Talk:X-ray fluorescence

message: The article mentions the verb "analyze" in the fourth paragraph, but at no point does it say what XRF actually does.  This subject requires a pretty meaty article.  I'll have a go when I get a minute. . . . LinguisticDemographer 14:30, 23 December 2006 (UTC)
thread_title: Untitled

message: I made a start on this and it remains work in progress.  There was a commercial link, and I toyed with the idea of deleting it, but decided instead to expand it to a (probably) full list of manufacturers, as in the French article.  Since these are few in number, and their websites provide useful information, this may be acceptable, but wiki policy may well dictate that they all be removed. . . .
LinguisticDemographer 00:39, 24 December 2006 (UTC)
thread_title: Re-write 24 Dec 2006

message: SPECTRO has been a manufacturer of X-ray Fluorescence spectrometers since the early 1990's.  Our URL is www.spectro.com - where we also offer an XRF Fundamentals eLearning program.
To the person with the the "juice" and willingness to make the edit, I say thank you!
Kind regards,
Tom Milner (tmilner@spectro.com)
Marketing Director,
SPECTRO Analytical Instruments
195.243.208.68 13:00, 27 June 2007 (UTC)
thread_title:  Please add SPECTRO to the list of manufacturers 

message: A small handful of manufacturers' websites were initially included in this article because they contained useful explanations and propriatory graphics that can't be included in the article for copyright reasons.  However, since then these links have proliferated, and many of these are of little general informational value.  In view of the "no advertising" rule, and in the interests of fairness, it's probably best if all the manufacturers' sites are deleted. . . .LinguisticDemographer 21:22, 31 August 2007 (UTC)
thread_title: Spam links

message: Please add information about portable, miniature, and hand-held XRF equipment.  Field testing in geology, lead paint, toy testing, etc.  This is not just a big laboratory instrument!  Please make the article more understandable, relevant, and current.-69.87.204.246 23:37, 8 September 2007 (UTC)
replies: text: Please do not put commercial material in Wikipedia articles or talk pages.  Guidance on the Wikipedia policies on this can be found in Wikipedia:What Wikipedia is not. . . .LinguisticDemographer 15:34, 10 September 2007 (UTC)
thread_title:  hand-held XRF equipment 

message: Although the purpose of the equipment may be to test for hazards, the equipment itself may be a source of danger.  Many models use radioactive sources.  Which may require frequent replacement.  And the X-rays emitted may be a hazard.  The article should cover these aspects.
"...the only handheld XRF instruments to offer customers a choice of sources and configurations:
* 50 kV (max) miniaturized x-ray tube — for lowest detection limits, best precision and accuracy, and fastest measurement times
* Patented Infiniton radioisotope source — the only XRF analyzer which never requires source replacement; the ideal choice in locations where x-ray tube sources are heavily regulated
* Cadmium-109 radioisotope source"
"How long is the half life for CO57 and when do I re-source the instrument?
* The half life for CO57 is approximately nine months (272 days).  This period is fixed by nature.  The source will decay at the same rate whether the instrument is used once or a million times...  RMD recommends changing the source every 12-15 months.
How much radiation is an operator exposed to by the LPA-1?
* The LPA-1 Analyzer contains a maximum of 12 mCi (millicurie) of Cobalt 57 (Co57) radioactive material sealed, and housed in a tungsten shield inside the instrument.  The source can only be exposed when the system is in contact with a surface.  The low activity of the source and the shield, along with proper operation results in no radiation hazard to the operator.  The radiation dose rate at the operators hand is approximately 0.3 mRem/hr (Millirem per hour) with the shutter open or closed...  the user must receive a license or registration from the local state agency. Some states accept a general license.
Radiation Source
* Cobalt-57 (Min. 10 mCi, Max. 12 mCi, 444 MBq)
RMD's LPA-1 analyzer radioactive source is a 12 mCi, Cobalt 57 isotope. Co-57 gamma ray energies (122 Kev) are more efficient (at least 10 times) than those of Cd-109 (22-26 Kev and 88 Kev) source for production of K-shell lead x-rays, which are recommended by HUD chapter 7 for measurement of lead in paint. Therefore, the measurement time is shorter using a Co-57 source.
Detector
* The LPA-1 analyzer utilizes a "room-temperature" detector, CdTe, for its x-ray analysis that operates in a wide, 20-120° F, thermal range without any cooling requirements. The LPA-1 analyzer's ability to operate without cooling eliminates a cooling down period for stability at the beginning of a job that would result in extra time added to inspections.
Operation
* The LPA-1 XRF system has the capability of setting abatement levels from 0.4-2.0 mg/cm2 for automatic determination of the lead condition as either positive or negative with 95% confidence according to a PCS approved mode of operation."
-69.87.199.214 19:23, 9 September 2007 (UTC)
thread_title:  hazards 

