Discusses the theory and experimental procedures for using Young's eriometer to determine the diameters of blood corpuscles, lycopodium powder, and wool fibers. (CC)

Describes two formulas for calculating errors due to instrument limitations which are usually found in gravimetric volumetric analysis and indicates their possible applications to other fields of science. (CC)

Major instrumental concerns in molecular solution fluorimetry have recently turned away from sensitivity enhancement to an orientation more directed toward selectivity. This trend simply recognizes that such methodology has historically been blank limited. Thus, the described uses of liquid chromatography, line narrowing, and time resolution…

Describes laboratory workstations which provide direct connection for monitoring and control of analytical instruments such as pH meters, spectrophotometers, temperature, and chromatographic instruments. This is accomplished through analog/digital and digital/analog converters for analog signals and input/output devices for on/off signals.…

Photochemical data are presented to indicate how use of sensitizing dyes extends the spectral range to which the substrate semiconductor is sensitive. Data demonstrate that specific energetic requirements exist for a dye to be an effective sensitizer. Also shows how photooxidation is increased by increasing surface concentration of the dye. (JN)

Describes a simple, relatively inexpensive, and easily implemented approach for introducing visually handicapped students to chemical instrumentation via experiments on operational amplifiers as examples of some of the electronic building blocks of chemical instrumentation. The approach is applicable to other chemical instruments having electrical…

Describes interactive, computer-graphics program emulating behavior of high resolution, ultraviolet-visible analog recording spectrophotometer. Graphics terminal behaves as recording absorption spectrophotometer. Objective of the emulation is study of optimization of the instrument to yield accurate absorption spectra, including…