2-4
Isopropyl alcohol
250 nm ~ 400
+
nm
Acetic acid
250 nm ~ 400
+
nm
Ethyl acetate
270 nm ~ 400
+
nm
Carbon tetrachloride
275 nm ~ 400
+
nm
Benzene
280 nm ~ 400
+
nm
Methyl ethyl ketone
335 nm ~ 400
+
nm
Acetone
340 nm ~ 400
+
nm
Carbon disulfide
380 nm ~ 400
+
nm
2.3.2 Special Samples
Note that the laws expressed by Equations (1) and (2) are not applicable to the
following special samples.
Fluorescing samples
Appreciably turbid samples
When measuring solid samples such as a glass plate, the beam energy
undergoes a loss (r) due to reflection at the surface of the solid substance.
In this case, Equation (1) must be transformed as shown below.
It /I
0
= 10
-
ε
·c·l
– r ………………………………………………………. …(3)
Where, ‘r’ varies according to the reflectance of the substance.
2.4 Functions
2.4.1 Quantitative Analysis
The Model HALO RB-10 is capable of calculating the concentration of a
sample after generating a standard calibration curve or by entering a factor into
the system.
The following are the features of this function.
(1) Generation of standard calibration Curve
(a) Working curve can be generated by measuring up to 20 standards by
segmented line method or regression line by least square method.
(b) Any standard sample can be re-measured to generate the working
curve.
(c) A working curve can also be generated by manually inputting
concentration and photometric values.
(d) Analytical results are displayed on the LCD together with the working
curve. Thus, the results can be confirmed while observing the
working curve.