Download presentation
Presentation is loading. Please wait.
Published byBathsheba Russell Modified over 9 years ago
1
Training of chemistry students in the Institute of Forensic Research Janina Zięba-Palus
2
Lecture: „Chemistry in criminslistics” – 30 h „Forensic Toxicology” - 30 h Laboratory courses (each 5 h) examination of paint fibres identifacation examination of glass GSR examination examination of ink drugs inorganic poisons Seminar (1 h) - before each laboratory taining Forensic Chemistry
3
Participants: students of chemistry (4th year of study) group consist of 12 - 14 people during lab training students are divided into two groups performing practical exercises using analytical equipment (microscopes, spectrometers) and preparing reports basing on the obtained results they elaborate „mini projects”- research and literature study in the field of forensic chemistry – 4 th year, II semester
4
they elaborate master thesis during two semesters - 5 th year: - on identification of car paints by the use of IR, SEM/EDX, Py-GC/MS or Vis spectrometry - on examination of GSR by the use of SEM/EDX - on differentiation of glass fragments using SEM/EDX, RI - on identification of fibres using optical microscopy - on organic and inorganic poisons identification summer practice is performed – two weeks sometimes they are employed within research project financed by Polish government and EU
5
Moreover, students of Strathclyde University (Glasgow) prepare their master thesis – 3 months students from Fachschule in Instein (Germany) – practical training during 5 months
6
Paints
7
Optical microscopy: - morphology - layer structure - colour - pigments
8
IR spectroscopy –SEM/EDX
9
IR spectroscopy chemical content of each layer
10
Fibres
11
Optical microscopy, SEM - morphology
12
Vis spectroscopy comparison of fibre colour
13
IR spectroscopy identification of polymer (type of fibre)
14
Glass
15
Grim 2
16
RI measurement
17
SEM/EDX – quantitative elemental analysis in order to classify and compare of glass fragments using chemometric methods
18
GSR
19
Metal particles
20
Metal particles: - spherical shape - several microns in diameter - specific composition SEM/EDX
21
Inks
22
absorption in white light absorption in IR light VSC
23
Raman spectroscopy
24
Extraction solution Pyridine 1. Isolation of writing materials from paper Three types of elution solutions Butanol : ethanol : Distilled water : acetic acid Ethyl acetate : ethanol : distilled water Ethyl acetate : propanol : distilled water : acetic acid 2. Developing of chromatograms Observation of chromatograms in UV/VIS light 3. Interpretation of chromatograms
25
black ink acid blue blue gel glicerine styrene IR spectroscopy
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.