Designation:E1968−11StandardGuideforMicrocrystalTestinginForensicAnalysisofCocaine1ThisstandardisissuedunderthefixeddesignationE1968;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONMicrocrystaltestsareprimarilychemical-precipitationtestsinwhichalightmicroscopeisusedtoobserveanddistinguishthedifferenttypesofcrystalsformed.Thesetestsrequireskillandexpertiseonthepartoftheanalystthatcanbegainedadequatelyonlythroughappropriatetrainingandexperienceintheiruse.Thesetestsshouldnotbeattemptedbythosewhoareunfamiliarwiththemforuseintheanalysisofcocaine.1.Scope1.1Thisguidedescribessomestandardproceduresappli-cabletotheanalysisofcocaineusingmultiplemicrocrystaltests(1-5).21.2Theseproceduresareapplicabletococaine,whichispresentinsoliddosageformoraninjectableliquidform.Theyarenottypicallyapplicabletotheanalysisofcocaineinbiologicalsamples.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandardcannotreplaceknowledge,skill,orabilityacquiredthroughappropriateeducation,training,andexperi-enceandshouldbeusedinconjunctionwithsoundprofes-sionaljudgment.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:3E1459GuideforPhysicalEvidenceLabelingandRelatedDocumentationE1492PracticeforReceiving,Documenting,Storing,andRetrievingEvidenceinaForensicScienceLaboratoryE1732TerminologyRelatingtoForensicScienceE2329PracticeforIdentificationofSeizedDrugsE2548GuideforSamplingSeizedDrugsforQualitativeandQuantitativeAnalysis3.Terminology3.1Fordefinitionsoftermsusedinthisstandard,refertoTerminologyE1...
