title: [Determination of Pb, Cd and Cr in surface decorating materials of wood-based panels by microwave digestion-AAS].
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 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.
authors.affiliation: Research Institute of Wood Industry, Chinese Academy of Forestry, Key Lab of Wood Science and Technology of State Forestry Administration, Beijing 100091, China. longling@caf.ac.cn
authors.forename: Ling
authors.initials: L
authors.lastname: Long
authors.forename: An-Min
authors.initials: AM
authors.lastname: Huang
authors.forename: Di
authors.initials: D
authors.lastname: Meng
authors.forename: Zhi-Gang
authors.initials: ZG
authors.lastname: Lu
mesh_terms: D002104:Cadmium / Q000032:analysis*; D002857:Chromium / Q000032:analysis*; D006861:Hydrogen Peroxide; D007854:Lead / Q000032:analysis*; D057230:Limit of Detection; D019216:Metals, Heavy; D008872:Microwaves; D013054:Spectrophotometry, Atomic; D014934:Wood
chemical_list: D019216:Metals, Heavy; D002104:Cadmium; D002857:Chromium; D007854:Lead; D006861:Hydrogen Peroxide