ASTM E2125-19
(Practice)Standard Practice for Microcrystal Testing in Forensic Analysis for Phencyclidine and Its Analogues
Standard Practice for Microcrystal Testing in Forensic Analysis for Phencyclidine and Its Analogues
SIGNIFICANCE AND USE
5.1 This technique involves a chemical-precipitation reaction between the phencyclidine or its analogues and the precipitating reagent. The habit and the aggregation of the crystals formed could be used to distinguish phencyclidine or its analogues from other drugs.
5.2 This technique can be utilized on phencyclidine or its analogues present in either the salt or free base form.
5.3 This technique does not distinguish between salt and free base forms.
SCOPE
1.1 This practice describes procedures applicable to the analysis of phencyclidine and its analogues using microcrystal tests (1-8).2
1.2 These procedures are applicable to phencyclidine and its analogues which are present in solid form or in a liquid form. They are not typically applicable to the analysis of phencyclidine and its analogues in biological samples.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 These procedures could generate observations indicating a positive test for phencyclidine and its analogues which could be incorporated into the analytical scheme as defined by the laboratory.
1.5 This standard cannot replace knowledge, skills, or abilities acquired through appropriate education, training, and experience (see Practice E2326) and is to be used in conjunction with sound professional judgment by individuals with such discipline-specific knowledge, skills, and abilities.
1.6 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: E2125 − 19 An American National Standard
Standard Practice for
Microcrystal Testing in Forensic Analysis for Phencyclidine
1
and Its Analogues
This standard is issued under the fixed designation E2125; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
Microcrystal tests are primarily chemical-precipitation tests in which a light microscope is used to
observe and distinguish the different types of crystals formed. These tests require skill and expertise
on the part of the analyst that can be adequately gained only through appropriate training and
experience in their use. These tests should not be attempted by those who are unfamiliar with them
for use in the analysis of phencyclidine and its analogues.
1. Scope 1.7 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 This practice describes procedures applicable to the
ization established in the Decision on Principles for the
analysis of phencyclidine and its analogues using microcrystal
2 Development of International Standards, Guides and Recom-
tests (1-8).
mendations issued by the World Trade Organization Technical
1.2 Theseproceduresareapplicabletophencyclidineandits
Barriers to Trade (TBT) Committee.
analogues which are present in solid form or in a liquid form.
They are not typically applicable to the analysis of phencycli-
2. Referenced Documents
dine and its analogues in biological samples.
3
2.1 ASTM Standards:
1.3 The values stated in SI units are to be regarded as
E1459Guide for Physical Evidence Labeling and Related
standard. No other units of measurement are included in this
Documentation
standard.
E1492Practice for Receiving, Documenting, Storing, and
Retrieving Evidence in a Forensic Science Laboratory
1.4 These procedures could generate observations indicat-
E1732Terminology Relating to Forensic Science
ing a positive test for phencyclidine and its analogues which
E2326Practice for Education and Training of Seized-Drug
could be incorporated into the analytical scheme as defined by
Analysts
the laboratory.
E2329Practice for Identification of Seized Drugs
1.5 This standard cannot replace knowledge, skills, or
E2548GuideforSamplingSeizedDrugsforQualitativeand
abilities acquired through appropriate education, training, and
Quantitative Analysis
experience (see Practice E2326) and is to be used in conjunc-
E2764PracticeforUncertaintyAssessmentintheContextof
tion with sound professional judgment by individuals with such
4
Seized-Drug Analysis (Withdrawn 2020)
discipline-specific knowledge, skills, and abilities.
1.6 This standard does not purport to address all of the
3. Terminology
safety concerns, if any, associated with its use. It is the
3.1 Definitions:
responsibility of the user of this standard to establish appro-
3.1.1 For definitions of terms used in this standard, refer to
priate safety, health, and environmental practices and deter-
Terminology E1732.
mine the applicability of regulatory limitations prior to use.
