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.
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