Standard Practice for Conducting Proficiency Tests in the Chemical Analysis of Metals, Ores, and Related Materials

SCOPE
1.1 This practice provides direction for organizing and conducting proficiency test programs in analytical chemistry for metals, ores, and related materials. It is consistent with ISO/IEC Guide 43 and Guide E 1301. It does not address the selection and use of proficiency testing schemes by accrediting bodies.

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Historical
Publication Date
09-Jun-1999
Current Stage
Ref Project

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ASTM E2027-99 - Standard Practice for Conducting Proficiency Tests in the Chemical Analysis of Metals, Ores, and Related Materials
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: E 2027 – 99
Standard Practice for
Conducting Proficiency Tests in the Chemical Analysis of
1
Metals, Ores, and Related Materials
This standard is issued under the fixed designation E 2027; 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 ments, but does establish a framework for particular programs,
including those with either small or large numbers of partici-
1.1 This practice provides direction for organizing and
pants.
conducting proficiency test programs in analytical chemistry
4.1.1 WARNING: The data from proficiency testing pro-
for metals, ores, and related materials. It is consistent with
grams must never be used to assign certification values to the
ISO/IEC Guide 43 and Guide E 1301. It does not address the
materials used in the program. The elements of a properly
selection and use of proficiency testing schemes by accrediting
conceived and implemented certification program are de-
bodies.
scribed in detail in Guide E 1724.
2. Referenced Documents
4.2 Most accreditation bodies require that laboratories par-
2
ticipateregularlyinproficiencytestingprogramsthattheyhave
2.1 ASTM Standards:
accepted for the purpose. Therefore, it is essential that each
E 826 PracticeforTestingHomogeneityofMaterialsforthe
program comply with accepted principles including technical
Development of Reference Materials
requirements, statistical procedures (see Annex A1), and qual-
E 1187 Terminology Relating to Laboratory Accreditation
ity management (see Annex A2).
E 1301 Guide for Proficiency Testing by Interlaboratory
Comparisons
5. Types of Proficiency Testing
E 1724 Guide for Testing and Certification of Metal and
5.1 Proficiency testing techniques vary depending on the
Metal Related Reference Materials
3
nature of the test item, the method in use and the number of
2.2 ISO Standards:
laboratories participating. The most common approach in-
ISO Guide 25 General Requirements for the Competence of
volves randomly selected sub-samples from a source of mate-
Calibration and Testing Laboratories
rial being distributed simultaneously to participating testing
ISO Guide 43 Proficiency Testing by Interlaboratory Com-
laboratories for concurrent testing. It is essential that all of the
parisons
material from which the participants’ test materials are taken
ISO Guide 9000 Quality Management and Quality System
be sufficiently homogeneous so that any results later identified
Elements
as outliers should not be attributed to any significant test item
3. Terminology variability. After completion of the testing, the results are
returned to the coordinating body, and compared with the
3.1 Definitions—For formal definitions related to laboratory
assigned value(s) to give an indication of the performance of
accreditation, Terminology E 1187 applies.
the individual laboratories and the group as a whole.
4. Significance and Use
5.2 In some cases, separate portions of previously certified
reference materials are circulated.
4.1 This practice sets the basic requirements for proficiency
test programs in the chemical analysis of metals, ores, and
6. Organization and Design
related materials. It does not set specific procedural require-
6.1 Framework:
6.1.1 The design stage of any proficiency testing program
1
This practice is under the jurisdiction of ASTM Committee E01 on Analytical
requires the input of technical experts, statisticians and a
Chemistry of Metals, Ores, and Related Materials and is the direct responsibility of
program coordinator to ensure its success and smooth opera-
Subcommittee E01.22 on Statistics and Quality Control .
tion.
Current edition approved June 10, 1999. Published August 1999.
2
6.1.2 The coordinator, in consultation with these other
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
personnel, develops a program appropriate to the particular
Standards volume information, refer to the standard’s Document Summary page on
proficiencytest.Aproficiencytestprogramshallbedesignedto
the ASTM website.
3
Available from theAmerican National Standards Institute, 11West 42nd Street,
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13 Floor, New York, NY, 10036.
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E2027–99
avoid any confusion about its objectives. A plan shall be 6.2.2.3 Evaluate proficiency test results of participating
established and documented (seeAnnexA2) before the start of laboratories,
the program and shall include the follow
...

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