NCJ Number
145536
Journal
Journal of the Forensic Science Society Volume: 33 Issue: 3 Dated: (July-September 1993) Pages: 159-164
Date Published
1993
Length
6 pages
Annotation
The accuracy of blood typing on preserved samples stored for various lengths of time was tested.
Abstract
Blood samples containing 2 and 4 percent sodium fluoride (preservative), were stored at 4 degrees centigrade. Stains were made--from blood alcohol samples after 12 to 147 days, and from laboratory-prepared samples within 4 weeks. ABO typing was successful on almost all the samples. Phosphoglucomatase (PGM) subtyping was successful on most samples, with clearer results from whole blood than from stains. Failure to type was slightly more common at the higher preservative level and meant no results rather than erroneous ones. Erythrocyte acid phosphatase (EAP) typing also was successful on most samples, with clearer results from whole blood than from stains. EAP results were not related to preservative level. These results were applied to two casework examples. 3 tables and 10 references