Problems of Forensic Sciences 1999 Vol. 40 (XL) 33-71
THE USE OF CHOSEN METHODS OF STATISTICAL AND CHEMOMETRIC ANALYSIS IN FORENSIC EXAMINATIONS OF GLASS
Grzegorz ZADORA1, Zuzanna BROŻEK-MUCHA2
1Faculty of Chemistry, The Jagiellonian University, Cracow
2The Institute of Forensic Research, Cracow
Streszczenie
Selected statistical and chemometric methods were applied in the interpretation of analytical data obtained during examinations of glass fragments by means of refractive index measurement and elemental analysis. Results of refractive index measurements with the use of a GRIM system were analysed using the "3 sigma" rule and Student's t-test. The elemental composition of the studied glass samples was determined by the SEM-EDX method and cluster analysis. An attempt was made to utilise selected statistical and chemometric methods both in order to classify an unknown glass sample into a use-type group of glass objects, and to discriminate between an evidential glass sample and a comparative glass sample.
Słowa kluczowe
SEM-EDX; GRIM; Forensic glass identification; Student's t-test; "3 sigma" rule; Cluster analysis.