1、Designation: E1732 12Standard TerminologyRelating to Forensic Science1This standard is issued under the fixed designation E1732; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses ind
2、icates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This is a compilation of terms and correspondingdefinitions used in the forensic sciences. Legal or scientificterms that are generally understood or defined ade
3、quately inother readily available sources may not be included.1.2 A definition is a single sentence with additional infor-mation included in a Discussion. It is reviewed every fiveyears, and the year of last review or revision is appended.1.3 Definitions identical to those published by anotherstanda
4、rds organization or ASTM committee are identified withthe abbreviation of the name of the organization or theidentifying document and ASTM committee; for example,ASME is the American Society of Mechanical Engineering.21.4 Definitions of terms specific to a particular field areidentified with an abbr
5、eviation.32. Referenced Documents2.1 ASTM Standards:4E177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE456 Terminology Relating to Quality and StatisticsE1187 Terminology Relating to Conformity Assessment5E1301 Guide for Proficiency Testing by InterlaboratoryComparisons5E1402
6、 Guide for Sampling DesignE2161 Terminology Relating to Performance Validation inThermal Analysis2.2 ISO Standards:6ISO 3534:1993 (E/F) StatisticsVocabulary and SymbolsPart 1: Probability and General Statistical TermsPart 2: Statistical Quality ControlISO 9000:2005 (E) Standard Quality ManagementSys
7、temsFundamentals and VocabularyISO Guide 2 General Terms and Their Definitions Relatingto Standardizing ActivitiesISO Guide 30 Terms and Definitions Used in Connectionwith Reference MaterialsISO Guide 35 Reference MaterialsGeneral and StatisticalPrinciples for CertificationISO GUM Guide to the Expre
8、ssion of Uncertainty inMeasurement (GUM)2.3 Other Sources:EURACHEM The Fitness for Purpose of Analytical Meth-ods, EURACHEM Working Group, English EditionIAAI Glossary Glossary of Terms Related to Chemical andInstrumental Analysis of Fire Debris, IAAI ForensicScience Committee7IUPAC Terminology IUPA
9、C Compendium of Chemical Ter-minology, Second Edition, 19973. Significance and Use3.1 These terms have particular application to the forensicsciences. In addition, a hierarchy of sources of definitions wereused in the development of this terminology. The hierarchy isas follows: Websters New Collegia
10、te 7th Dictionary; technicaldictionaries; and the Compilation of ASTM Standard Defini-tions.8The subcommittee developed a suitable definition afterall of the sources in the hierarchy were found wanting.1This terminology is under the jurisdiction of ASTM Committee E30 onForensic Sciences and is the d
11、irect responsibility of Subcommittee E30.92 onTerminology.Current edition approved June 15, 2012. Published July 2012. Originallyapproved in 1995. Last previous edition approved in 2011 as E1732 11b. DOI:10.1520/E1732-12.2Any definition that is unsourced has been developed by ASTM SubcommitteeE30.92
12、.3Abbreviations are as follows: CRIM = criminalistics, QD = questioned docu-ments, ENGR = engineering, TOX = toxicology, PB = pathology/biology,ANTH = anthropology, and ODEN = odentology.4For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at servicea
13、stm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.5Withdrawn. The last approved version of this historical standard is referencedon www.astm.org.6Available from International Organization for Standardization (ISO), 1, ch. de
14、la Voie-Creuse, CP 56, CH-1211 Geneva 20, Switzerland, http:/www.iso.org.7Available from the International Association of Arson Investigators, Inc.(IAAI), 2111 Baldwin Avenue, Suite 203, Crofton, MD 21114, http:/.8ASTM Committee on Terminology, Compilation of ASTM Standard Defini-tions, 7th ed., Phi
15、ladelphia, PA: ASTM, 1990.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4. Terminology4.1 Definitions:accelerant, nany material used to initiate or promote thespread of a fire. The most common accelerants are flam-mable or combusti
16、ble liquids. Whether a substance is anaccelerant depends not on its chemical structure but on itsuse. IAAI Glossaryaccuracy, nthe closeness of agreement between a test resultand the accepted reference value. E177DISCUSSION(1) In practice, the accepted reference value is substituted for the truevalue
17、.(2) The term 9accuracy,9 when applied to a set of test or measurementresults, involves a combination of random components and a commonsystematic error or bias component.(3) Accuracy refers to a combination of trueness and precision.ISO 3534:1993(E/F)associative evidence, nthat evidence which tends
