A mass spectrometer for continuous analysis of gaseous compounds excreted by human skin

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Abstract
A mass spectrometer was used to measure the excretion of CO2, He, and Ar by the human skin, during and after respiration of normal air and a mixture of O2 and He or Ar, respectively. The time delay and the intensity of the excretion were determined at several places of the body. In one subject sites of maximum excretion of CO2 were axillae andforehead, and with helium the front of the neck and chest were added to these sites. A comparison of rates of excretion of argon and helium showed that these rates were proportional to the expected diffusion coefficients of these gases.

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