which cause deviations from Beer's law.In this study, only one emission in the visible region was available. The use of lasers in light absorption studies is at present limited because of comparatively few emission lines. Recently, more transitions have been reported in the visible light region with a He-Ne gas laser (3). Other gas laser systems have been studied or suggested which demonstrate many transitions in the UV, ultraviolet, visible, infrared, and far infrared (2,4,5,7,8,10). These developments increase potential applications in the spectro-chemical field.Work is currently in progress in this laboratory in which more complex systems are being studied to determine how other causes of nonlinearity in calibration curves are effected by a laser light source.In addition, other dye systems have been selected whose absorption maxima are significantly different from the 632.8 µ transition of the He-Ne laser. From these studies, some estimate of the applicability of the laser-spectrophotometer combination can be made in respect to off-peak measurements of these kinds.
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