ASTM D4085-93(2013)
(Test Method)Standard Test Method for Metals in Cellulose by Atomic Absorption Spectrophotometry
Standard Test Method for Metals in Cellulose by Atomic Absorption Spectrophotometry
SIGNIFICANCE AND USE
4.1 Manganese in pulp acts as a catalyst in oxidizing cellulose.
4.2 Iron in pulp can cause yellowness in rayon fibers and influence cellulose acetate plastics color. Iron also causes problems in photographic and blueprint papers.
4.3 Copper in pulp can act as a retardant in oxidizing cellulose and can affect viscose ripening. Copper interferes with the dye level of rayon fibers and influences cellulose acetate plastics color.
4.4 Calcium in pulps can cause problems in processing into acetate, rayon, cellophane, etc. Calcium can create undesirable deposits in viscose spinning and film casting operation. Calcium can influence viscosity control during cellulose acetate manufacture.
SCOPE
1.1 This test method covers the determination of the iron, copper, manganese, and calcium content of cellulose pulp from wood or cotton.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D4085 − 93 (Reapproved 2013)
Standard Test Method for
Metals in Cellulose by Atomic Absorption
1
Spectrophotometry
This standard is issued under the fixed designation D4085; 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 the ground-state element in the flame. A hollow cathode lamp
whose cathode is made of the element to be determined
1.1 This test method covers the determination of the iron,
provides the radiation. The metal atoms to be measured are
copper, manganese, and calcium content of cellulose pulp from
placed in the beam of radiation by aspirating the specimen into
wood or cotton.
an oxidant-fuel flame. A monochromator isolates the charac-
1.2 The values stated in SI units are to be regarded as
teristic radiation from the hollow cathode lamp and a photo-
standard. No other units of measurement are included in this
sensitive device measures the attenuated transmitted radiation.
standard.
4. Significance and Use
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4.1 Manganese in pulp acts as a catalyst in oxidizing
responsibility of the user of this standard to establish appro-
cellulose.
priate safety and health practices and determine the applica-
4.2 Iron in pulp can cause yellowness in rayon fibers and
bility of regulatory limitations prior to use.
influence cellulose acetate plastics color. Iron also causes
problems in photographic and blueprint papers.
2. Referenced Documents
2
4.3 Copper in pulp can act as a retardant in oxidizing
2.1 ASTM Standards:
cellulose and can affect viscose ripening. Copper interferes
D1193 Specification for Reagent Water
with the dye level of rayon fibers and influences cellulose
D1348 Test Methods for Moisture in Cellulose
acetate plastics color.
D3516 Test Methods for Ashing Cellulose
E177 Practice for Use of the Terms Precision and Bias in
4.4 Calcium in pulps can cause problems in processing into
ASTM Test Methods
acetate, rayon, cellophane, etc. Calcium can create undesirable
E691 Practice for Conducting an Interlaboratory Study to
deposits in viscose spinning and film casting operation. Cal-
Determine the Precision of a Test Method
cium can influence viscosity control during cellulose acetate
manufacture.
3. Summary of Test Method
5. Apparatus
3.1 The sample is ashed in accordance with Test Methods
D3516.
5.1 Atomic Absorption Spectrophotometer, consisting of an
atomizer and burner, suitable pressure-regulating devices ca-
3.2 This test method is dependent on the fact that metallic
pable of maintaining constant oxidant and fuel pressure for the
elements in the ground state will absorb light of the same
duration of the test, a hollow cathode lamp for each metal to be
wavelength they emit when excited. When radiation from a
tested, an optical system capable of isolating the desired line of
given excited element is passed through a flame containing
radiation, an adjustable slit, a photomultiplier tube or other
ground-state atoms of that element, the intensity of the trans-
photosensitivedevice,andaread-outmechanismforindicating
mitted radiation will decrease in proportion to the amount of
the amount of absorbed radiation.
5.2 Oxidant—Air, which has been cleaned and dried
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This test method is under the jurisdiction of ASTM Committee D01 on Paint
through a suitable filter to remove oil, water, and other foreign
and Related Coatings, Materials, andApplications and is the direct responsibility of
Subcommittee D01.36 on Cellulose and Cellulose Derivatives.
substances, is the usual oxidant.
Current edition approved June 1, 2013. Published June 2013. Originally
5.3 Fuel—Acetylene, commercially available, is the usual
approved in 1981. Last previous edition approved in 2008 as D4085 – 93 (2008).
DOI: 10.1520/D4085-93R13.
fuel. Acetone, always present in acetylene cylinders, can be
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
prevented from entering and damaging the burner head by
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
replacing a cylinder that has a gage pressure of only 3.5 kPa
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. (50 psi) remaining.
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D4085 − 93 (2013)
5.4 Volumetric Flasks, 25, 100, and 1000-mL. determination. Ash the sample by Method D in Test Methods
D3516. Determine moisture content in ac
...
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