Abstract: A spectrophotometer includes a plurality of LEDs arranged in a circular array, each having a calibrated power input determined by the use of pulse width modulation and each having a unique wavelength band determined by the utilization of a unique fluorescent phosphor coating or lens. At least one of the LEDs comprising a phosphor-free high energy UV LED. Light reflected to the spectrophotometer is divided into predetermined wavelength ranges through the utilization of a linear variable filter and photo detectors wherein the analog signal from a photo detector is converted to a digital value through the use of auto-ranging gain technique.

Abstract: A computer facilitated method of requesting a spectral analysis of a sample having an unknown concentration or purity, performing an energy absorption analysis of the sample to obtain spectral data regarding the analysis and comparing the spectral data to stored spectral data regarding the analyses of the samples having a predetermined concentration and purity to determine the concentration or purity of the sample having an unknown concentration or purity. The spectral analysis is performed on site where the sample is prepared or administered using a portable analytical apparatus and provides a real time report of the concentration or purity of the sample. The apparatus requires only a small sample size.

Abstract: A computer facilitated method of requesting a spectral analysis of a sample having an unknown concentration or purity, performing an energy absorption analysis of the sample to obtain spectral data regarding the analysis and comparing the spectral data to a stored spectral data regarding the analyses of the samples having a predetermined concentration and purity to determine the concentration or purity of the sample having an unknown concentration or purity. The spectral analysis is performed on site where the sample is prepared or administered using a portable analytical apparatus and provides a real time report of the concentration or purity of the sample. The apparatus requires only a small sample size.