วันศุกร์ที่ 25 ตุลาคม พ.ศ. 2556

Weak absorbance in NIR region is beneficial.

"The primary advantage of the NIR region is that absorbances are lower than in neighbouring regions and generally obey the Beer/Lambert law, i.e., absorbance increases linearly with concentration. This is because NIR absorptions are generally 10-100 times weaker in intensity than the fundamental mid-IR absorption bands. The weakness of the absorptions is a benefit, providing direct analysis of samples without dilution or the requirement of short optical pathlengths or dispersion in non-absorbing matrices used in traditional sampling techniques in UV/Vis and mid-IR spectroscopies."

(http://www.pdkprojects.com/aboutnirs.html#calibration)

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