18、to link aperson, place, or thing with another person, place, or thing.calibration, nthe set of operations that establishes, underspecified conditions, the relationship between values indi-cated by a measuring instrument or measuring system orvalues represented by a material, and the correspondingkno
19、wn values of measurement.DISCUSSIONThis definition was originally defined in TerminologyE1187, a standard discontinued by ASTM.chain of custody, nprocedures and documents that accountfor the possession of a sample by tracking its handling andstorage from its point of collection to its final disposit
20、ion.class, na group, set or kind marked by common attributes ora common attribute. Websters Unabridged Dictionary9class characteristic(s), nthe attribute(s) that establish mem-bership in a class.classification, nthe systematic arrangement of persons orobjects into categories (groups or classes) base
21、d on sharedtraits or characteristics. Osterburg and Ward,10p. 835comparison sample, nfire debris,(1) a sample of materialcollected from a fire scene which is, to the best of theinvestigators knowledge, identical in every respect to asample suspected of containing ignitable substance, butwhich does n
22、ot contain ignitable substance; (2) a sample ofsuspected ignitable substance submitted for the purpose ofcomparing with any ignitable substance separated from adebris sample.control, nmaterial of established origin that is used toevaluate the performance of a test or comparison.criminalistics, na br
23、ance of forensic science concerned withthe examination and interpretation of physical evidence, forthe purpose of aiding forensic investigation.exemplar, na specimen of physical evidence of knownorigin. Osterburg and Ward,10p. 837expanded uncertainty (U), nquantity defining an intervalabout a result
24、 of a measurement that may be expected toencompass a large fraction of the distribution of values thatcould reasonably be attributed to the measurand.DISCUSSION(1) The fraction may be regarded as the coverage probability or levelof confidence of the interval.(2) To associate a specific level of conf
25、idence with the intervaldefined by the expanded uncertainty requires explicit or implicitassumptions regarding the probability distribution characterized by themeasurement result and its combined standard uncertainty. The level ofconfidence that may be attributed to this interval can be known only t
26、othe extent to which such assumptions can be justified.(3) An expanded uncertainty U is calculated from a combinedstandard uncertainty uc and coverage factor k using:U 5 k 3 ucISO GUM, EURACHEMfalse positive, na test result that states that a drug is presentwhen, in fact, such a drug is not present
27、in an amount greaterthan a threshold or designated cut-off concentration.known, nof established origin associated with the matterunder investigation.limit of detection, nthe lowest content that can be measuredwith reasonable statistical certainty.EURACHEMpopulation, nthe totality of items or units o
28、f material underconsideration.DISCUSSIONThe word “items” may be interpreted in the sense ofmeasurements, or possible measurements, of a single characteristic, oroccasionally for multiple characteristics, on all items or units ofmaterial being considered. The word “totality” may refer to items notava
29、ilable for inclusion in samples as well as those which are available.E456procedure, nspecified way to carry out an activity or aprocess.DISCUSSION(1) Procedures can be documented or not.(2) When a procedure is documented, the term “written procedure”or “documented procedure” is frequently used. The
30、document thatcontains a procedure can be called a “procedure document.”ISO 9000:2005(E)proficiency testing, nlaboratory, determination of labora-tory testing performance by means of interlaboratory testcomparisons. E1301qualitative analysis, nchemical, analysis in which sub-stances are identified or
31、 classified on the basis of theirchemical or physical properties, such as chemical reactivity,solubility, molecular weight, melting point, radiative prop-erties (emission, absorption), mass spectra, nuclear half-life,etc. (See also quantitative analysis.)IUPAC Terminologyquality assurance, nall the
32、planned and systematic activitiesimplemented within the quality system, and demonstrated asneeded, to provide adequate confidence that an entity willfulfill requirements for quality. ISO Guide 2quantitation limit, nthe minimum amount that can bequantitated with acceptable accuracy and precision. E21
