Optimization of the continuous analysis Pearl-Benson method for lignosulfonates Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/bn999b17m

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  • A procedure is described for the optimization of a previously described continuous analysis adaptation of the Pearl-Benson or nitroso method for estimation of spent sulfite liquor (SSL) or ligno-sulfonates. The optimized procedure has a response time of 6.5 minutes. In order to monitor samples whose SSL concentration is between 0 and 10 ppm, a long path length, dual beam, flow through colorimeter was developed. The colorimeter has a range of 0.94 absorbance units for a 10 cm cuvette length, and has a readout which expresses the sample concentration directly in millivolts. Both the continuous analysis chemical manipulation system and the colorimeter are packaged as portable units. An empirical equation is obtained for the response curve of continuous analyzers. This equation permits simulation of the continuous analyzer response in both a mathematical form and on an analog computer. Examination of the electrical analog leads to information about the response of continuous analysis apparatus to a variety of input signals and provides an approach to figures of merit for comparison of continuous analysis systems. An electronic method is illustrated for predicting the steady state value of a continuous analysis apparatus long before that steady state condition is obtained.
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  • File scanned at 300 ppi using ScandAll PRO 1.8.1 on a Fi-6770A in PDF format. CVista PdfCompressor 5.0 was used for pdf compression and textual OCR.
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