This HND piece examines the matter of interferences in the chemical analysis of air contaminants. Some historical background is provided, including how our EPA formalized measurement techniques, and the approved methods promulgated by NIOSH and OSHA.
Then, examples are given. We discuss the effect of other reduced sulfur compounds on hydrogen sulfide analysis, along with how formaldehyde in cigarette smoke threw off the CDC testing on the FEMA trailers. As always, there are useful links throughout the write-up.
Read the complete article.