Adli delil olarak kullanılan cam malzemelerin analitik yöntemlerle incelenmesi

Yıl 2025, Cilt: 15 Sayı: 1, 21 - 35, 15.03.2025

Yester Özmerinoğlu , Orhan Destanoğlu , Salih Cengiz

Öz

Hırsızlık, vur-kaç gibi farklı adli vakalarda toplanan cam malzeme delillerinin fiziksel, kimyasal, mekanik ve optik özellikleri göz önünde bulundurularak karakterizasyonun yapılması adli olayların çözümünde önemli bir yer tutmaktadır. Bu çalışmada farklı tipte cam malzemelerin elementel analiz sonuçlarına bağlı olarak istatistiksel farklılandırılması amaçlanmıştır. Cam örneklerinin X-ışını floresan spektrometresi (XRF) ile Alüminyum, Demir, Titanyum, Kalsiyum, Magnezyum, Sodyum, Potasyum, Kükürt, Baryum ve Krom elementleri analiz edilmiştir. Bu örneklerden 27 tanesinin ise lazer ablasyon indüktif eşleşmiş plazma kütle spektrometresi (LA-ICP-MS) ile Alüminyum, Demir, Titanyum, Kalsiyum, Magnezyum, Sodyum, Potasyum, Kükürt, Baryum, Arsenik, Kobalt, Nikel, Rubidyum, Stronsiyum ve Kurşun elementleri analizlenmiştir. Cam numunelerinin sınıflandırılmasında Temel Bileşenler Analizi (TBA-PCA) yöntemi kullanılmıştır. Deneysel analizler sonucunda, tek bir elemente dayalı farklılaştırmadan ziyade birden fazla elementin birlikte değerlendirilmesiyle cam örneklerinde güvenilir bir tanımlama ve farklılaştırma yapılabileceği görülmüştür. Ayrıca yapılan istatistiksel yöntem değerlendirmesi sonucunda 3-boyutlu temel bileşen analizi uygulandığında cam örnekleri arasındaki sınıf ayrımının daha yüksek skorla yapılabildiği görülmüştür.

Anahtar Kelimeler

Cam malzeme, Elementel analiz, Mikro analiz, Temel bileşenler analizi

Examination of glass materials used as forensic evidence with analytical methods

Öz

The characterization of glass material evidence collected in different forensic cases such as burglary, hit-and-run, etc. by considering their physical, chemical, mechanical and optical properties has an important place in the solution of forensic cases. In this study, statistical differentiation of different types of glass materials based on elemental analysis results was aimed. Aluminum, Iron, Titanium, Calcium, Magnesium, Sodium, Potassium, Potassium, Sulfur, Barium and Chromium elements were analyzed by X-ray fluorescence spectrometry (XRF). In 27 of these samples, the elements Aluminum, Iron, Titanium, Calcium, Magnesium, Sodium, Potassium, Sodium, Potassium, Sulfur, Barium, Arsenic, Cobalt, Nickel, Rubidium, Strontium and Lead were analyzed by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). Principal Component Analysis (PCA) method was used to classify the glass samples. As a result of the experimental analysis, it was seen that a reliable identification and differentiation can be made in glass samples by evaluating multiple elements together rather than differentiation based on a single element. Additionally, as a result of the statistical method evaluation, it was seen that class distinction between glass samples could be made with a higher score when 3-dimensional principal component analysis was applied.