3.2 Definitions of Terms Specific to This Standard:
1
This practice is under the jurisdiction of ASTM Committee E30 on Forensic
3
Sciences and is the direct responsibility of Subcommittee E30.01 on Criminalistics. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Nov. 1, 2019. Published December 2019. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2001. Last previous edition approved in 2011 as E2125– 11. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/E2125-19. the ASTM website.
2 4
The boldface numbers in parentheses refer to a list of references at the end of The last approved version of this historical standard is referenced on
this standard. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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---------------------- Page: 1 ----------------------
E2125 − 19
3.2.1 aggregation, n—the collecting of units or parts into a sample could reduce the interference. The higher the concen-
mass or whole. tration of the adulterant, the more difficult it will be to observe
characteristiccrystals.Intheseinstances,itwillbenecessaryto
3.2.2 birefringence, n—property of some crystals, those
separate the phencyclidine or its analogues from the diluents/
having more than one refracti
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: E2125 − 11 E2125 − 19
Standard GuidePractice for
Microcrystal Testing in Forensic Analysis offor
1
Phencyclidine and Its Analogues
This standard is issued under the fixed designation E2125; 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.
INTRODUCTION
Microcrystal tests are primarily chemical-precipitation tests in which a light microscope is used to
observe and distinguish the different types of crystals formed. These tests require skill and expertise
on the part of the analyst that can be adequately gained only through appropriate training and
experience in their use. These tests should not be attempted by those who are unfamiliar with them
for use in the analysis of phencyclidine and its analogues.
1. Scope
1.1 This guidepractice describes some standard procedures applicable to the analysis of phencyclidine and its analogues using
2
microcrystal tests (1-8).
1.2 These procedures are applicable to phencyclidmephencyclidine and its analogues which are present in solid dosage form or
in a liquid form. They are not typically applicable to the analysis of phencyclidine and its analogues in biological samples.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 These procedures could generate observations indicating a positive test for phencyclidine and its analogues which could
be incorporated into the analytical scheme as defined by the laboratory.
1.5 This standard cannot replace knowledge, skill,skills, or abilityabilities acquired through appropriate education, training,
and experience (see Practice E2326) and should is to be used in conjunction with sound professional judgment.judgment by
individuals with such discipline-specific knowledge, skills, and abilities.
1.6 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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.7 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
3
2.1 ASTM Standards:
E1459 Guide for Physical Evidence Labeling and Related Documentation
E1492 Practice for Receiving, Documenting, Storing, and Retrieving Evidence in a Forensic Science Laboratory
E1732 Terminology Relating to Forensic Science
E2326 Practice for Education and Training of Seized-Drug Analysts
E2329 Practice for Identification of Seized Drugs
E2548 Guide for Sampling Seized Drugs for Qualitative and Quantitative Analysis
E2764 Practice for Uncertainty Assessment in the Context of Seized-Drug Analysis
1
This guidepractice is under the jurisdiction of ASTM Committee E30 on Forensic Sciences and is the direct responsibility of Subcommittee E30.01 on Criminalistics.
Current edition approved March 1, 2011Nov. 1, 2019. Published April 2011December 2019. Originally approved in 2001. Last previous edition approved in 20072011
as E2125 – 07.E2125 – 11. DOI: 10.1520/E2125-11.10.1520/E2125-19.
2
The boldface numbers in parentheses refer to a list of references at the end of this standard.
3
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 Standards
volume information, refer to the standard’sstandard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
E2125 − 19
3. Terminology
3.1 For definitions of terms used in this standard, refer to Terminology E1732.Definitions:
3.1.1 For definitions of terms used in this standard, refer to Terminology E1732.
3.2 Definitions:Definitions of Terms Specific to This Standard:
3.2.1 aggregation—aggregation, n—the collecting of units or parts into a mass or whole.
3.2.2 birefringence—birefringence, n—property of some crystals crystals, those havi
...
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