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Sample evaluation
examples
Granular sample surface analysis: analysis of
the degree of freshness of rice grains
The volume of aliphatic acid sticking to the rice grain surface depends on the
degree of freshness of the rice. Three grains of rice from different harvest years
were placed on the gel formed film on the pH image sensor. We saw that the lower
the pH formed area was the older the harvest year was and the larger the area
it covered. In addition the correlation between the freshness of the rice and
the pH alteration could be seen from the pH profile obtained running parallel
to line X on the image. These results display that this microscope can easily
and quantitatively evaluate the degree of freshness.
 
Image size: 16.8 mm X 7.1 mm
Point of measurement interval: 0.1 mm
Sample harvest years: A: 1995, B: 1996, C:1997
pH profile on line X
Samples supplied by Assistant Professor Hatta of Kyoto Women's University
Sheet form sample surface analysis: Magnetic tape evaluation
Fragments of two kinds of magnetic tape were placed on the gel formed film on
the pH image sensor. A pH alteration was only observed for sample B. This suggests
that either an alkali substance was sticking to the tape sample surface or some
type of chemical reaction took place due to the moisture influence. These results
display that this microscope is useful for the analysis and evaluation of magnetic
tape.
 
Image size: 9.5 mm X 9.0 mm
Point of measurement interval: 0.2 mm
The white lines show where to place the samples.
Fiber form sample surface analysis: Hair damage
evaluation
Hair color treatment leaves alkali inside the hair which can cause people to worry
about damage to their hair. The hair was washed after hair color treatment was
used to change the hair color and then two kinds of hair samples were taken. Hair
samples which had not been treated by hair coloring were placed on the gel formed
film on the pH image sensor. Only the hair samples which had been treated by hair
coloring (samples A and B) had an alkali area formed on them. We were able to
see that the hair sample which had not been treated (sample C) did not display
any alteration of any of the pH values. These results display that the pH imaging
from this microscope is useful for evaluating the safety of hair colors and for
developing hair colors.
 
Image size: 19.6 mm X 12.0 mm
Point of measurement interval: 0.1 mm
The dotted lines show where to place the samples.
This sample was supplied by Yamahatsu Sangyo. |
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