In composition of cigarettes is not restricted quantity of dangerous substances
Researchers from University of Alicante (Spain) have studied composition of cigarettes of ten brands and have found out that concentration of some harmful and carcinogenic substances differs significantly in various brands. Legislation determines norms for nicotine, tar and carbon monoxide on each pack. With this manufacturer confirms that they don't exceed acceptable levels of dangerous substances. But norms are developed not for all harmful cigarettes' components.
Quantity of some substances is not always in proportion to toxicity level of many other compounds. Spaniards have analyzed gases and solid particles in cigarettes Marlboro, Winston, Chesterfield, Camel, L & M, Lucky Strike and John Player, Fortuna, Ducados and Nobel.
Especially have stood out levels of the following elements: isoprene, crotonaldehyde and toluol, that are one of the most carcinogenic. However, parameters of each brand have matched world parameters. Some harmful substances such as hydroquinone and cotinine differed from brand to brand.
Results have also shown that the lowest level of gaseous compounding is observed in cigarettes that don't have the lowest level of tar. It was also found out that isoprene, toluol and crotonaldehyde generation directly influences level of tar. I.e., it is not allowed to measure toxicity of cigarettes only by level of tar that it contains.
"Results should be considered carefully and as compared to data of other laboratories, although we have experimented with 200 cigarettes but figures can change in dependence of lot and ecological conditions", - the head of research has declared.
According to opinion of scientists, nicotine is not the most harmful substance in cigarette. To reduce number of toxic products in cigarettes, researchers have also tested and developed several catalysts. One of them reduces carbon monoxide emissions by 23 % and nicotine - more than by 40 %.