Hach Pocket Colorimeter II Single Wavelength Manuel D'utilisation page 14

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Figure 6 Select the best wavelength – sample spectrum
1 Absorbance 2 Wavelength (nm)
Table 1 Light wavelength and color
Sample color Light absorbed Wavelength (nm)
Yellow-green Violet 420
Yellow Violet-blue 450
Orange Blue 476
Orange-red Blue-green 500
Red Green 528
Red-violet Yellow-green 550
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