Measurement of Samples (Daily routine)
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MiniFlex 600: Benchtop X-ray Diffractometer
Therefore this cannot be used for precision measurement of diffracted rays. This
method, however, provides sufficiently good data to use for qualitative analysis.
* A “zero background sample plate” is available as an option. This sample plate
does not cause halo as with diffracted X-rays or a glass sample plate, and is
therefore useful for measuring a small amount of sample material.
Another method commonly used for identifying inorganic substances is referred
to as the “smear mount method.” In this method, a sample is mixed with a small
amount of a volatile organic solution such as alcohol and acetone. Then it is
grounded thoroughly in an agate mortar. A thin coat of this sample is then
applied on a glass plate. Keep in mind that if the sample amount is small, the
intensity of diffracted X-rays will appear lower in the high-angle area, thus
reducing the reliability of results.
A binder is usually prepared by diluting collodion solution with an organic
solution such as isoamyl acetate and toluene.
An adhesive such as “Cemedine” may be used, but amorphous haloes or peaks
will be observed if the binder leaves substances deposited from solution after
evaporation.
Fig. 8.4 Preparation of a small amount of powder sample on glass sample plate
Cleaning spilled or deposited powder sample
You may find placing a styrol plastic case under the sample holder to be useful,
as it will minimize the task of cleaning the samples spilled within the sample
chamber. If the powder sample spills from the styrol plastic case or sticks to any
other part, vacuum-clean it using a nozzle with a small slit. In addition, wipe it
off thoroughly with a piece of cloth or soft paper, wherever it is viable.
