油漆、油墨中Pb、Cd、Cr(Ⅲ)、Cr(Ⅵ)含量测定

Analysis of Pb,Cd,Cr(Ⅲ), Cr(Ⅵ) Contents in Ink and Paints

  • 摘要: 建立了1种检测油漆、油墨中Pb、Cd、Cr(Ⅲ)、Cr(Ⅵ)含量的方法. 用电感耦合等离子体发射光谱法(ICP-AES)测定其中的铅、镉、总铬含量,方法的精密度小于6%,加标回收率为96.2%~100.2%. 用二苯碳酰二肼分光光度法测定Cr(Ⅵ),其方法的加标回收率为80.0%~90.0%. X射线光电子能谱法(XPS)分析油墨中铬的形态主要为三价. 实验结果表明:油墨中Pb含量低于0.20 mg/kg,Cd含量低于0.04 mg/kg,Cr(Ⅵ) 含量低于2.00 mg/kg;油漆中Cd含量低于6.0

     

    Abstract: A method for the determination of Pb, Cd, Cr(Ⅲ), Cr(Ⅵ) in paints and ink is developed. The contents of Pb, Cr, Cd in Paints and ink were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). The precision of the method was less than 6% and the recovery rates were between 96.2%~100.2%. The contents of Cr(Ⅵ) in paints and ink were determined by diphenylcarbazide spectrophotometry. The spiket recovery rate was between 80.0%~90.0%. X-ray photoelectron spectroscopy results showed that chromium in ink is the trivalent chromium. Experimental results showed that the elements in ink were: Pb<0.2 mg/kg, Cd<0.04 mg/kg, Cr(Ⅵ)<2.00 mg/kg. All contents of cadmium in paints were less than 6.00 mg/kg which accorded with ASTM F963-2011, the Ameriscan Standard for toy products. The contents of lead in 6 paints were more than 90 mg/kg. The content of Cr(Ⅵ) in one paint was up to 1.33×104 mg/kg not accorded with that of ASTM F963-2011. The detection limits of Pb、Cd、Cr(Ⅵ) were 0.04,0.2,2.0 mg/Kg.

     

/

返回文章
返回