For those interested in hand-held XRF instruments, please note a recent
users survey published at the Instrument Business Outlook magazine (Vol. 19,
No. 20, January 2011).
If anyone is interested in this survey - please contact me off-list and I'll
send you the article.
Regards,
Nadav
2011/4/8 peter bush <pjbush@buffalo.edu>
>
>
> Hi All
>
> As Frank notes below, we have been using a handheld XRF for about 6 yrs. It
> is a tremendously versatile and useful gadget for a lot of situations. We
> have analyzed As levels in taxidermy, Pb levels in Chinese toys, As leaching
> from pressure treated lumber, Pb and Sr in bone, unknown metals, jewelry,
> outdoor sculptures (fake), historical gun alloy sources, GSR at fired
> distances etc.
>
> We created a spectral database of dental materials and published a
> validation study in which 6 cremated cadavers were ID based on tooth colored
> filling brands. (I'll send a copy if you email me off group).
>
> The most interesting was resolution of a 6yr cold murder case. Trace levels
> of four elements found in the cinder block tied around the victims neck were
> compared to a cinder block found in the suspects back yard (and a collection
> of other cinder blocks). The two blocks 'matched'. When confronted with the
> data, the killer confessed.
>
> Any questions, send me an email.
> Best, Peter
>
>
>
> On 4/8/11 7:48 AM, Platek, Frank wrote:
>
>
>
> Hello Nadav and all,
>
> We have recently acquired several handheld XRF devices, both "true"
> handheld and *very* mobile/portable field *and* lab use instruments from
> several vendors. Currently, we are learning to use them as screening tools
> but that work has just started. I have been given the lead on this effort
> and as we develop our methods, levels of confidence and experience, I'll be
> glad to share that information. If you plan to use these devices as
> confirmation of the elemental content of metals and alloy stock (such as
> foundry and fabrication work) they appear to work rather well. The ability
> to examine a single suspect "fragment" for anything more than major
> elemental composition will require confirmation analyses. You should know
> that there are also manipulations of filters, vacuum modes, accelerating
> voltages, detector current and analysis programs between the vendors to be
> able to perform qualitative and quantitative elemental analyses.
>
> Peter and Mary Bush (list members) have used handheld devices in the
> analysis of dental materials and comparisons to victim dental records with
> great success. They have presented several papers in the Forensic Sessions
> at SCANNING. I'm sure Peter will be glad to provide more information
> and citations. *To my knowledge*, Peter and Mary have the most
> extensive experience to date with forensic applications of handheld XRF
> devices. I'm confident there are others on this list with extensive
> experience and it will be good to have their comments.
>
> Best regards to all
>
> Frank
>
>
> *S. Frank Platek, MS***
> *Research Biologist, Trace Examination Section *
> *Organic Chemistry Branch*
> *US FDA - Forensic Chemistry Center*
> *6751 Steger Drive*
> *Cincinnati, Ohio 45237-3097*
> *(513) 679-2700 X254*
> *(513) 679-2761 FAX*
> *frank.platek@fda.hhs.gov* <frank.platek@fda.hhs.gov>
>
> *This email may contain information or data that is considered privileged
> and confidential specifically for the addressed person(s) only. If you are
> not the intended recipient, any dissemination or copying is strictly
> prohibited. If you have received this email in error, please destroy the
> document and notify the sender. Any opinions and comments noted are those
> of the author and do not necessarily represent those of the US Food and Drug
> Administration or any other Federal Agency.*
>
>
>
> ------------------------------
> *From:* Forensic_SEM@yahoogroups.com [mailto:Forensic_SEM@yahoogroups.com<Forensic_SEM@yahoogroups.com>]
> *On Behalf Of *Nadav Levin
> *Sent:* Friday, April 08, 2011 4:40 AM
> *To:* Forensic_SEM@yahoogroups.com; forensic-science@yahoogroups.com
> *Cc:* Nadav Levin
> *Subject:* [Forensic_SEM] Forensic Science Applications of Hand-held XRF
> Instruments
>
>
>
> Dear Colleagues,
> About 7 year ago the attached message was posted on the Forensic Science
> Yahoo Group, with no replies.
> Since then, several ideas regarding the application of hand-held XRF
> instruments were proposed.
> Does anyone use, or is aware of, forensic science applications of such
> systems in casework ?
> Thanks, and best regards,
> Nadav Levin
> DIFS
> Isarel
>
>
> --- In forensic-science@yahoogroups.com, "spartantroy" <ernstt@...><ernstt@...>wrote:
> >
> > Does anybody have experience with the Handheld XRF recently offered
> > by Innov-X? Is it useful in the crime lab or on scenes, or is it of
> > limited usefulness or gimmicky? What samples does it work well on?
> > What sample size is required? I currently have to prepare samples to
> > send to another state lab for elemental analysis (SEM-EDX), so I was
> > wondering if this could be used as a screening test before I prepared
> > those samples. Any advice on price, ease-of-use, usefulness, etc.
> > would be much appreciated!
> >
> > Troy Ernst
> >
>
>
>
>
[Non-text portions of this message have been removed]
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