Determination of Pb, Cd and Cr in Surface Decorating Materials of Wood-Based Panels by Microwave Digestion-AAS
LONG Ling1, HUANG An-min1, MENG Di1, LU Zhi-gang2
1. Research Institute of Wood Industry, Chinese Academy of Forestry;Key Lab of Wood Science and Technology of State Forestry Administration, Beijing 100091, China 2. Jiangsu Entry-Exit Inspection and Quarantine Bureau, Nanjing 210001, China
Abstract：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 μg·mL-1, 0.029 μg·L-1 and 0.146 μg·L-1; respectively, the cadmium detection limit of GFAAS is 0.157 μg·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.
Key words：Microwave digestion;AAS;surface decorated materials of wood-based panels;Lead;Cadmium;Chromium
龙 玲1，黄安民1，孟 迪1，卢志刚2 . 微波消解-原子吸收光谱法测定人造板饰面材料中铅镉铬[J]. 光谱学与光谱分析, 2012, 32(09): 2572-2575.
LONG Ling1, HUANG An-min1, MENG Di1, LU Zhi-gang2 . Determination of Pb, Cd and Cr in Surface Decorating Materials of Wood-Based Panels by Microwave Digestion-AAS . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(09): 2572-2575.
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