Proposes use of two experiments to sample and analyze contaminents in the laboratory. Experiments focus on estimating hydrogen sulfide levels in the general chemistry laboratory during qualitative analysis and determining the concentration of organic vapors associated with organic chemistry laboratories. (JN)

Provided are experiments to acquaint students with basic spectrophotometer components and their functions, to use the instrument in an openended-experiment, and to use Beer's Law in several different ways. In addition, the detectability (tolerance) of the spectrophotometer with visual detection limits is provided as an optional activity. (JN)

Background information, procedures, and results are provided for an experiment in which lead-210 is separated from bismuth-210 and polonium-210 by means of solvent extraction of their diethyldithiocarbamate complexes. The method involves a simple extraction procedure which allows complete separation of lead-210 from commercially available…

Although determination of phosphorus is important in biology, physiology, and environmental science, traditional gravimetric and colorimetric methods are cumbersome and lack the requisite sensitivity. Therefore, a derivative activation analysis method is suggested. Background information, procedures, and results are provided. (JN)

Background information, procedures, and results are provided for an experiment in which students: (1) construct an immobilized penicillinase electrode; (2) evaluate electron response as a function of penicillin concentration; and (3) study effects of solvent compositions, ionic strength, and equilibrium time upon electrode response. (JN)

Background, procedures, and results are provided for an experiment which examines, through electron spin resonance spectroscopy, complex species formed by cupric and 2,6-dihydroxybenzoate ions in aqueous solutions. The experiment is illustrative of several aspects of inorganic and coordination chemistry, including the identification of species…

In psychology, experimental studies are susceptible to the biases of the investigator in problem formulation, operationalization, sample selection, and data interpretation. Thus, what we regard as an objective, value-free approach to science is neither unbiased nor value-free. (GC)

Describes a set of laboratory experiments designed for a chemistry course revised for non-chemistry students. (MLH)

Describes an instrumental analysis experiment that utilizes spectrofluorimetry to determine as little as 0.02 percent glycine in commercial dietetic beverages. (MLH)

Describes the theory and performance of a diffusion experiment based on the free boundary method. Suitable for biochemistry and microbiology students taking physical chemistry. (MLH)

Describes a set of laboratory experiments that illustrate proteolytic enzyme action and specific properties of bromolain, including some insights into the active site mechanism of peptide hydrolysis. (MLH)

Describes two laboratory experiments involving metal ions and porphyrin ligands. (MLH)

Describes a technique by which room temperature phosphorescence of simple organic molecules can be demonstrated in the lecture hall or laboratory. (MLH)

Presents a kinetic study that utilizes a method for varying the concentrations of the possible Ce(IV) species and computing the concentration distribution of the sulfato and hydroxo species of Ce(IV). (MLH)

Describes several spectral experiments utilizing nuphthalene derivatives that display room-temperature phospharescence. (MLH)