Ground-Water Monitoring Using Remote Laser-Induced Fluorescence

Kenny, Jonathan E.; Jarvis, George B.; Chudyk, Wayne; Pohlig, Kenneth

doi:10.1021/bk-1989-0383.ch014

Cited by 4 publications

(3 citation statements)

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“…Apart from using optical fibers in the digital holography, it can also be used for sensing applications or for guiding signals in shallow and deep water. For example, Kenny et al detected phenols and gasoline in groundwater using laser-induced fluorescence along optical fibers [ 132 ]. This rather old technique can also be exploited for the detection of MPs in water.…”

Section: Development Of In Situ Detection Techniques For Screeningmentioning

confidence: 99%

Towards the Development of Portable and In Situ Optical Devices for Detection of Micro-and Nanoplastics in Water: A Review on the Current Status

et al. 2021

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The prevalent nature of micro and nanoplastics (MP/NPs) on environmental pollution and health-related issues has led to the development of various methods, usually based on Fourier-transform infrared (FTIR) and Raman spectroscopies, for their detection. Unfortunately, most of the developed techniques are laboratory-based with little focus on in situ detection of MPs. In this review, we aim to give an up-to-date report on the different optical measurement methods that have been exploited in the screening of MPs isolated from their natural environments, such as water. The progress and the potential of portable optical sensors for field studies of MPs are described, including remote sensing methods. We also propose other optical methods to be considered for the development of potential in situ integrated optical devices for continuous detection of MPs and NPs. Integrated optical solutions are especially necessary for the development of robust portable and in situ optical sensors for the quantitative detection and classification of water-based MPs.

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Section: Development Of In Situ Detection Techniques For Screeningmentioning

confidence: 99%

Towards the Development of Portable and In Situ Optical Devices for Detection of Micro-and Nanoplastics in Water: A Review on the Current Status

et al. 2021

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“…In addition, some quantitatively meaningful measurements have been obtained on subsurface water at one field site; these numbers are in approximate agreement with results of conventional sampling and analysis techniques which were obtained several months earlier. 7 What follows is a brief summary of the experiences incurred and procedures developed, along with a discussion of how field measurements are interpreted.…”

Section: Calibration Curvesmentioning

confidence: 99%

“…Using this reasoning, we reported results of our field measurements at a given site as equivalents of phenol and of xylene. 7 Available information on a site will in many cases allow a rather complete library of response curves for all likely contaminants to be prepared, and the maximum concentration levels for all of these may be reported after analysis of a site by the remote sensing mobile unit. Of course, as with most analytical techniques, some situations can be envisaged in which interferences exist and prevent straightforward interpretetion; however, we expect that this technique would not be applied so much for characterization of a site as for monitoring a previously characterized site, and such anomalous situations would be avoided.…”

Section: Interpretation Of Datamentioning

confidence: 99%

Remote Laser-Induced Fluorescence Monitoring of Groundwater Contaminants: Prototype Field Instrument

Kenny¹,

Jarvis²,

Chudyk³

et al. 1987

Instrumentation Science & Technology

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Direct, in situ monitoring of many groundwater contaminants is possible using the Remote Laser-Induced Fluorescence (RLIF) technique.We have designed, laboratory-tested, and field-tested a prototype mobile instrument capable of performing such monitoring. It consists of a portable, computer-controlled fluorimeter with a frequency-quadrupled Nd:YAG laser as a UV excitation source, detachable fiber optic sensor, and a detection module employing two photomultiplier tubes and a dualchannel boxcar averager for signal recovery. In this report, we give a complete description of the hardware and software utilized in the instrument, along with a summary of our field testing procedures and experiences, and an assessment of the technique's current and potential capabilities. 423 Copyright© 1987 by Marcel Dekker, Inc. Downloaded by [McMaster University] at 00:02 16 June 2016 424 KENNY ET AL.

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