ASTM D465-01

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D465–01
Standard Test Methods for
Acid Number of Naval Stores Products Including Tall Oil
1
and Other Related Products
This standard is issued under the fixed designation D 465; 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. Significance and Use
1.1 Thesetestmethodsareintendedfordeterminingtheacid 3.1 These test methods are designed to broaden the scope of
number of naval store products as defined in Terminology the previous edition of the test method by the inclusion of tall
2
D 804 including tall oil products, wood and gum rosin, and oil and tall oil derived products as test materials. Test Methods
other related materials. These test methods may not be appli- D 803 currently includes a method for the determination of
cable to all modified rosin products. Two test methods are acidnumber.Thedetailsofthatprocedurewillbedeletedwhen
covered, as follows: Test Methods D 803 are revised.
1.1.1 Potentiometric method (referee), and 3.2 Theacidnumberisanimportantpropertyofnavalstores
1.1.2 Internal indicator method (alternate). products,talloil,andtheproductsobtainedbythefractionation
1.2 The potentiometric method is suitable for use with both of tall oil. It is the test method widely used to determine the
light- and dark-colored products. It should be considered the total free acid content of these products.
referee method. The internal indicator method is suitable for 3.3 Thepotentiometrictestmethodshouldbeusedwhenthe
use only with light- and medium-colored products with a most reproducible results are required.
Gardner color of less than 12. It should be considered the
4. Preparation of Sample
alternate method.
1.3 This standard does not purport to address all of the 4.1 If the sample for analysis is rosin, it shall consist of
small pieces of rosin chipped from a freshly exposed part of a
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- lump or lumps, and thereafter crushed to facilitate weighing
and dissolution. Prepare the sample the same day on which the
priate safety and health practices and determine the applica-
test is begun, in order to avoid changes in properties due to
bility of regulatory limitations prior to use.
surface oxidation. This is very pronounced on ground rosin
2. Referenced Documents
having a large surface area exposed to the air. Existing rosin
2.1 ASTM Standards: dust and powdered rosin must not be used.
2
D 803 Test Methods of Testing Tall Oil 4.2 If the sample is a nonhomogenous liquid, heat the entire
D 804 TerminologyRelatingtoNavalStores,IncludingTall sample in a closed container fitted with a capillary vent or the
2
Oil and Other Related Products equivalent. Some kind of agitation, even if done occasionally
E70 Test Method for pH of Aqueous Solutions with the byhand,savesmuchtime.Heatbyimmersioninopensteamor
3
Glass Electrode hot water bath to avoid overheating. When dealing with
E 177 Practice for the Use of the Terms Precision and Bias crystallized rosin a temperature of approximately 160°C may
4
in ASTM Test Methods be needed. Sampling should take place only when the entire
E 691 Practice for Conducting an Interlaboratory Study to sample is homogeneous and has been well stirred.
4
Determine the Precision of a Test Method 4.3 For other products no special preparation is necessary
except storage in a closed container prior to testing.
4.4 Guideline for sample size, solvent, and titrant:
1
These test methods are under the jurisdiction of ASTM Committee D01 on Sample Size, Solvent I, Solvent II, Titrant,
Paint and Related Coatings, Materials, and Applications, and are the direct Sample g mL mL KOH
responsibility of Subcommittee D01.34 on Naval Stores.
Fatty acids 4.0 6 0.05 Isopropyl al- None 0.5N
Current edition approved June 10, 2001. Published August 2001. Originally
A
DTO cohol, or
published as D 465 – 37 T. Last previous edition D 465 – 96.
2
methanol 100
Annual Book of ASTM Standards, Vol 06.03.
3
Rosin soap
Annual Book of ASTM Standards, Vol 15.05.
4
Annual Book of ASTM Standards, Vol 14.02.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D465–01
solution. Protect the standardized solution against evaporation
FA esters 20 6 0.1 Isopropyl al- None 0.1N
cohol, or
and absorption of carbon dioxide (CO ) from the air. The
2
methanol 100
solution should be standardized frequently, either potentio-
Rosin 4.0 6 0.05 Toluene 25 Isopropyl al- 0.5N
A
CTO coh
...