In forensic investigations, hair formations are used to determine the acute and / or chronic use of drugs and drugs of abuse, with the possibility of retrospective investigation. With the increase in drug consumption and the consequent increase in requests for analysis, both in the medico-legal and clinical fields (fitness to drive, to work, to carry arms, to transplant), the Toxicology laboratory needs to process an increasing number of samples in a short time, for an increasing number of analytes. The use of an all-encompassing method was therefore proposed for the preparation and analysis for different classes of substances (basic, acidic, neutral) and / or metabolites in hair. The goal was to optimize the time, the consumption of reagents, the amount of sample needed for the analysis. In this way, even if the sample is scarce, as is often the case for pediatric patients, several analyses can be performed with a very limited amount of sample and time. The method was validated with Xevo TQ-S micro UHPLC-MS / MS instrumentation, with high sensitivity and specificity. Validation parameters were evaluated that demonstrated the reliability and adequacy of the method for the purpose. The various tests performed demonstrated the concordance of the results between the previously used method and the one just validated.
Nelle indagini forensi le formazioni pilifere (capelli, peli) vengono utilizzati per determinare l’uso acuto e/o cronico di sostanze stupefacenti e farmaci, con possibilità di indagine retrospettiva. Con l’aumento del consumo di droghe e conseguente aumento delle richieste di analisi sia in ambito medico-legale che clinico (idoneità alla guida, al lavoro, al porto d’armi, al trapianto), il laboratorio di Tossicologia ha la necessità di processare un numero sempre maggiore di campioni in breve tempo, per un sempre maggior numero di analiti. Si è quindi proposto l’uso di una metodica omnicomprensiva per la preparazione e l’analisi delle formazioni pilifere per diverse classi di sostanze (basiche, acide, neutre) e/o metaboliti. L’obiettivo era di ottimizzare i tempi, il consumo di reagenti, la quantità di campione necessari per l’analisi. In questo modo anche se il campione è scarso, come accade spesso per i pazienti pediatrici, si possono eseguire diverse analisi con una quantità molto limitata di campione. Il metodo è stato validato con strumentazione UHPLC-MS/MS Xevo TQ-S micro, dotato di alta sensibilità e specificità. Sono stati valutati diversi parametri che hanno dimostrato l’affidabilità e l’adeguatezza della metodica allo scopo. I diversi test eseguiti hanno dimostrato la concordanza dei risultati tra la metodica precedentemente in uso e quella appena validata.
Validazione di un metodo di estrazione simultanea di sostanze stupefacienti, farmaci e metaboliti in matrici cheratiniche
CASA, AURORA
2021/2022
Abstract
In forensic investigations, hair formations are used to determine the acute and / or chronic use of drugs and drugs of abuse, with the possibility of retrospective investigation. With the increase in drug consumption and the consequent increase in requests for analysis, both in the medico-legal and clinical fields (fitness to drive, to work, to carry arms, to transplant), the Toxicology laboratory needs to process an increasing number of samples in a short time, for an increasing number of analytes. The use of an all-encompassing method was therefore proposed for the preparation and analysis for different classes of substances (basic, acidic, neutral) and / or metabolites in hair. The goal was to optimize the time, the consumption of reagents, the amount of sample needed for the analysis. In this way, even if the sample is scarce, as is often the case for pediatric patients, several analyses can be performed with a very limited amount of sample and time. The method was validated with Xevo TQ-S micro UHPLC-MS / MS instrumentation, with high sensitivity and specificity. Validation parameters were evaluated that demonstrated the reliability and adequacy of the method for the purpose. The various tests performed demonstrated the concordance of the results between the previously used method and the one just validated.File | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12608/36263