文献 | 量子荧光|微型光纤光谱仪-ag贵宾会

激光诱导击穿光谱技术是通过探测等离子体中原子或离子光谱来分析样品中的元素种类和含量，以便实现对物质元素成分的定性及定量分析。作为一种定性与定量分析工具，libs具有对样品破坏性小、无需复杂的样品预处理、能同时对多种元素进行分析及能实时在线分析等优点，因此非常适用于固体、液体及气体元素成分的实时监测。目前，libs已被广泛地应用于环境污染监控、地质土壤检测、冶金分析、艺术品鉴定、材料分析与生物医学化验等领域。

the monitoring of sulfur dioxide (so2) from industrial pollution emissions was studied in 10 the ultraviolet spectral range using a broadband absorption spectroscopic sensor. the sensor has a detection limit of 1 ppm, and was employed for two certified so2 concentrations in laboratory. the continuous 24 h measurements of concentrations and temperatures of so2 in the flue gas emitted from an industrial coal-fired boiler was performed in the field measurement campaign, which demonstrated the repeatability, sturdiness, and practicability of the sensor by analyzing the concentration variation 15 with gas temperatures and comparing the measured value with the true value of total release.

this document is the final report for cooperative agreement de-fc26-04nt42314, “kinetics study of mercury reactions in fgd liquors.” the project was co-funded by the u.s. doe national energy technology laboratory and epri. the objective of the project has been to determine the mechanisms and kinetics of the aqueous reactions of mercury absorbed by wet flue gas desulfurization (fgd) systems, and develop a kinetics model to predict mercury reactions in wet fgd systems. the model may be used to determine optimum wet fgd design and operating conditions to maximize mercury capture in wet fgd systems. initially, a series of bench-top, liquid-phase reactor tests were conducted and mercury species concentrations were measured by uv/visible light spectroscopy to determine reactant and byproduct concentrations over time. other measurement methods, such as atomic absorption, were used to measure concentrations of vapor-phase elemental mercury, that cannot be measured by uv/visible light spectroscopy.

a method for the automatic synthesis of the ultraviolet-visible-near infrared (uv-vis-nir) absorption and transmission spectra of dye mixtures based on the absorption characteristics of their individual dyes is proposed in this paper. multiple linear regression models (mlr) of each dye are obtained using a fiber-optic set-up operating in the 200–1100 nm wavelength range. textile dyes are thick and dense and, consequently, optically opaque. this gives rise to high absorbance values which do not permit the direct comparison of different textile dye spectra for quality assurance purposes. the proposed multivariate method allows to construct a general model adjusted to the number and concentration of the dyes in the mixture. furthermore, this dye spectrum synthesis can provide the optimum dilution factor needed to compare two different dye mixtures and test their similarity degree. with the proposed system, the obtained spectral correlation coefficients between the measured and synthesized spectra of a dye mixture are greater than 99% for both the transmission and absorption spectra.