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Khalafi, Lida; Doolittle, Pamela; Wright, John – Journal of Chemical Education, 2018
A laboratory experiment is described in which students determine the concentration and speciation of iron in beer samples using cloud point extraction and absorbance spectroscopy. The basis of determination is the complexation between iron and 2-(5-bromo-2- pyridylazo)-5-diethylaminophenol (5-Br-PADAP) as a colorimetric reagent in an aqueous…
Descriptors: Science Experiments, Laboratory Experiments, Science Laboratories, Chemistry
Undergraduate Laboratory Module for Implementing ELISA on the High Performance Microfluidic Platform
Giri, Basant; Peesara, Ravichander R.; Yanagisawa, Naoki; Dutta, Debashis – Journal of Chemical Education, 2015
Implementing enzyme-linked immunosorbent assays (ELISA) in microchannels offers several advantages over its traditional microtiter plate-based format, including a reduced sample volume requirement, shorter incubation period, and greater sensitivity. Moreover, microfluidic ELISA platforms are inexpensive to fabricate and allow integration of…
Descriptors: Undergraduate Students, Laboratory Experiments, Learning Modules, Program Implementation
Izadyar, Anahita; Kim, Yushin; Ward, Michelle M.; Amemiya, Shigeru – Journal of Chemical Education, 2012
The inexpensive and disposable electrode based on a double-polymer-modified pencil lead is proposed for upper-division undergraduate instrumental laboratories to enable the highly sensitive detection of perchlorate. Students fabricate and utilize their own electrodes in the 3-4 h laboratory session to learn important concepts and methods of…
Descriptors: Chemistry, Water, Plastics, Science Laboratories
Peer reviewed
Strohl, Arthur N. – Journal of Chemical Education, 1985
Provides procedures to measure the calcium concentration in fruit juice by atomic absorption. Fruit juice is used because: (1) it is an important consumer product; (2) large samples are available; and (3) calcium exists in fruit juice at concentrations that do not require excessive dilution or preconcentration prior to measurement. (JN)
Descriptors: Chemical Analysis, Chemistry, College Science, Higher Education