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Peer reviewedWeber, Stephen G.; Long, John T. – Analytical Chemistry, 1988
Discusses three aspects of electrochemical detectors: (1) signal and noise generation and signal-to-noise ratio, (2) improvement of qualitative information content, and (3) control of selectivity of the detector. Explains electronic principles of detectors and detection limits. Lists current applications and research. (ML)
Descriptors: Chemical Analysis, Chemistry, College Science, Electronic Control
Peer reviewedCotter, Robert J. – Analytical Chemistry, 1988
Discusses the history and development of Plasma Desorption Mass Spectrometry to determine molecular weights and structures of proteins and polymers. Outlines theory, instrumentation, and sample preparation commonly used. Gives several examples of resulting spectra. (ML)
Descriptors: Biochemistry, Chemical Analysis, Chemistry, College Science
Peer reviewedCaldwell, Karin D. – Analytical Chemistry, 1988
Describes a technique for separating samples that range over 15 orders of magnitude in molecular weight. Discusses theory, apparatus, and sample preparation techniques. Lists several types of field-flow fractionation (FFF) and their uses: sedimentation FFF, thermal FFF, flow FFF, electrical FFF, and steric FFF. (ML)
Descriptors: Chemical Analysis, Chemistry, College Science, Electronic Control
