一种新仪器可用于在线监测水中的硝酸盐和/或铁。该仪器使用吸收光谱法和高度先进的分析算法来确定溶液中某些化学成分的存在和浓度。分析技术使用样品流在一定波长范围内的自然吸光度特性，无需物理改变样品或将任何试剂引入样品线。该技术能够同时分析多种化学成分，并监测多条采样线。虽然这项技术最初是由美国宇航局开发使用的，但后来已被证明可用于水和废水应用，包括监测和控制几个重要的水处理过程。 将提供将使用本仪器获得的在线分析结果与使用标准实验室方法获得的分析结果进行比较的信息。

A new instrument is available for on-line monitoring of nitrate and/or iron in water. This instrument uses absorbance spectrometry and highly advanced analytical algorithms to determine the presence and concentration of certain chemical components in solutions. The analytical technique uses the natural absorbance characteristics of a sample stream over a range of wavelengths without the need to physically alter the sample or the need to introduce any reagents into the sample line. The technology is capable of simultaneously analyzing several chemical constituents and of monitoring multiple sample lines. Although this technology was originally developed for use by NASA, it has since been demonstrated for use in water and wastewater applications, including the monitoring and control of several important water treatment processes. Information will be presented which will compare on-line analytical results obtained using this instrument with analytical results obtained using standard laboratory methods.