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Forensic Science can be defined in organisational terms or in terms of disciplines involved or terms of the justice process. Together these different definitions give an understanding of the special requirements that must be met of those involved in Forensic Science. Forensic Science often combines objective measurements with subjective interpretation. Often a qualitative result is sufficient for the purpose of the investigation. Lately the emphasis in several countries has been changed from an effort to seek for the truth into a comparison of the different hypotheses that are actual in a certain case.
The measurement methods employed by the forensic laboratories are relatively standardised and dominated by instruments developed for all-purpose chemical analysis or specially for the forensic appliance. Since a lot of the analyses deal with large molecules transport separation methods are predominant in combination with different sensors. However in certain cases use is made of any measurement method often in co-operation with university scientists.
Some illustrative examples will be shown to exemplify some of the measurements methods used in Swedish Forensic Science.