Abstract

We describe a methodology which allows identification and quantitation of individual triterpenes in natural mixtures, using the computer-aided analysis of their 13C NMR spectra, without previous separation. The analytical procedure was validated on artificial mixtures and applied to authentic extracts of cork. Identification of triterpenes was possible with the use of either reference spectra recorded in our laboratory or literature data.

Nondestructive evaluation of cork enclosures using terahertz/millimeter wave spectroscopy and imaging

Yew Li Hor, John F. Federici, and Robert L. Wample
Appl. Opt. 47(1) 72-78 (2008)

Qualitative and quantitative analysis of steatite using calibration-free laser-induced breakdown spectroscopy in conjunction with x-ray fluorescence spectroscopy and Fourier-transform infrared spectroscopy

Muhammad Fahad, Asim Shahzad, Sajjad Ali, and Khizar Hussain Shah
Appl. Opt. 60(17) 5110-5116 (2021)

Qualitative and quantitative analysis of an additive element in metal oxide nanometer film using laser induced breakdown spectroscopy

Junshan Xiu, Shiming Liu, Meiling Sun, and Lili Dong
Appl. Opt. 57(3) 404-408 (2018)

Rapid qualitative and quantitative analysis of elemental composition of Cu(In, Ga)Se₂ thin films using laser-induced breakdown spectroscopy

Junshan Xiu, Shiming Liu, Shenggui Fu, Tao Wang, Mingxing Meng, and Yunyan Liu
Appl. Opt. 58(4) 1040-1047 (2019)

Organic Analysis

K. Biemann
Appl. Opt. 9(6) 1282-1288 (1970)