###### Abstract
\begin{table}
\begin{tabular}{l c c c c} \hline \hline \multicolumn{1}{c}{**Plant**} & & & & \\ \hline
**Common Name** & Flax & Velvet Leaf & Hemp & Jute \\
**Species**[13] & _Linum usitatissimum_ L. & _Aubution thephrasti_ & _Camabis sativa_ L. & _Corchorus olitorius_ L. \\
**Botanic Family**[13] & Linaceae & Malvacaee & Cannabaceae & Malvacaee \\
**Center of Origin** & probably Egypt [14] & Southern Asia [15] & Central Asia [16] & Africa [17] \\
**Fibers** & cellulose 64–75\%, lignin 4–7\% [18] & cellulose 69\%, lignin 17\% [19] & cellulose 57–77\%, lignin 9–13\% [19] & cellulose 59–61\%, lignin 11–13\% [20] \\
**Medicinal** & diarrhoea and gastrointestinal infections [21] & fever, stomachaches [15] & analgesic, sores, skin disease [22] & anti-oxidant and anti-diabetic effect [23] \\
**Edible** & seeds [24] & leaves [15] & seeds [22] & leaves [25], fruits [26] \\
**Oil** & seed oil [24] & seed oil [27] & seed oil [22] & seed oil [28] \\
**Phytoremediation** & various heavy metals [29] & - & Cd, Pb, Ni [30] & Cd [31] \\
**Biosynthesis of** & **Nu NPs**[32] & - & Au, Ag-NPs [33] & Au, Fe-NPs [34] \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Primary and secondary importance of some commonly cultivated fiber species. Figure 1: Structural organization of lignocellulosic plant fibers (original drawing). contain the function group -OH in their structure and explain the strong hydrophilic property of plant-based fibers [44]. In practice, lignocellulosic plant fibers are usually characterized after extraction. Parameters that present importance refer to chemical and physical properties [19]. However, characterization conducted after extraction depends to a great extent on the extraction procedure employed, with results varying with conditions and the isolation method used due to their qualitative influence over the sample [19; 38; 42]. In addition, these methods are most often lengthy procedures and do not allow quick analysis. A fast method would be highly suitable for raw materials such as stems to be quickly analyzed. However, so far, insufficient attention has been given to optimizing analysis methods for these materials. Particularly, there is need to clearly define spectral marker regions that could be considered in the qualitative assessment of such raw materials. The optimization of characterization methods for raw materials is important and could find immediate practical applications. Fast characterization might render a precise overall quality measurement that could be particularly helpful for fast qualitative screening with applications for the preliminary sorting of the raw materials represented by unprocessed plant stems before undergoing lengthy extraction and isolation procedures. FT-IR (Fourier Transform Infrared Spectroscopy) is a highly useful tool that relies on the measurements of molecular bonds vibration modes, providing an informative fingerprint of the general chemical composition for a given sample. It has been used successfully for the characterization of plants and their constituents [45; 46]. Defining fingerprint FT-IR spectral regions could serve for fast qualitative analysis of stems from fiber plants without the need for lengthy sample preparation. This could serve as a preliminary screening method for qualitative sorting, while also eliminating the influence of extraction and thus providing an accurate overall fingerprint for the raw material analyzed. Because cellulose is the main constituent of plant fibers, identification and characterization based on assigned spectral regions can enable inferences about its presence including certain parameters such as abundance, crystallinity or structural particularities of this constituent directly in stem tissue before any treatment that could alter or change the structural integrity of native cellulose.