TY - JOUR
T1 - Dating bloodstains with fluorescence lifetime measurements
AU - Guo, Kevin
AU - Achilefu, Samuel
AU - Berezin, Mikhail Y.
PY - 2012/1/27
Y1 - 2012/1/27
N2 - In summary, fluorescence lifetime was shown to be a promising technique to evaluate the age of a bloodstain in a crime scene within the first week. The method is fast (ca. 20 min), reproducible, concentration independent, and requires a miniscule amount of the bloodstain with minimal sample preparation. The major improvement of the technique will come from the development of the lifetime imaging technique, in which the average fluorescence lifetime is evaluated across the region of interest in the bloodstain. Such an approach will minimize the problems with sampling and provide more accurate results. The measurements can potentially be performed in solid state by using a handheld fluorescence-lifetime instrument, which could be applied to the bloodstain directly at the crime scene with no additional sample handling.
AB - In summary, fluorescence lifetime was shown to be a promising technique to evaluate the age of a bloodstain in a crime scene within the first week. The method is fast (ca. 20 min), reproducible, concentration independent, and requires a miniscule amount of the bloodstain with minimal sample preparation. The major improvement of the technique will come from the development of the lifetime imaging technique, in which the average fluorescence lifetime is evaluated across the region of interest in the bloodstain. Such an approach will minimize the problems with sampling and provide more accurate results. The measurements can potentially be performed in solid state by using a handheld fluorescence-lifetime instrument, which could be applied to the bloodstain directly at the crime scene with no additional sample handling.
KW - Bloodstain age
KW - Fluorescence lifetime
KW - Forensics
KW - Tryptophan
UR - http://www.scopus.com/inward/record.url?scp=84857172303&partnerID=8YFLogxK
U2 - 10.1002/chem.201102935
DO - 10.1002/chem.201102935
M3 - Article
C2 - 22238188
AN - SCOPUS:84857172303
SN - 0947-6539
VL - 18
SP - 1303
EP - 1305
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
IS - 5
ER -