33、619Websters Unabridged Dictionary, 1967, s.v. “class.”10Osterburg J.W., and Ward, R.H., Criminal Investigation: A Method forReconstructing the Past, Anderson Pub. Co.: Cincinnati, OH: 1992.E1732 122quantitative analysis, nchemical, analyses in which theamount or concentration of an analyte may be de
34、termined(estimated) and expressed as a numerical value in appropri-ate units. Qualitative analysis may take place without quan-titative analysis, but quantitative analysis requires the iden-tification (qualification) of the analytes for which numericalestimates are given. IUPAC Terminologyquestioned
35、, nassociated with the matter under investigationabout which there is some question, including, but notlimited to, whether the questioned and known items have acommon origin.recovery, nchemical, term used in analytical and preparativechemistry to denote the fraction of the total quantity of asubstan
36、ce recoverable following a chemical procedure.IUPAC Terminologyreference material, na material or substance, one or more ofwhose property values are sufficiently homogenous and wellestablished to be used for the calibration of an apparatus, theassessment of a measurement method, or for assigningvalu
37、es to materials. E1301repeatability, nprecision under repeatability conditions.E177, E456repeatability conditions, nconditions where independenttest results are obtained with the same method on identicaltest items in the same laboratory by the same operator usingthe same equipment within short inter
38、vals of time.E177, E456reproducibility, nprecision under reproducibility condi-tions. E177, E456reproducibility conditions, nconditions where test resultsare obtained with the same method on identical test items indifferent laboratories with different operators using differentequipment. E177, E456sa
39、mplea group of items, test results or portions of material,taken from a large collection of items, test results or portionsof material, which serves to provide information that may beused as a basis for making a decision concerning the largercollection. E456sampleone or more sampling units taken fro
40、m a popula-tion and intended to provide information on the population.ISO 3534:1993sampling, n(the) process of drawing or constituting asample. E1402, ISO 3534:1993selectivity, n(1)(qualitative): the extent to which othersubstances interfere with the determination of a substanceaccording to a given
41、procedure; (2)(quantitative): a termused in conjunction with another substantive (for example,constant, coefficient, index, factor, number) for the quanti-tative characterization of interferences. EURACHEM,IUPAC Terminologystandard, nmaterial of established origin with certifiedproperties.test, ndet
42、ermination of one or more characteristics accordingto a procedure. ISO 9000:2005(E)test method, na definitive procedure that produces a testresult. E456traceabilityproperty of a result of a measurement or value ofa standard whereby it can be related with a stated uncer-tainty, to stated references,
43、usually national or internationalstandards through an unbroken chain of comparisons.ISO Guide 30:1992(E/F)DISCUSSION(1) The concept is often expressed by the adjective traceable.(2) The unbroken chain of comparisons is called a traceability chain.(3) (Applicable only to the French text.)(4) Traceabi
44、lity of values in the certification of reference materialsfor chemical composition is discussed in IS0 Guide 35:1989 (subclause9.3.1) where attention is drawn to the special problems associated withchemical analysis. Traceability of the chemical species is frequently ofequal or greater importance th
45、an the traceability of the calibration of theinstruments used in the analysis.validation, nconfirmation, through the provision of objec-tive evidence, that the requirements for a specific intendeduse or application have been fulfilled.DISCUSSION(1) The term “validated” is used to designate the corre
46、spondingstatus.(2) The use conditions for validation can be real or simulated.ISO 9000:2005(E)verification, nconfirmation, through the provision of objec-tive evidence, that specified requirements have been ful-filled.DISCUSSION(1) The term “verified” is used to designate the corresponding status.(2
47、) Confirmation can comprise activities such as: performing alter-native calculations; comparing a new design specification with a similarproven design specification; and undertaking tests and demonstrations,and reviewing documents prior to issue. ISO 9000:2005(E)ASTM International takes no position
48、respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.Th
49、is standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shou
