Preliminary investigation of heroin fingerprinting using trace element concentrations

Autor:	P. T. Crisp, A. Ekangaki, S. V. Skopec, Z. Skopec, James Robertson, R. Iavetz, R. B. Myors, Robert J. Wells
Rok vydání:	1998
Předmět:	Chemistry Principal component analysis Trace element Analytical chemistry Mineralogy Trace analysis South east asian Mass spectrometry Predictive value Inductively coupled plasma mass spectrometry Analytical Chemistry Hierarchical clustering
Zdroj:	Analytical Communications. 35:403-410
ISSN:	1364-5536 1359-7337
DOI:	10.1039/a808802k
Popis:	Heroin samples [76 South East Asian (SEA), 20 non-South East Asian (non-SEA) and 92 of uncertain origin] were analysed by inductively coupled plasma mass spectrometry for 73 elements. Hierarchical cluster analysis (HCA) grouped together the SEA and many of the non-SEA sub-groups, and grouped together elements with similar chemical properties. K-means cluster, correlation and principal component analyses supported the HCA. Logistic models were created using continuous, discrete and a combination of continuous and discrete elemental data in order to predict the SEA or non-SEA origin of samples. The predictive values of the models were 68–100%, the most successful models simultaneously using both continuous and discrete concentration data.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3982839870fd00542fef88f0f068c7ff https://doi.org/10.1039/a808802k Zobrazit plný text záznamu