In 1247, Song Ci, a Chinese medicolegist, wrote the first monograph for modern forensics called Collected Cases of Injustice Rectified. The main aim of Song Ci was to preserve human life, and the “rectified injustices” cited in the title implies to proving the innocence of those individuals who have been wrongly pronounced as guilty.
In current judicial proceedings, medical technologies are frequently being used by forensic investigators to inspect the bodies of corpses and other substances that may be connected with the legal cases.
In the case of poison-related mortalities, for example, forensic investigators have to find out whether poison was the cause of death, what type of poison it is, and the amount of poison present in the body. Therefore, a detailed investigation has to be performed, and precise and accurate identifications are believed to be provided to these questions later on.
In one municipal Public Security Bureau of Fujian Province, the role of the Technical Group of Criminal Investigation Department is to identify and analyze different suspicious material evidence related to the city’s criminal cases. Primarily focusing on the investigation for death or personal injury cases, as well as the detection of forensic material proof, such as hair, skeleton, bloodstains, toxics, seminal stain and so on.
An assorted range of unusual materials are examined by forensic investigators, who identify all types of miscellaneous suspicious materials collected from the crime scene. These materials may include anything — bodily fluids like urine and blood, residual substances left at the scene of the crime like vomit, litter, excrement, internal organs, fingernails, hair, and remains connected with buried decaying corpses including soil and coffins.
According to most of the forensic investigators, today’s analytical instruments are already technologically advanced, and afford a high level of accuracy, sensitivity, and detection ability, and most of the work conducted in the labs is in fact spent in sample pre-treatment.
Mr. Huang, a forensic investigator at the Technical Group of Criminal Investigation Department in the municipal Public Security Bureau of Fujian Province, stated that, “We are confronted with two major problems: 1) how to improve the processing efficiency among variously numerous of samples, and 2) how to reduce the chance of cross-contamination between samples. IKA® resolves a most important problem in forensic identification field, and we appreciate it a lot.”
The solution - Disposable Tube, World-First Dispersing Technology
IKA® provided a UTTD control tube disperser to a customer, which helped resolve these two major issues. For instance, in Acute Organic Phosphorus Poisoning (AOPP) cases, forensic investigators have to gather and examine substances that are associated with the hophead, such as container of the pesticide, his/her leftover, vomit, drinks, gastric juice, urine, blood, lung, kidney, liver, and so on.
Among the many different samples, the organic solvent extraction method can be used to collect solid and semisolid samples for analysis, but before this is done the lung, kidney, and liver have to be homogenized. The IKA® UTTD control provides several benefits in this type of application, which can be summed up as follows:
- IKA® UTTD control with 50 ml dispersing tube can complete the homogenization of a single sample in just 1 to 2 minutes; with the help of the 50 ml dispersing tube, 3 to 5 g of kidney, liver, and lung tissues can be processed. A wide range of samples can be processed separately at the same time, considerably improving the efficiency of processing as opposed to conventional manual grinding.
- Viscera samples contain high amounts of connective tissue and fibers. The IKA® UTTD control comes with a unique reverse function that can easily overcome the issues of connective tissue and fibers that wind along the dispersing elements.
- Turbo key is provided which can immediately increase the speed of dispersing elements to 8000rpm. This significantly improves the dispersing efficiency and allows rapid sample homogenization.
- Disposable tubes are also employed. During grinding, the samples are individually processed so that any possible cross-contamination that may occur on a usual disperser after repeated use can be prevented.
- For future reference or analysis, the ground samples can be kept in the same tubes at a temperature of 4°C.
The Benefit to the Customer
Avoiding cross-contamination during sample processing is the ultimate requirement when processing forensic toxic samples. The IKA® UTTD control is designed to meet this need and thus enhance the processing efficiency. According to officer Huang, “IKA® resolves a most important problem in forensic identification field, and we appreciate it a lot.”
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