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Silverman, Julian R.; Hudson, Reuben – Journal of Chemical Education, 2020
Exciting developments in the field of Green Chemistry spur the continuous innovation of experiments in the teaching laboratory. Beyond learning practical techniques, students can critically assess experiments using relevant metrics to propose further improvements and identify the most important interconnected impacts of these alternative products…
Descriptors: Chemistry, Science Experiments, Science Instruction, Laboratory Experiments
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Brandriet, Alexandra; Holme, Thomas – Journal of Chemical Education, 2015
As part of the ACS Examinations Institute (ACS-EI) national norming process, student performance data sets are collected from professors at colleges and universities from around the United States. Because the data sets are collected on a volunteer basis, the ACS-EI often receives data sets with only students' total scores and without the students'…
Descriptors: Chemistry, Data Analysis, Error of Measurement, Science Tests
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Vogt, Frank – Journal of Chemical Education, 2011
Most measurement techniques have some limitations imposed by a sensor's signal-to-noise ratio (SNR). Thus, in analytical chemistry, methods for enhancing the SNR are of crucial importance and can be ensured experimentally or established via pre-treatment of digitized data. In many analytical curricula, instrumental techniques are given preference…
Descriptors: Measurement Techniques, Spectroscopy, Chemistry, Data Analysis
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Bachofer, Steven J. – Journal of Chemical Education, 2008
Sampling experiments utilizing field portable instruments are instructional since students collect data following regulatory protocols, evaluate it, and begin to recognize their civic responsibilities upon collecting useful data. A lead-in-soil experiment educated students on a prevalent exposure pathway. The experimental site was a pre-1950…
Descriptors: Chemistry, Sampling, Laboratory Experiments, Laboratory Equipment
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Spraggins, Jeffrey M., II; Williams, Theodore R. – Journal of Chemical Education, 2005
The thermal gravimetric analysis (TGA) data suggests that the quantity of volatile components in primary standards is less than 1% of the initial weight and differential scanning calorimetry (DSC) data shows that water present in the same chemicals is below the limit of detection of the instrumentation. This suggests that the 1-2 hour drying…
Descriptors: Chemistry, Standards, Evaluation Methods, Data Analysis
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Tellinghuisen, Joel – Journal of Chemical Education, 2005
Several data-analysis problems could be addressed in different ways, ranging from a series of related "local" fitting problems to a single comprehensive "global analysis". The approach has become a powerful one for fitting data to moderately complex models by using library functions and the methods are illustrated for the analysis of HCI-IR…
Descriptors: Goodness of Fit, Data Analysis, Models, Evaluation Methods