Forensic Science and Technology (ISSN:1008-3650)

Fingerprints play an extremely important role in criminal investigation and forensic identification. Carbon dots have a broad application in the field of fingerprint development, due to their excellent fluorescence properties, stable chemical properties and low cost. In this paper, we demonstrated the fluorescence mechanism of carbon dots fingerprint development technology and analyzed two coping strategies to improve the aggregation quenching effect of solid carbon dots powder. Compared with changing the structure of carbon dots or surface modification methods, it is more convenient and st

The DNATyper mtDNA-SNP60™ kit is a mtDNA SNP multiplex amplification system, which is suitable for the Chinese population. At present, the DNATyper mtDNA-SNP60™ kit has not been officially launched on the market. There has been no systematic research on the application of the DNATyper mtDNA-SNP60™ kit in practical cases. To explore the feasibility of the application of DNATyper mtDNA-SNP60™ kit in forensic DNA casework, DNATyper mtDNA-SNP60™ kit was used to test the mtDNA SNP of 100 unrelated individuals of Han nationality and 20 groups of whole siblings. 25 pg

By analyzing and studying the hair samples that contain methamphetamine, the paper aims to explore the optimal pretreatment conditions when determining methamphetamine in hair using liquid chromatography-tandem mass spectrometry (LC-MS/MS). Different cleaning, grinding, and extraction conditions were compared to optimize the pretreatment method. Retention time, characteristic ion pairs and their relative abundance were used for qualitative determination. The peak area of characteristic ion pairs was used for quantification. The results showed that the concentration of methamphetamine in hai

Mycotoxins are secondary metabolites produced by phytopathogenic fungi under specific conditions. They are widely distributed in crops, and are chemically stable and highly toxic. In criminal cases, the detection of mycotoxins in biological samples can provide more accurate forensic evidence; therefore, the detection of mycotoxins in biological samples has gained great attention. In this study, common mycotoxins and their metabolites in biological samples are introduced, and pretreatment methods, such as liquid-liquid extraction, solid-phase extraction, and protein precipitation, are summar

An analytical method was established for determination of 5 common veterinary anesthetics (tiletamine, xylazole, ketamine, xylazine and zolazepam) in whole blood by using programmed temperature vaporizer (PTV) system combined GC-MS/MS. Those samples were dealt with salting-out-assisted liquid-liquid extraction (SALLE), introducing NaCl as salting-out regent and acetonitrile as extraction solvent. After that, the extracting solution was purified by QuEChERS nano column. Most acetonitrile in the solution were removed by PTV system before analyzing in GC-MS/MS for protection of gas chromatogra