[Ifeffit] Calculation of metal concentration (and hence density) from Edge Jump

[pushkar shejwalkar]

Thank you, Bruce and Alexey for your kind information.
Bruce the communication, unfortunately, is not available on our Internet
connection from university to download for free. Do you think it would be
possible (under the copyrights act off course) for you send a PDF copy? The
communication seems really interesting and I will keep the procedure in
mind (for March Dates when we have BL for us again) to make sure that we
have a calibration curve. (off course XRF is more reliable and easy).
Alexey, I read the section (also some other information in that book). The
book is really great. Thanks for sharing.
I have already sat down with the pen and paper. but just want to know one
thing. Is Edge Jump = Absorbance?? or we need to calculate the absorbance
by actually practically finding out the I and Io?
e.g. if edge jump = absorbance I can modify the equation I = Io^e-upd into
its A form. If not I will use ion chamber gas ratio to calculate the I and
Io respectively.
Which way is more correct?
Best Regards
Pushkar

On Tue, Feb 21, 2017 at 10:15 PM, Bruce Ravel <bravel at bnl.gov> wrote:

>
>
> This might help: https://doi.org/10.1107/S1600577514001283
>
> Note that we measured a sequence of standards of known thickness and
> concentration /prior/ to the rest of the experiment, so the methodology in
> that paper might not be useful after the fact in the absence of that prep
> work.
>
> B
>
>
> On 02/20/2017 10:19 PM, pushkar shejwalkar wrote:
>
>> Dear All,
>>     First of all, is it possible to calculate the concentration of metal
>> (loading, therefore) from just the edge jump? Is there a simpler
>> equation like knowing the Flux values or some basic instrumental
>> information we can calculate the concentration term using Io and It
>> values of beamline (the simplest form of Beer-lambert law)? if so what
>> formula should we use.
>> I searched in the mailing list archive and have found one such archive
>> but it discusses how to use calculation to find out how much sample
>> would be needed to get the edge jump. I am rather interested in the
>> reverse way. I have an experimental edge jump and want to calculate (if
>> possible with as much accuracy as possible) the concentration of metal.
>> I know with only edge jump it will be difficult and XRF will be a better
>> and more reliable way. But for better understanding and cross checking
>> between different samples, I wish to do such calculations.
>> Can anyone guide me to the right direction and equations to do such
>> calculations?
>> Thank you all in advance
>> Warmest regards
>> Pushkar
>>
>> --
>> Best Regards,
>> Pushkar Shejwalkar.
>> Post-doctoral -Researcher,
>> Tokyo Engineering University,
>> Tokyo-to
>> Japan
>>
>>
>>
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>>
>
> --
>  Bruce Ravel  ------------------------------------ bravel at bnl.gov
>
>  National Institute of Standards and Technology
>  Synchrotron Science Group at NSLS-II
>  Building 743, Room 114
>  Upton NY, 11973
>
>  Homepage:    http://bruceravel.github.io/home/
>  Software:    https://github.com/bruceravel
>  Demeter:     http://bruceravel.github.io/demeter/
>
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-- 
Best Regards,
Pushkar Shejwalkar.
Post-doctoral -Researcher,
Tokyo Engineering University,
Tokyo-to
Japan
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