ERIC Number: EJ1188401
Record Type: Journal
Publication Date: 2018-Aug
Pages: 5
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-0021-9584
EISSN: N/A
Modified Siwoloboff-Wiegand Procedure for the Determination of Boiling Points on a Microscale
Troyer, Timothy L.; Mounsey, Kristen R.; King, William J.; Givens, Laura M.; Hutton, Jessica A.; Benges, Melissa Hood; Whitlatch, Kindra N.; Wagoner, Jacob D.
Journal of Chemical Education, v95 n8 p1406-1410 Aug 2018
Developing simpler, more accessible, and more affordable methods for the determination of the boiling point of microscale amounts of liquid may lead to increased utilization in research and teaching laboratories as an analytical technique. Our efforts toward that goal have revealed that digital hot plates can be used as the heat source. One option is to simply use a test tube and a digital thermometer, requiring 300 µL of liquid that accurately determines boiling points that range from 35 to 150 °C. An alternative method, requiring as little as 30 µL of liquid, utilizes a modified aluminum block and a temperature control probe coupled to the digital hot plate that results in the accurate determination of boiling points that range from 35 to 205 °C. Both modifications to the Siwoloboff-Wiegand method provide consistent, reliable, and accurate boiling points for a variety of liquids with a wide range of boiling points.
Descriptors: Science Instruction, Science Laboratories, Hands on Science, Chemistry, Laboratory Equipment, Heat
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A