光谱学与光谱分析, 2012, 32 (9): 2572, 网络出版: 2012-09-26  

微波消解-原子吸收光谱法测定人造板饰面材料中铅镉铬

Determination of Pb, Cd and Cr in Surface Decorating Materials of Wood-Based Panels by Microwave Digestion-AAS
作者单位
1 中国林业科学研究院木材工业研究所, 国家林业局木材科学与技术重点试验室, 北京 100091
2 江苏出入境检验检疫局, 江苏 南京 210001
摘要
用微波消解作为样品前处理, 选择硝酸和过氧化氢为消解试剂, 用火焰原子吸收法和石墨炉原子吸收法, 可测定三聚氰胺浸渍胶膜纸、 聚氯乙烯(PVC)薄膜、 漆膜等人造板饰面材料中的铅、 镉、 铬元素含量。 火焰原子吸收法的铅、 镉、 铬元素检出限分别为0.12, 0.020 9和0.146 μg·mL-1; 石墨炉原子吸收法的镉元素检出限为0.157 μg·L-1。 铅元素相对标准偏差为0.8%~3.0%, 加标回收率为94%~109.2%; 镉元素相对标准偏差为0.8%~2.1%, 加标回收率为94%~106.4%; 铬元素相对标准偏差为1.8%~4.9%, 加标回收率为98.8%~107.7%。 方法准确可靠, 适用于人造板饰面材料中重金属的分析, 可为制定相关检测方法标准提供依据。
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.

龙玲, 黄安民, 孟迪, 卢志刚. 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(9): 2572. LONG Ling, HUANG An-min, MENG Di, LU Zhi-gang. Determination of Pb, Cd and Cr in Surface Decorating Materials of Wood-Based Panels by Microwave Digestion-AAS[J]. Spectroscopy and Spectral Analysis, 2012, 32(9): 2572.

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