Gary (Consultant, Monterey, California, USA) Nelson 
Gas Mixtures [PDF ebook] 
Preparation and Control

Gas Mixtures provides practical suggestions and calculations for producing multicomponent test gas atmospheres. General topics addressed include sorbent evaluation, methods development, dosimeter testing, instrument calibration, atmospheric simulation, and gas analysis. Learn the tricks of the trade for producing gas mixtures over a wide range of concentrations using even the most difficult-to-handle materials.
Gas Mixtures is a must for industrial hygienists, air pollution control specialists, analytical chemists, and others working in such areas as health and safety, air pollution, air cleaning, and respirator and carbon research.