Determination Methods Of Harmful Elements In Cigarette Materials

With increase concern and attention on environmental protection and health, the cigarette industry promulgated the restrictive standards that strengthen detection and control for toxic and hazardous materials in 2007. One of the mandatory targets in the state and industry standard is that concentrations of lead (Pb), arsenic (As), mercury (Hg), chromium (Cr), cadmium (Cd), and Nickel (Ni) must beloe the limits in the standard, and the state agencies will sample and detect on a regular basis. However, most of the relevant methods reference for test methods in food that have not been clearly restricted so that the test results are greatly affected by different treatment. Therefore, it's particularly important to establish accurate, sensitive and efficient testing methods so that routine supervision and inspection of quality accessories can be conducted to prevent risks of low quality of products due to the low quality of accessories in time.According to the characteristics of each detection method, based on the existing standard methods for As, Pb, Cd, Cr, and Ni in food additives and the detection method is used in the tobacco industry, a toxic and a relatively simple, accurate and sensitive and efficient test methods for harmful elements determinant in cigarette auxiliary materials is studied in the paper. The study was carried out pre-treatment and detection methods. Pretreatment samples by microwave digestion and traditional wet digestion, and then As content determined by hydride-atomic fluorescence spectrometry (HG-AFS) and Pb, Cd, Cr, Ni content tested by graphite furnace atomic absorption spectrometry (GF-AAS).The tipping paper, cigarette flavors and essence, triacetin and white glue were chosen for the typical study targets. The results show that it's complete digestion for tipping paper by microwave digestion with HNO3:HF:HCl:H2O2= 6:0.2:1:1, and for cigarette flavors and essence, triacetin and white glue by traditional wet digestion with HNO3:HCl:H2O2= 5:1:2. And they are all the appropriate pretreatment method because of digestion complete, effective, feasible, with high accuracy and precision.A standard method for trace amount determination of arsenic in cigarette auxiliary materials, pretreated with microwave digestion and traditional wet digestion, by HG-AFS is developed. Under the optimum conditions, there was a good linear relationship between the fluorescence intensity and arsenic concentration in the range of 0-20μg/L with a correlation coefficient of 0.9996, while the detection limit of the method was 1.38 ng/L and the lower limited quantification for As determination was 0.36μg/L. The recovery rates of arsenic were ranged from 98%to 110%. It is suitable for the determination of trace arsenic elements. The determination of harmful elements Pb, Cd, Cr, and Ni in cigarette auxiliary materials was studied by GF-AAS. The relative standard deviations (RSD) were less than 10%. The recoveries of the 4 elements were from 94%to 105%, and the limits of detection were from 0.036 to 1.381 ug/L. By comparison of different testing organizations test results show that the results of the same sample in different laboratories have good reproducibility.Consequently, they are suitable for the determination of trace harmful elements in cigarette auxiliary materials, large quantities of sample testing, due to simple, convenient and meet industry technical standards, and laid a good development of technical guidelines for the security of Hunan cigarette auxiliary.