Environmental tobacco smoke (ETS) contains many toxic compounds which include substances classified as aldehydes (e.g. formaldehyde) and inorganic substances such as cyanide ions. The information on the determination of these compounds in water is available, but the monitoring data on the level of these substances in human body fluids are still lacking. In this work the procedure for determining cyanide ions and formaldehyde in samples of human nasal discharge by simple spectrophotometric technique is presented.
 I. Demkowska, Ż. Polkowska, J. Namieśnik, Pol. J. Environ. Study. 19, 573 (2010)
 S. Chung, L. Baker, P. Jenkins, D. Julian, S. Lum, L. Miyasato, J. Polakoff, D. Shimer, B. Takemoto, B. Winder, State of California, Air resources board, appendix III, Proposed identification of environmental tobacco smoke as a toxic air contaminant, part A-Exposure assessment, As Approved by the Scientific Review Panel On June 2, (2005), (available on: http://www.arb.ca.gov/regact/ets2006/app3parta.pdf, 10.09.2012)
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