PMID- 30762099
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20190709
IS  - 1618-2650 (Electronic)
IS  - 1618-2642 (Linking)
VI  - 411
IP  - 19
DP  - 2019 Jul
TI  - Classifying single fibers based on fluorinated surface treatments.
PG  - 4775-4784
LID - 10.1007/s00216-019-01596-6 [doi]
AB  - Fibers are an important form of forensic evidence, but their evidential value can 
      be severely limited when the identified characteristics of the fibers are common, 
      such as blue cotton. Detecting chemical fiber treatments offers an avenue to 
      further classify fibers and to improve their evidential value. In this report, we 
      investigate the potential of fluoropolymer fiber coatings, used to impart oil and 
      water-repellent properties in fabrics, for differentiating between fibers. The 
      thin nature of these fiber surface modifications creates an analytical challenge 
      for their detection on a single fiber, a typical sample size for forensic 
      evidence. Specifically, pyrolysis-gas chromatography-mass spectrometry (py-GC-MS) 
      has shown promising selectivity but the sensitivity of the method is not adequate 
      for single-fiber analysis of fluorinated coatings. To overcome this challenge, we 
      utilize a newly developed elemental ionization source, plasma-assisted reaction 
      chemical ionization (PARCI). The high sensitivity of py-GC-PARCI-MS for elemental 
      fluorine analysis offers selective and sensitive detection of fluorinated 
      pyrolysates among the non-fluorinated pyrolysates of the fiber core. As a result, 
      fluoropolymer coatings are detected from 10-mm single-fiber samples. The 
      technique is applied for classification of 22 fiber types, resulting in 4 
      distinct groups via hierarchical cluster analysis based on similarity of fluorine 
      pyrograms. These results present the first study to classify fibers based on 
      fluorinated coatings, and highlight the potential of py-GC-PARCI-MS for forensic 
      analyses. Graphical Abstract ᅟ.
FAU - Dolan, Michael J Jr
AU  - Dolan MJ Jr
AD  - Department of Chemistry, Georgetown University, Washington, DC, USA.
FAU - Blackledge, Robert D
AU  - Blackledge RD
AD  - , San Diego, USA.
FAU - Jorabchi, Kaveh
AU  - Jorabchi K
AD  - Department of Chemistry, Georgetown University, Washington, DC, USA. 
      kj256@georgetown.edu.
LA  - eng
GR  - 2017-R2-CX-0007/National Institute of Justice/
PT  - Journal Article
DEP - 20190214
PL  - Germany
TA  - Anal Bioanal Chem
JT  - Analytical and bioanalytical chemistry
JID - 101134327
OTO - NOTNLM
OT  - Elemental mass spectrometry
OT  - Fiber coating
OT  - Fluorine
OT  - Forensic
EDAT- 2019/02/15 06:00
MHDA- 2019/02/15 06:01
CRDT- 2019/02/15 06:00
PHST- 2018/11/15 00:00 [received]
PHST- 2019/01/09 00:00 [accepted]
PHST- 2019/01/04 00:00 [revised]
PHST- 2019/02/15 06:00 [pubmed]
PHST- 2019/02/15 06:01 [medline]
PHST- 2019/02/15 06:00 [entrez]
AID - 10.1007/s00216-019-01596-6 [pii]
AID - 10.1007/s00216-019-01596-6 [doi]
PST - ppublish
SO  - Anal Bioanal Chem. 2019 Jul;411(19):4775-4784. doi: 10.1007/s00216-019-01596-6. 
      Epub 2019 Feb 14.