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The Gravimetric Analysis of Nickel Using a Microwave Oven

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Nadia Carmosini , Sanaz Ghoreshy and Marina C. Koether

Department of Chemistry, Northeastern Illinois University, 5500 N. St. Louis Ave., Chicago, IL 60625-4699

J. Chem. Educ., 1997, 74 (8), p 986

DOI: 10.1021/ed074p986

Publication Date (Web): August 1, 1997

Abstract

The procedure for the gravimetric quantitative analysis of the percent of nickel in steel has been modified to include the use of a microwave oven. Experiments performed with the microwave oven gave an average recovery of 99.9+0.3% whereas the conventional method gave a value of 99.5+0.6%. The Ni(DMG)₂ samples, which were digested and dried in the microwave oven, showed no physical difference indicating that there was no chemical modification of the precipitate due to the microwave radiation. The microwave oven proved to be very useful for time efficiency, not only for the digestion and heating of the steel ore, but also for the drying of the ore, the crucibles, and the Ni(DMG)₂ precipitate. The most significant advantages occur with the cooling time. However, it is not suggested that the entire experiment be performed with the microwave since constant attention, which is required with the microwave drying method, is not necessary for the conventional oven method. Therefore, in order to be more time effective, thought should be given as to which part of the method should be performed with the microwave and which should be performed with the conventional oven.

Keywords (Audience):

Second-Year Undergraduate

Keywords (Domain):

Analytical Chemistry

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Gravimetric Analysis

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This article has been cited by 2 ACS Journal articles (2 most recent appear below).

Teaching Sample Preparation in the Undergraduate Laboratory
Ed Segstro , Douglas M. Goltz , Tara Hall and Andrew Grant
Journal of Chemical Education2000 77 (11), 1486
- Teaching Sample Preparation in the Undergraduate Laboratory
  Ed Segstro , Douglas M. Goltz , Tara Hall and Andrew Grant
  Journal of Chemical Education2000 77 (11), 1486
  Teaching sample preparation in an undergraduate analytical chemistry laboratory provides many challenges. For example, the time required to properly digest a sample means that sample preparation and method development are often deliberately overlooked in ...
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Using Microwave Sample Decomposition in Undergraduate Analytical Chemistry
R. Griff Freeman and David L. McCurdy
Journal of Chemical Education1998 75 (8), 1033
- Using Microwave Sample Decomposition in Undergraduate Analytical Chemistry
  R. Griff Freeman and David L. McCurdy
  Journal of Chemical Education1998 75 (8), 1033
  A shortcoming of many undergraduate classes in analytical chemistry is that students receive little exposure to sample preparation in chemical analysis. This paper reports the progress made in introducing microwave sample decomposition into several ...
  Abstract | Hi-Res PDF | PDF w/ Links