3.2.1
3 - 19
Explanation 3-4 How to Set 6-cell Measurement Parameters with Coloring Reagent
Elements causing absorbance with coloring reagent (not containing interfering substance)
When using a coloring reagent, the absorption of a sample solution includes that of this reagent
besides those of cell and solvent. For subtracting the absorbance due to the coloring reagent as
well, auto zero is carried out with the solution at <1> in the above figure.
For sample quantitation, the concentration of the sample is determined using the absorbance after
exclusion of cell, solvent and coloring reagent. When the absorption other than those due to cell,
solvent and coloring reagent derives from the analyte alone, the determined concentration equals
the concentration of the analyte as illustrated at <4> in the above figure. For quantitation of this
sample with 6 Cell Mode set to Auto, the STD Autozero, SAMP. Autozero and Thru Zero are set to
STD1, ON or OFF and ON, respectively. (Refer to the measurement parameters in “D” of the
following table.)
Also, when the absorbance of the solution at <1> in the above figure is unstable with time, the
solution is not suited for auto zero operation. Therefore, it is recommended to carry out auto zero
with the blank (sample). In this case, STD Autozero, SAMP. Autozero and Thru Zero are set to
Blank, ON or OFF and ON, respectively. (Refer to the measurement parameters in “E” of the
following table.)
Standard solution
Sample solution
Absorbance
Analyte of interest
Absorbance of analyte
Absorbance-zero line by
auto zero with <1>
Solvent
Cell
<0> <1>
<2>
<3>
<4>
Blank STD1
STD2
STD3
Sample
(solvent and
cell)
Coloring reagent
Standard solution
Sample solution
Absorbance
Analyte of
interest
Absorbance of analyte
Absorbance-zero line by
auto zero with <1>
Solvent
Cell
<0>
<1> <2> <3>
<5>
<4>
Blank
STD1 STD2 STD3
Blank
test Sample
(solvent and
Solution
(interfering substance contained)
cell)
Interfering
substance
Absorbance-zero line by
auto zero with <5>
Coloring
reagent
Содержание U-5100
Страница 280: ...5 1 Check with Instrument Main Unit Alone Fig 5 6 Example Result of Wavelength Accuracy Check at 484 6 nm 5 6 ...
Страница 283: ...5 1 2 Fig 5 10 Example Result of Wavelength Repeatability Check 5 9 ...
Страница 286: ...5 1 Check with Instrument Main Unit Alone Fig 5 14 Example Result of Noise Level Check 5 12 ...
Страница 289: ...5 1 4 Fig 5 18 Example Result of Baseline Flatness Check 5 15 ...
Страница 292: ...5 1 Check with Instrument Main Unit Alone Fig 5 22 Example Result of Baseline Stability Check 5 18 ...