ASTM D982-05

Standard Test Method for Organic Nitrogen in Paper and Paperboard

SCOPE
1.1 This test method covers the determination of nitrogenous organic materials in paper and paperboard, which typically are used to reduce the thermal degradation of the cellulose in the paper and paperboard.
1.2 The nitrogen determination by this method does not include the nitrogen in nitro compounds, nitrates, nitrites, azo, hydrazine, cyanide, or pyridine ring-type compounds, none of which are normally found in paper and paperboard. There is no known modification of the method that is applicable to all nitrogenous compounds.

General Information

• Status: Historical
• Publication Date: 30-Sep-2005
• ICS: 85.060 - Paper and board
• Technical Committee: D09 - Electrical and Electronic Insulating Materials

Relations

• Replaced By: ASTM D982-05(2009) - Standard Test Method for Organic Nitrogen in Paper and Paperboard
• Effective Date: 01-Oct-2009

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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.
An American National Standard
Designation:D982–05 Technical Association of Pulp
and Paper Industry
Standard Method T 418 os-61
Standard Test Method for
1
Organic Nitrogen in Paper and Paperboard
This standard is issued under the fixed designation D982; 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 tures. Such a paper or paperboard is referred to in the industry
as “thermally upgraded.” A paper or paperboard that is ther-
1.1 This test method covers the determination of nitrog-
mally upgraded can withstand higher operating temperatures
enous organic materials in paper and paperboard, which
and allow the electrical equipment to have a longer useful life
typically are used to reduce the thermal degradation of the
span.
cellulose in the paper and paperboard.
1.2 The nitrogen determination by this method does not
5. Apparatus
include the nitrogen in nitro compounds, nitrates, nitrites, azo,
5.1 Kjeldahl Apparatus, with 500 or 800-mL flask and a
hydrazine, cyanide, or pyridine ring-type compounds, none of
digestion rack, an efficient bulb or scrubber type of trap to
which are normally found in paper and paperboard.There is no
ensure that no nonvolatile alkali is carried over, the trap being
known modification of the method that is applicable to all
connected to the flask with a rubber stopper and to the
nitrogenous compounds.
water-cooled condenser following, with rubber tubing. The
2. Referenced Documents condenser tube shall be made of alkali-resistant glass or block
2
tin with the discharge end connected to a bent glass delivery
2.1 ASTM Standards:
tube, the lower end of which is drawn out to a bore of about 3
D585 Practice for Sampling and Accepting a Single Lot of
mm.
Paper, Paperboard, Fiberboard, and Related Product
5.2 Other Apparatus—500-mL Erlenmeyer flask, 100-mL
D644 Test Method for Moisture Content of Paper and
graduatedcylinder,50-mLburet,andmossyzincorglassbeads
Paperboard by Oven Drying
for the flask to prevent bumping.
3. Summary of Test Method
6. Reagents
3.1 This test method is a modification of the well-known
6.1 Purity of Reagents—Reagent grade chemicals shall be
Kjeldahl procedure. In this test method, compounds that yield
used in all tests. Unless otherwise indicated, it is intended that
their nitrogen as ammonia are digested with concentrated
all reagents shall conform to the specifications of the Commit-
sulfuric acid, using sodium sulfate to raise the boiling point,
tee onAnalytical Reagents of theAmerican Chemical Society,
and mercuric oxide as a catalyst. The organic matter is
3
where such specifications are available. Other grades are also
destroyed and the nitrogen is fixed as ammonium sulfate in the
acceptable, provided it is first ascertained that the reagent is of
excess acid.
sufficiently high purity to permit its use without lessening the
4. Significance and Use accuracy of the determination.
6.2 Purity of Water—Unless otherwise indicated, references
4.1 The purpose of this test method is to determine the
to water shall be understood to mean distilled water or water of
amount of organic nitrogen present within a sample of electri-
equal purity.
cal insulation paper or paperboard. Nitrogen content is used to
6.3 Boric Acid and Indicator Solution—Dissolve 43 g of
determine if the paper or paperboard has been chemically
boric acid (H BO ) (free from borax), 6 mL of methyl red
treated to withstand higher than normal operating tempera- 3 3
indicator, and 4 mL of methylene blue indicator, each 0.1 g in
100 mL of 95 % ethyl alcohol, per litre of freshly distilled
1
water. Keep the solution in a borosilicate glass bottle. It is
This test method is under the jurisdiction of ASTM Committee D09 on
Electrical and Electronic Insulating Materials and is the direct responsibility of
stable for at least 6 months.
Subcommittee D09.19 on Dielectric Sheet and Roll Products.
NOTE 1—An alternative indicator mixture preferred by some for the
Current edition approved October 1, 2005. Published October 2005. Originally
approved in 1948. Last previous edition approved in 1971 as D982 – 63(1971),
which was withdrawn August 1981 and reinstated October 2005. DOI: 10.1520/
3
D0982-05. Reagents Chemicals,American Chemical Society Specifications,”Am. Chemi-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or cal Soc., Washington, DC. For suggestions on the testing of reagents not listed by
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM theAmerican Chemical Society, see “Reagent Chemicals and Standards,” by Joseph
Standards volume information, refer to
...