Anahtar Kelimeler

Glass material, Elemental analysis, Micro analysis, Principal component analysis

Kaynakça

• Almirall, J., Trejos, T. & Lambert, K. (2020). Interpol review of glass and paint evidence 2016-2019, Forensic Science International: Synergy, 2, 404–415. https://doi.org/10.1016/j.fsisyn.2020.01.010
• Aydın, E. (2012). Cam Üretiminde Sorunlu Alanlar, 1. Baskı, İstanbul, Türkiye İş Bankası Kültür Yayınları
• Bajic, S.J., Aeschliman, D.B., Saetveit, J.N., Baldwin, D. P. & Houk, R. S. (2005). Analysis of Glass Fragments by Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry and Principal Component Analysis, Journal of Forensic Sciences, 50 (5), 1123-1127.
• Bell, S. C. & Nawrocki, H. D. & Morris, K. B. (2009). Forensic discrimination of glass using cathodoluminescence and CIE LAB color coordinates: a feasibility study, Forensic Science International, 189, 93–99. https://doi.org/10.1016/j.forsciint.2009.04.023
• Buscaglia, J. (1994). Elemental analysis of small glass fragments in forensic science, Analitic Chimica Acta, 288, 17-24.
• Caddy, B. (2001) Forensic Examination of Glass and Paint (1. Baskı), Taylor & Francis, https://doi.org/10.1201/9780203483589
• Çakır, İ. (2003). Enerji dağılımlı x-ışını analizörlü taramalı elektron mikroskobu (SEM-EDS) ile sıkça karşılaşılan katı adli delillerin incelenmesi, [Doktora Tezi, İstanbul Üniversitesi Adli Tıp Enstitüsü].
• Corzo, R., Hoffman, T., Ernst, T., Weis, P., Stryjnik, A., Dorn, H., Pollock, E., Workman, S. M., Jones, P., Nytes, B., Scholz, T., Huifang, X., Igowsky, K., Nelson, R., Gates, K., Gonzalez, J., Voss, L.M. & Almirall, J. (2021). An interlaboratory study evaluating the interpretation of forensic glass evidence using refractive index measurements and elemental composition, Forensic Chemistry, 22, 100307. https://doi.org/10.1016/j.forc.2021.100307
• Destanoğlu, O. (2022). Discrimination and authentication of geographical origin of Turkish Taşköprü garlic by investigating volatile organosulfur compound profiles and multivariate analyses, Turkish Journal of Chemistry, 46 (4), 1152-1163. doi:10.55730/1300-0527.3423
• Doğan, N. (1996). Sodalı camların elektromanyetik radyasyon karşısındaki davranışı, [Yüksek Lisans Tezi, İstanbul Teknik Üniversitesi Nükleer Enerji Enstitüsü].
• Doremus, R. H. (1994). Glass science, (2nd edt). , A Wiley-Interscience Publication.
• Grieve, M.C., Dunlop, J. & Haddock, P. (1988). An assessment of the value of blue, red, and black cotton fibers in forensic science investigations, Journal of Forensic Sciences, 33, 1332–1344. doı:10.1520/JFS12577J
• Hammond, D.L. (2007). Validation of LAB color mode as a nondestructive method to differentiate black ballpoint pen inks, Journal of Forensic Sciences, 52(4), 967–973. doi: 10.1111/j.1556-4029.2007.00469.x
• Hicks, T., Monard Sermier, F., T Goldmann, T., Brunelle, A., Champod, C. & Margot, P. (2003), The classification and discrimination of glass fragments using non destructive energy dispersive X-ray μfluorescence, Forensic Science International, 137 (2-3), 107-118. https://doi.org/10.1016/S0379-0738(03)00278-0
• Hoffman, T., Corzo, R., Weis, P., Pollock, E., Es, A., Wiarda, W., Stryjnik, A., Dorn, H., Heydon, A., Hoise, E., Franc, S., Huifang, X., Pena, B., Scholz, T., Gonzalez, J. & Almirall, J. (2018). An inter-laboratory evaluation of LA-ICP-MS analysis of glass and the use of a database for the interpretation of glass evidence, Forensic Chemistry, 11, 65-76. https://doi.org/10.1016/j.forc.2018.10.00
• Maeo, S., Sakai. I., Kuzushita, K. & Taniguchi K. (2007). Development of micro X-ray fluorescence spectrometer with multi excitation sources, Spectrochimica Acta Part B, 62, 562-566
• Martinez-Lopez, C., Ovide, O., Corzo, R., Andrews, Z., Almirall, J. & Trejos, T. (2022). Homogeneity assessment of the elemental composition of windshield glass by µ-XRF, LIBS and LA-ICP-MS analysis, Forensic Chemistry, 27, 100384. https://doi.org/10.1016/j.forc.2021.100384
• O’Sullivana, S., T. Geddesb, T. & Lovelockb, J. (2011). The migration of fragments of glass from the pockets to the surfaces of clothing, Forensic Science International, 208 (1-3), 149-155. https://doi.org/10.1016/j.forsciint.2010.11.020
• Özmerinoğlu, Y. (2008). Adli olaylarda karşılaşılabilecek cam örneklerinin mikroanalitik yöntemler kullanılarak tanımlanması ve farklılandırılması, [Yüksek Lisans Tezi, İstanbul Üniversitesi Adli Tıp Enstitüsü].
• Saferstein, R. (2004). Criminalistics: an introduction to forensic science, (8th ed.). Pearson Prentice Hall.
• Suzuki, Y., Sugita, R., Suzuki, S. & Maruma, Y. (2000). Forensic Discrimination of Bottle Glass by Refractive Index Measument and Analysis of Trace Elements with ICP-MS, Analytical Sciences, (16), 1195-1198.
• Suzuki, Y., Kasamatsu, M., Suzuki, S., Nakanishi, T., Takatsu, M., Muratsu, S., Shimoda, O.,Watanabe, S., Nishiwaki, Y. & Miyamoto, N. (2005). Forensic discrimination of sheet glass by a refractive-index measurement and elemental analysis with synchrotron radiation x-ray spectrometry, Ananlytical Science, 21(7), 855-859. doi: 10.2116/analsci.21.855
• Trejos, T., Koons, R., Becker, S., Palenik, C., Berman, T., Buscaglia, J., Duecking, M., Eckert-Lumsdon, T., Ernst, T., Hanlon, C., Heydon, A., Mooney, K., Nelson, R., Olsson, K., Palenik, C., Pollock, E., Rudell, D., Ryland, S., Tarifa, A., Valadez, M., Weis, P. & Almirall, J. (2013). Cross-validation and evaluation of the performance of methods for the elemental analysis of forensic glass by μ-XRF, ICP-MS, and LA-ICP-MS, Anal Bioanal Chem, 405, 5393-5409. doi: 10.1007/s00216-013-6978-y
• Ustaer, C. (1995). Cam bilimi’ne giriş, 1. Baskı, I.Cilt. İstanbul Üniversitesi Teknik Bilimler Meslek Yüksek Okulu.
• Yatsuka, O., Kochb, L., Giannossac, L.C., Annarosa Mangone, A., Fioccoe, G., Malagodie, M., Gorghiniang, A., Ferrettih, M., Davita, P., Cristiano Iaiai, C. & Monica Gulminia, M. (2024). Back to black: Analysis of the earliest natron glass found in Italy, Journal of Archaeological Science (57). DOI: 10.1016/j.jasrep.2024.104648
• Zadora, G. (2001). Examination of the refractive index of selected samples of glass for forensic purposes, Problems of Forensic Sciences, 45, 36-51.
• Zadora, G. (2009). Classification of glass fragments based on elemental composition and refractive index, Journal of Forensic Sciences, 54(1), 49-59. doi: 10.1111/j.1556-4029.2008.00905.x