Methods, apparatus and/or systems are disclosed for collecting and processing of spectral data from an object to enable the determination of the presence and/or amount of a target analyte present in the object is disclosed. The object may be a portion of a persons body such as the forearm, palms, fingers, or eye. The target analyte may be ethanol. The method/apparatus/system for performing such spectral data collection may include one or more broadband emitters such as thermal emitters (aka “black-body” or “gray-body” emitters), incandescent sources, light emitting diodes, and the like.
