light of the
10.1 Dry specimens taken as directed in 9.1 under the
known bias.
conditions for oven drying prescribed in Test Method D 584.
10.2 Weigh specimens taken as directed in 9.2 in the
6. Apparatus
condition as received, in the oven-dry condition, or after
6.1 Filter, 40-mesh sieve (U. S. Sieve Series, opening
exposure in the standard atmosphere for testing textiles,
0.0165 in. (0.42 mm)) or metal screen, or cheese cloth having
dependinguponthedirectionsorrequirementsoftheinterested
comparable openings.
parties.
6.2 Oven—Aforced-draft oven designed to supply clean air
10.3 Weigh specimens (10.1 or 10.2) to the nearest 0.01 g.
at a desired temperature with a tolerance of 62°C.
(W ).
6.3 Muffle Furnace, thermostatically controlled in the range
of 700 6 25°C.
11. Procedure
6.4 Beakers—Heat resistant glass or stainless steel, of
11.1 Preferred Method—In a 2-L heat-resistant glass or
2-litre capacity.
stainlesssteelbeaker,bring1Lof3 %NaOHsolutiontoaboil.
With the solution at a boil, carefully add the entire weighed
7. Reagents and Materials
specimen. Quickly immerse the wool in the NaOH solution
7.1 Sodium Hydroxide Solution (NaOH), 3 % by weight.
with the aid of a stirring rod, and adjust the heat to resume
7.2 Sodium Hydroxide Solution, 10 % by weight.
boilingofthesolution.Boilthesolutiongentlywithcontinuous
7.3 Sodium Hypochlorite Solution (NaOCl), 5 % by
stirring for 90 6 2 s. Remove the beaker from the heat and add
weight.
500 ml of tap water, stir, then allow to settle.
NOTE 3—Thepreferredmethoduses3 %sodiumhydroxidesolution,in
8. Hazards
which most wools are soluble when treated as directed. However, certain
8.1 Sodiumhydroxideisextremelycorrosive,andcaremust
coarse, dry carpet wools do not dissolve completely in the 3 % solution.
be exercised to avoid contact with the eyes, skin, or clothing.
For such wools the alternative method (11.1.1), in which 10 % sodium
8.2 Operators should wear eye protection while handling hydroxide solution is used, is necessary.
NOTE 4—Keep depilatory in pulled wool specimens to a minimum by
caustic solutions.
treating the sample as directed in 10.3 of Test Method D 584.
9. Sampling
11.1.1 Alternative Method (Note 2)—In a 2-Lheat-resistant
9.1 Lot Sample—As a lot sample for acceptance testing,
glass or stainless steel beaker, bring 600 cm (mL) of 10 %
take at random the number of shipping containers directed in
NaOH solution to a boil. Remove the beaker from the heat,
an applicable material specification or other agreement be-
place on a dry wooden or asbestos mat, and immediately add
tween the purchaser and the supplier. Consider shipping
the weighed specimen. Stir continuously for 3 min 65s,add
containers to be the lot sampling unit.
1000 mL of tap water, stir, and allow to settle.
11.2 Filtration—Decant the solution through the 40-mesh
NOTE 2—An adequate specification or other agreement between the
filter, using a stirring rod or a jet of water to assist filtration by
purchaser and the supplier requires taking into account the variability
agitation of the solution on the filter. Wash all the remaining
between shipping containers, between laboratory sampling units within a
shipping container, and between test specimens within a laboratory vegetable matter and other alkali-insoluble impurities in the
sampling unit to produce a sampling plan w
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