isosbestic point

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i·sos·best·ic point

in applied spectroscopy, a wavelength at which absorbance of two substances, one of which can be converted into the other, is the same.

i·sos·best·ic point

(ī'sos-bes'tik poynt)
applied spectroscopy A wavelength at which absorbance of two substances, one of which can be converted into the other, is the same.
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References in periodicals archive ?
One clear isosbestic point that is observed at 685 nm (Figure 3(b)) proves that the phenomenon is due to some equilibrium processes leading to the formation of chemical intermediates between [beta]-carotene and the MnTTPCl/n-Au hybrid.
Shifting of the ligand peaks was observed along with the formation of isosbestic points with gradual increase of pH.
Fortunately, techniques such as those disclosed above can overcome this limitation because oxy- and deoxyhemoglobin have numerous isosbestic points in the visible spectral range, allowing blood vessels to be imaged with visible light.
One chooses a combination of absorption maxima and isosbestic points, with a total number of wavelengths equal to the number of components of interest.