Abstract

A brief cross-comparison study, focusing upon several optical technique configured as new instrumentation, including UV (254 nm) absorption spectrometry and optical fluorescence (excitation at 340 nm, emission measurement at 420 nm), together with established chemical methods for estimating total organic carbon (TOC) in a small range of water samples, has been made. An important aspect of the study is that although the range of samples is limited, they are obtained from a variety of sources and they are used with several different instrumental techniques. In addition, the results of the work are assessed relative to those from a proprietary UV in-line absorption monitor commonly used in industry. In spite of the restricted range of samples, the work has shown a useful correlation between proprietary measurements and both the near-UV absorption and fluorescence measurements made. These indicate the feasibility of both approaches in the design of new field-based instruments for TOC determination using optoelectronic devices.

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