Charles University in Prague, Institute of Geochemistry, Mineralogy, Mineral Resources, Prague, Czech Republic.
Spectrochim Acta A Mol Biomol Spectrosc. 2011 Oct;80(1):36-40. doi: 10.1016/j.saa.2011.01.005. Epub 2011 Jan 12.
Handheld Raman spectrometers (Ahura First Defender XL, Inspector Raman DeltaNu) permit the recording of acceptable and good quality spectra of a large majority of minerals outdoors and on outcrops. Raman spectra of minerals in the current study were obtained using instruments equipped with 785 nm diode lasers. Repetitive measurements carried out under an identical instrumental setup confirmed the reliability of the tested Raman spectrometers. Raman bands are found at correct wavenumber positions within ±3 cm(-1) compared to reference values in the literature. Taking into account several limitations such as the spatial resolution and problems with metallic and black and green minerals handheld Raman spectrometers equipped with 785 nm diode lasers can be applied successfully for the detection of minerals from the majority of classes of the mineralogical system. For the detection of biomarkers and biomolecules using Raman spectroscopy, e.g. for exobiological applications, the near infrared excitation can be considered as a preferred excitation. Areas of potential applications of the actual instruments include all kind of common geoscience work outdoors. Modified Raman systems can be proposed for studies of superficial or subsurface targets for Mars or Lunar investigations.
手持式拉曼光谱仪（Ahura First Defender XL、Inspector Raman DeltaNu）可在户外和露头条件下记录绝大多数矿物的可接受和高质量的拉曼光谱。本研究中矿物的拉曼光谱是使用配备 785nm 半导体激光器的仪器获得的。在相同的仪器设置下进行重复测量，证实了所测试的拉曼光谱仪的可靠性。与文献中的参考值相比，拉曼带在正确的波数位置，误差在 ±3cm(-1) 以内。考虑到空间分辨率等几个限制因素，以及金属和黑色、绿色矿物的问题，配备 785nm 半导体激光器的手持式拉曼光谱仪可成功用于探测大多数矿物体系类别的矿物。对于使用拉曼光谱检测生物标志物和生物分子，例如用于外星生物学应用，近红外激发可以被认为是一种优选的激发方式。实际仪器的潜在应用领域包括所有类型的常见户外地球科学工作。改良的拉曼系统可用于火星或月球研究的表面或地下目标的研究。
