Locati G, Fantuzzi A, Consonni G, Li Gotti I, Bonomi G
Am Ind Hyg Assoc J. 1979 Jul;40(7):644-52. doi: 10.1080/15298667991430109.
Carbon blacks used in tire production have been examined for their polycyclic aromatic hydrocarbons (P.A.H.) content. The analytical procedures commonly adopted are discussed. The results obtained show that, A benzene extraction time of 250 hours is necessary to obtain complete extraction, but for practical purposes, an extraction time of 150 hours is sufficient to extract more than 95% of the PAH. It is possible to identify two classes of blacks in regard to extractables. The one class provides extractables in the range of 200--400 micrograms/g; the second class, in the range of 1000--2000 micrograms/g. No P.A.H. were detected by direct injection of carbon black into the mass spectrograph at 200 degrees C, 10(-6) torr. This was probably due to the very strong bonding to the black particles. The P.A.H. contribute a relative constant percentage of the benzene extracts. It is reasonably possible to exclude any carcinogenic risk to personnel, in a working environment, with an airborne carbon black concentration equal to or less than 3.5 mg/m3, due to the very low P.A.H. content of carbon black and to the very strong P.A.H. bonding to the black particles.
已对轮胎生产中使用的炭黑的多环芳烃（P.A.H.）含量进行了检测。讨论了通常采用的分析程序。所得结果表明，要获得完全萃取需要250小时的苯萃取时间，但实际应用中，150小时的萃取时间足以萃取出超过95%的多环芳烃。就可萃取物而言，可以识别出两类炭黑。一类可萃取物的含量范围为200 - 400微克/克；第二类的含量范围为1000 - 2000微克/克。在200摄氏度、10（-6）托的条件下将炭黑直接注入质谱仪中未检测到多环芳烃。这可能是由于其与炭黑颗粒的结合非常牢固。多环芳烃在苯萃取物中所占的百分比相对恒定。由于炭黑的多环芳烃含量极低且多环芳烃与炭黑颗粒的结合非常牢固，在工作环境中，当空气中炭黑浓度等于或低于3.5毫克/立方米时，合理地可以排除对人员的任何致癌风险。
