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- Title
Evaluation of optical detection methods for waterborne suspensions
- Authors
Patnaik, Priyambada; Sethi, Virendra; Rice, Eugene W.; Biswas, Pratim; Clark, Robert M.
- Abstract
Turbidimeters and optical particle counters (OPCs) are used to monitor particulate matter in water. The response from these instruments is governed by the optical properties of the suspension and the instrument design. The recommended design criteria for turbidimeters allow for large tolerances that lead to variations in measurements from different instruments. OPCs provide size-specific information but mayinaccurately size microorganisms or particles having optical properties different from those of the calibration particles. The authors evaluate the effects of optical design parameters in turbidimeters andOPCs. Performance data from two OPCs are presented. A multiple-angle light-scattering method was developed to obtain "optical signatures" from suspensions of monodisperse spheres and several microorganismisolates. Such "signatures" provide more optical information on waterborne particles and may also be used to identify specific types of microorganisms in real time.
- Publication
Journal: American Water Works Association, 1997, Vol 89, Issue 2, p98
- ISSN
0003-150X
- Publication type
Article