This research is intended to measure the quantity of urine in a nin's young second hand cigarette smoke exposure with barbituric acid (DBA) Direct read quantitative results, measured concentrations of co 2 standard 5, nin te, 15 ug/ml and 10 μ, respectively, by using a query, for example, the number of the original 46 group into two groups: a group of young people who smoke cigarettes and touch parents smoking of 28 items. 28 entries for measuring a substance in the standard nin Te concentration 2 (the lowest concentration that can be measured) and 15 ug/ml (maximum concentrations that can be monitored by the outcome has little bias). I found that there is a sensitivity. ....% And ... % Respectively. Study results showed that monitoring by means of quantitative DBA is reliable (but the result may not be clear if the urine samples had concentrations of less than 2, the new dimension by natam ug/ml), and when using cleaners DETBA. I found that the people who do not smoke have a te average nin.... Ug/ml and who smoke have a te average nin ...Ug/ml, so measuring cotinine This can be used to exclude smokers.
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