A Modified Microburet for Microscale Titration

Singh, Mono M.; McGowan, Cynthia; Szafran, Zvi; Pike, Ronald M.

doi:10.1021/ed075p371

Cited by 9 publications

(7 citation statements)

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“…The construction and use of a microscale buret for microscale titration (15) and a microscale pycnometer for density determination (16 ) provide other good examples of pollution prevention. By using 2-mL microburets instead of 50-mL burets, microscale titrations can be carried out using only 4% of the traditional amounts of chemicals.…”

Section: Pollution Preventionmentioning

confidence: 99%

See 1 more Smart Citation

Microscale Chemistry and Green Chemistry: Complementary Pedagogies

Singh¹,

Szafran²,

Pike³

1999

J. Chem. Educ.

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Microscale chemistry is a laboratory-based, environmentally safe, pollution-prevention approach accomplished by using miniature glassware and significantly reduced amounts of chemicals. Microscale chemistry can be implemented without compromising educational standards or analytical rigor, and its techniques are amenable to industrial R&D applications. Since its modest beginning at three institutions in the early 1980s (Bowdoin College, Merrimack College, and Brown University), microscale chemistry has experienced a rapid growth in the U.S. and around the world. The extent of proliferation of this technique can be judged from numerous publications in this Journal.Originally, microscale chemistry was introduced in the organic chemistry laboratory at Bowdoin College, Maine. It was later expanded to cover general, inorganic, analytical, and environmental chemistry. The National Microscale Chemistry Center was established at Merrimack College in 1992-1993 as the first center to offer formal microscale chemistry training to teachers and chemists at all levels from elementary school to university.Green chemistry (1-3) is a relatively new initiative undertaken by the U.S. Environmental Protection Agency, Washington, DC, in collaboration with the ACS and the Green Chemistry Institute, MD. The simplest definition of green chemistry is "the use of chemistry techniques and methodologies that reduce or eliminate the use or generation of feedstocks, products, by-products, solvents, reagents, etc., that are hazardous to human health or the environment" (2). While more commonly being used in industrial applications, the concepts of green chemistry can also be incorporated into educational pedagogy, which argues for the adoption of microscale laboratory methods in teaching institutions. To recognize the impact of green chemistry on the environment, several awards, such as the Kenneth G. Hancock Green Chemistry Memorial Scholarship and the Presidential Green Chemistry Challenge Awards have been instituted (see EPA's award announcement: www.epa.gov/docs/gcc).Microscale chemistry is a laboratory-based green chemistry approach. In green chemistry, the laboratory product, rather than being the industrial 10,000 lb/h of ethyl benzene, is the understanding of the chemistry behind a particular reaction. The application of green chemistry-microscale chemistry to this laboratory product would then be a modification of the reagents, solvents, experimental methodology, and/or products to allow the gaining of this knowledge with the minimum hazard to human health or the environment. A chemist trained in this way will have a significant impact on the solution of problems related to the environment. In this paper we report on the compatibility of microscale chem-istry and green chemistry pedagogic programs: their benefits and impact on academia and industry.We will examine each of the fundamental aspects of green chemistry pedagogy (3b), with examples from microscale experiments performed at our center.

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Section: Pollution Preventionmentioning

confidence: 99%

“…The precision of the microburet is the same as of the buret, and the smaller delivered volume allows multiple runs to be performed in the same amount of time. This results in greater experimental accuracy (17 ). Moreover, microscale burets are made from graduated pipets, which are relatively inexpensive.…”

Section: Pollution Preventionmentioning

confidence: 99%

Microscale Chemistry and Green Chemistry: Complementary Pedagogies

Singh¹,

Szafran²,

Pike³

1999

J. Chem. Educ.

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show abstract

“…In analytical chemistry, many titrations are performed routinely. We have developed an improved microscale buret, whose construction and use were described previously in this Journal (1). In this paper, the use of a microburet in general and analytical chemistry will be illustrated by results from acid-base, oxidation-reduction, precipitation, complexometric, and pH titrations.…”

mentioning

confidence: 99%

A Comparative Study of Microscale and Standard Burets

Singh¹,

McGowan²,

Szafran³

et al. 2000

J. Chem. Educ.

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“…For instance, teachers made microburets for microscale titrations by using standard pipets. 5,6 Therefore, teachers were able to begin adapting traditional experiments at their schools immediately after the workshop. More information about the techniques covered during this workshop can be obtained from the Microscale Chemistry Center (see author biographies for further information).…”

Section: Microscale Chemistry Pilot Programmentioning

confidence: 99%