This paper provides a collection of basic spectral analytical procedures and demonstrates their applicability in detecting errors of near infrared data. Evaluation methods based on standard deviation, coefficient of variation, mean centering and smoothing techniques are. Trace analysis in analytical chemistry generally requires establishing the limit of detection (LOD, or simply detection limit), which is the lowest quantity of a substance that can be distinguished from the system noise absent of that substance (a blank value). Mass spectrometers are increasing. We introduce OASIS (Omni-purpose Analysis of Spectra via Intelligent Systems), a machine learning (ML) framework for technique-independent, automated spectral analysis, encompassing denoising, baseline correction, and comprehensive peak parameter (location, intensity, FWHM) retrieval without human. The sensitivity of a USB spectrometer or other optical device relates to the devices ability to detect weak or low-intensity signals. These secondary electrons are then attracted to the second dynode, where each electron produces several more electrons, and so on. With a quadrupole, we want to measure an ion current. The LOD (limit of detection) and LOQ (limit of quantitation) are often defined as the concentrations which yield a measure peak with S/N of 3 and 10 respectively. However, as will be described, this method can be misleading and should not be used when evaluating instrument performance, and should.