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Imágenes químicas de huellas dactilares latentes mediante espectrometría de masas

Demian R Ifa¹, Nicholas E Manicke, Allison L Dill

¹Department of Chemistry and Center for Analytical Instrumentation Development, Purdue University, West Lafayette, IN 47907, USA.

Science (New York, N.Y.)

|August 9, 2008

Resumen

Las huellas dactilares latentes revelan algo más que la identidad, ofreciendo información química sobre explosivos y exposición a drogas. La espectrometría de masas por imágenes captura estas huellas químicas específicas del compuesto para un análisis forense avanzado.

Área de la Ciencia:

Ciencias Forenses Ciencias Forenses.
Química analítica Química analítica es la que
La bioquímica es la bioquímica.

Sus antecedentes:

Las huellas dactilares latentes (LFP) ofrecen un potencial forense significativo más allá de la identificación del sujeto.
Los LFP pueden contener rastros químicos de explosivos y sustancias ilícitas.
El análisis químico ayuda a resolver escenarios forenses complejos, como la superposición de huellas dactilares.

Objetivo del estudio:

Explorar la utilidad de la espectrometría de masas avanzada para el análisis químico de LFPs.
Demostrar la capacidad de capturar información química específica del compuesto de las LFP.
Para mejorar el valor forense de LFPs a través de huellas dactilares químicas.

Principales métodos:

Se utilizó la espectrometría de masas de ionización por electrospray de desorción (DESI-MS).
Empleado DESI-MS en un modo de imagen para el análisis químico espacial.
Huellas dactilares químicas registradas específicas del compuesto a partir de residuos de huellas dactilares latentes.

Principales resultados:

Adquisición exitosa de información química de LFPs utilizando DESI-MS.
Demostró la capacidad de generar huellas dactilares químicas específicas de los compuestos.
Mostró el potencial para diferenciar a los individuos en función de los perfiles químicos de LFP.

Conclusiones:

La espectrometría de masas de ionización por electrospray de desorción es una herramienta poderosa para el análisis químico de LFPs.
Las huellas químicas de LFPs proporcionan inteligencia forense adicional.
Esta técnica puede mejorar la resolución de la superposición de huellas dactilares latentes e identificar sustancias traza.

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