A gas mixture cylinder was connected to a Fourier Transform Infrared (FTIR) Spectrometer to purge residual carbon dioxide and water vapor. A staff member was preparing to use the FTIR instrument. Prior to use of the instrument, it must be purged with dry nitrogen to remove residual carbon dioxide and water vapor. When the gas mixture reached the instrument's globar (resistively heated ceramic) heat source, a localized explosion occurred. No injuries resulted from the explosion but the spectrometer housing was heavily damaged. The internal components, including the optics and computer hardware, appeared to be in good shape.

A mixture of hydrogen and nitrogen was inadvertently connected for the purging rather than dry nitrogen. The staff member, even though an expert in the view more

A researcher was using numerous compressed gases in his lab. To facilitate reconfiguring his experimental apparatus, he installed "quick-disconnect" fittings on flexible tubing connected to his compressed gas cylinders/regulators. He also fitted all of the equipment that needed gas with complementary "quick-disconnect" fittings.

The day of the incident, he needed to purge his IR spectrometer with nitrogen as the element heated up. He mistakenly attached the "quick-disconnect" fitting from a cylinder of 10% nitrogen and 90% hydrogen to the "quick-disconnect" fitting on his spectrometer. As soon as the gas started flowing and he switched on the element, the instrument exploded, completely destroying a $6,000 piece of equipment. Only minor view more