% in routine analysis. However, in the preferable conditions it can be 1% (Hits, Ronald, 1992). The amount of time that is wasted to prepare the elements in MS method is between 20 and 100 min, to provide the general analysis can take from 1 to 20 hours depend on the elements. To prepare the elements for IR method can tale from 1 to 10 min and to evaluate them - 5 min maximum (Griffins, Haseth, 1986). Conclude, both techniques are very helpful in the forensic study. On the one hand, MS is more analytical technique. It is more sensitive and selective. On the other hand, IR is more accurate and spent less time to make the analysis. p align="justify"> сritical summary molecular spectral
Work Cited
Boon, J.J., & Learner, T. (2002). Analytical mass spectrometry of artists 'acrylic emulsion paints by direct temperature resolved mass spectrometry and laser desorption ionisation mass spectrometry. Journal of Analytical and Applied Pyrolysis, 327-344., JM, & Griffiths, PR (2002). Handbook of Vibrational Spectroscopy. Chichester: John Wiley & Sons Ltd., R., Silberring, J., Westman-Brinkmalm, AM, & Kraj, A. (2009). Mass Spectrometry: Instrumentation, Interpretation, and Applications. New Jersey: Wiley. p align="justify"> Fenn, JB; Mann, M.; Meng, CK; Wong, SF; Whitehouse, CM (1989). "Electrospray ionization for mass spectrometry of large biomolecules". Science 246 (4926): 64-71. BibcodeP.R., J. A. de Haseth (1986) Fourier Transform Infrared Spectrometry. New York: Wiley., Ronald A., (1992). Handbook of Mass Spectra Environmental Contaminants, 2nd ed. Boca Raton, FL: Lewis Publishers .. W.W. Gothard, C.M. Busst, M.A. Branthwaite, N J.H. Davies and D.M. Denison (1980). "Applications of respiratory mass spectrometry to intensive care". Anaesthesia 35 (9): 890-895
Karate, Francis W., Ray E. Clement. (1988). Basic Gas Chromatography-Mass Spectrometry: Principles & Techniques. Amsterdam: Elsevier. , K.; Davies, Gordon; Vinh, N.; West, D.; Estreicher, S.; Gregorkiewicz, T.; Izeddin, I.; Itoh, K. (2006). "Isotope Dependence of the Lifetime of the 1136-cm-1 Vibration of Oxygen in Silicon". Physical Review Letters 96 (22): 225503. BibcodeS. (2000). "Multidimensional Fentosecond Correlation Spectroscopies of Electronic and Vibrational Excitations". Annual Review of Physics and Chemistry 51 (1): 691. Demird Г¶ ven, CM Cheatum, H.S. Chung, M. Khalil, J. Knoester, A. Tokmakoff (2004). "Two-dimensional infrared spectroscopy of antiparallel beta-sheet secondary structure". Journal of the American Chemical Society 126 (25): 7981. Hamm, M.H. Lim, R.M. Hochstrasser (1998). "Structure of the amide I band of peptides measured by femtosecond nonlinear-infrared spectroscopy". J. Phys. Chem. B, Peter Atkins, Julio de (2009). Elements of physical chemistry (5th ed. Ed.). Oxford: Oxford...