message: If you own a hand-held, please add photos to this article.  If you make hand-held equipment, please put some photos in the public domain, and put links here, so that we can add them to the article.-69.87.199.214 19:27, 9 September 2007 (UTC)
replies: text: Please do not put commercial material in Wikipedia articles or talk pages.  Guidance on the Wikipedia policies on this can be found in Wikipedia:What Wikipedia is not. . . .LinguisticDemographer 15:34, 10 September 2007 (UTC)
thread_title:  photos 

message: "new handheld XRF analyser for light metals...
...applications where Optical Emission Spectroscopy cannot be used because of the mark the technique leaves on the surface... 
With traditional portable XRF analysers, alloy identification has been based on the analysis of the heavy elements because magnesium, aluminum and silicon produce low energy x-rays that are impeded by air. The portable vacuum pump ... evacuates the analysis path of air, making the measurement of these elements possible." -69.87.204.246 01:04, 9 September 2007 (UTC)
thread_title:  portable vacuum pump 

message: This is a daunting article.  It would be good to try to give the basics at the beginning, for people who will not be able to digest the whole thing.  The key concept here is, we stimulate a test sample with X-rays.  We get some signals back that we can analyze to find out what ELEMENTS are in the sample.  I don't know why the lead paragraph said "chemical analysis".  I have added "elemental analysis".  It would be good to have this reviewed by someone knowledgeable.  But we really need to focus on making the lead paragraph more accessible to the general reader.-69.87.204.246 00:22, 9 September 2007 (UTC)
replies: text: Thanks for the suggestion.  I'm still looking for someone knowledgeable, but no luck! . . . .LinguisticDemographer 06:09, 9 September 2007 (UTC)
thread_title:  Elemental vs. chemical analysis 

message: Substantial parts of this article were written by me.  I am a well known researcher in this field.  I hereby assert that all those parts of the article that were written by me and are not provided with references are the results of my own original research.  Wikipedia rules state that information that is the result of original research is prohibited, and where such information is unambiguously present in an article, it is the duty of every editor to remove it forthwith.
LinguisticDemographer (talk) 22:27, 15 April 2010 (UTC)
thread_title: Original Research

message: Mini XRF is often used to judge the honesty of precious metal objects and there are specialized devices for this very purpose. However, even industrial strenght X-ray cannot penetrate solid gold more than the widht of a hair or 1 sheet of office paper at best, so XRF only judges if the object's exterior is truly noble. The insides may well be fake, made of tungsten/wolfram (for gold) and cuprum (for silver), with just a thin precious metal plating on the outside.
XRF cannot replace the magnifying loupe and the diamond filer, when investigating metals for valuation or certification. Because of the excessive demand for internally precious metals in this time of great economic crisis, fake gold and silver are galore everywhere and people think handheld XRF is a divining rod, which it isn't. The article could devote a paragraph to this topic, because it is something people encounter. 82.131.210.163 (talk) 16:43, 11 January 2012 (UTC)
thread_title:  XRFinegold 

message: Substituted at 10:57, 30 April 2016 (UTC)
thread_title: Assessment comment

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Participate in the deletion discussion at the . —Community Tech bot (talk) 19:22, 18 March 2019 (UTC)
thread_title:  A Commons file used on this page has been nominated for deletion 

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thread_title:  A Commons file used on this page has been nominated for deletion 

message: I work with different x-ray emission spectroscopes and other fluoresence detection instruments everyday and I can say that sample preparation depends heavily on the method of measurement, involving energy range, different scattering processes, self absorption effects and even how moch sample is available.
So for a unique setup of emission measurements we can use really disperse samples and only sprinkle some on a thin adhesive kapton tape where the hole diameter is around 4mm.
Another, not so unique, setup has to have a really pure, dense sample of ~80mg in a circular sampleholder of 15mm inside diameter. 
The thing I am saying is, that maybe this setcion should be made more general, maybe talk about the things that matter in sample prep maybe some things that I have already mentioned now.
But as it is now, it is described for one setup. Maybe it is a commercial instrument, so more than one person could use it, but i am sure there is a manual for each instrument.
Feel free to drop your opinion. Thanks in advance!
Mr.532nm (talk) 14:45, 21 July 2020 (UTC)
thread_title: Sample preparation is quite specific