Long Ling, Huang An-Min, Meng Di, Lu Zhi-Gang
Research Institute of Wood Industry, Chinese Academy of Forestry, Key Lab of Wood Science and Technology of State Forestry Administration, Beijing 100091, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2012 Sep;32(9):2572-5.
With microwave-digestion as a sample decomposition technique and HNO3 and H2O2 as digestion reagent, the contents of Pb, Cd and Cr in surface decorating materials of wood-based panels were determined by atomic absorption spectrometry. The detection limit of Pb, Cd and Cr of FAAS is 0.12 microg x mL(-1), 0.029 microg x L(-1) and 0.146 microg x L(-1); respectively, the cadmium detection limit of GFAAS is 0.157 microg x L(-1). The precision of lead was between 0.8% and 3.0% and the recoveries ranged from 94% to 109.2%. The precision of cadmium was between 0.8% and 2.1%, and the recoveries ranged from 94.6% to 106.4%. The precision of chromium was between 1.8% and 4.9%, and the recoveries ranged from 98.8% to 107.7%. The method is accurate and reliable, and suitable and applicable to determining heavy metal of surface decorating materials of wood-based panels. The result is expected to provide scientific basis for establishing a corresponding Chinese national standard.
以微波消解作为样品分解技术，以硝酸和过氧化氢作为消解试剂，采用原子吸收光谱法测定人造板表面装饰材料中铅、镉和铬的含量。火焰原子吸收光谱法（FAAS）测定铅、镉和铬的检出限分别为0.12μg·mL⁻¹、0.029μg·L⁻¹和0.146μg·L⁻¹；石墨炉原子吸收光谱法（GFAAS）测定镉的检出限为0.157μg·L⁻¹。铅的精密度在0.8%至3.0%之间，回收率在94%至109.2%之间。镉的精密度在0.8%至2.1%之间，回收率在94.6%至106.4%之间。铬的精密度在1.8%至4.9%之间，回收率在98.8%至107.7%之间。该方法准确可靠，适用于测定人造板表面装饰材料中的重金属。该结果有望为制定相应的中国国家标准提供科学依据。
