ASTM E832-81(2013)
(Specification)Standard Specification for Laboratory Filter Papers
Standard Specification for Laboratory Filter Papers
ABSTRACT
This specification provides complete evaluation procedures for two types of laboratory filter papers used in chemical analysis. The filter papers covered in this specification are grouped into two types according to which type of analysis each is used for, and seven classes according to flow rate and the type of precipitate it filters. The products should be made of materials and manufactured by methods which will ensure that each product would conform to the required values of ash content, wet bursting strength, maximum water flow rate, and precipitate retention.
SCOPE
1.1 This specification covers two types of filter paper for use in chemical analysis and provides procedures for the complete evaluation of the filter papers.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
General Information
Relations
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Designation:E832 −81 (Reapproved 2013)
Standard Specification for
1
Laboratory Filter Papers
This standard is issued under the fixed designation E832; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3.1.1.5 Class D, hardened to facilitate scraping, for fine
precipitates, slow flow rate.
1.1 Thisspecificationcoverstwotypesoffilterpaperforuse
3.1.2 Type II—to be used for quantitative analysis (ashless
in chemical analysis and provides procedures for the complete
papers):
evaluation of the filter papers.
3.1.2.1 Class E, for coarse and gelatinous precipitates, fast
1.2 The values stated in SI units are to be regarded as
flow rate.
standard. No other units of measurement are included in this
3.1.2.2 Class F, for medium-size precipitates, medium flow
standard.
rate.
3.1.2.3 Class G, for fine precipitates, slow flow rate.
2. Referenced Documents
2
2.1 ASTM Standards:
4. Manufacture
D774/D774M Test Method for Bursting Strength of Paper
3
(Withdrawn 2010) 4.1 The papers shall be made from such materials and by
4
suchmethodsastoensurecompliancewiththerequirementsof
2.2 TAPPI Standards:
Section 10, and shall be clean and free of imperfections that
T 413 Ash in Paper
would affect their performance.
T 429 Alpha-Cellulose in Paper
T 509 HydrogenIonConcentration(pH)ofPaperExtracts—
4.2 The papers shall be converted into circles, sheets, or any
Cold Extraction Method
required sizes.
3. Types and Classes
5. General Requirements
3.1 The types and classes of filter paper are as follows:
5.1 All classes of filter paper shall comply with the require-
3.1.1 Type I—To be used for qualitative analysis (low ash
ments given in Table 1 and Table 2 and Section 11.
content):
3.1.1.1 Class AA, for very coarse and gelatinous
5.2 The ash content of the Type II circles shall not exceed
precipitates, very fast flow rate. 0.01 %.
3.1.1.2 Class A, for coarse and gelatinous precipitates, fast
5.3 Class D filter papers shall have a surface hard enough to
flow rate.
permit scraping collected precipitates off the sheet.
3.1.1.3 Class B, for medium-size precipitates, medium flow
rate.
6. Sampling
3.1.1.4 Class C, for fine precipitates, slow flow rate.
6.1 If testing is required, the sample of each class shall be
representative of the shipment, and specimens shall be taken at
1
This specification is under the jurisdiction of ASTM Commmittee E41 on
random from at least 3 % of the total packages.
Laboratory Apparatus and is the direct responsibility of Subcommittee E41.01 on
Apparatus.
Current edition approved Nov. 1, 2013. Published December 2013. Originally 7. Retests
approved in 1950. Last previous edition approved in 2008 as E832 – 81 (2008).
7.1 If the results of the tests indicate noncompliance with
DOI: 10.1520/E0832-81R13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
the requirements of Table 1 and Table 2, or other factors
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
described within this specification, take another representative
Standards volume information, refer to the standard’s Document Summary page on
sample of the shipment, selecting the specimens from different
the ASTM website.
3
packages than those from which the first sample was taken.
The last approved version of this historical standard is referenced on
www.astm.org.
4
7.2 Then test the second sample for compliance with this
Available from TechnicalAssociation of the Pulp and Paper Industry (TAPPI),
15 Technology Parkway South, Norcross, GA 30092, http://www.tappi.org. specification.
Copyright ©ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA19428-2959. United States
1
---------------------- Page: 1 ----------------------
E832−81 (2013)
TABLE 1 General Requirements
10.1.1.3 Test specimens, having a mass of at least 6 g,
Property Requirement representative of the sample obtained as prescribed in Section
alphacellulose content, min,% 95
6, and cut in the shape of whole circles of the same diameter or
pH value 5.0 to 8.0
small strips measured for area.
10.1.2 Procedure:
10.1.2.1 Heat the crucibles with their respective covers to
TABLE 2 Wet Bursting Strength
approximately 925°C. Cool in a desiccator and weigh to the
Water Flow Rate and Retention of Precipitates
nearest 0.1 mg. Add the specimen into crucible.
Maximum
Wet Bursting Retention of Pre-
Class
10.1.2.2 Heatthecoveredcrucibleplustestspecimengradu-
Water Flow
Stength min, cipitates—Filtrate
Rate,
ally until smoking ceases, remove cover, then continue heati
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.