XRFS Determination of Trace Elements in Bitumen
摘 要
提出了粉末压片制样-X射线荧光光谱法测定沥青中17种微量元素。将粒径小于180 μm沥青粉末经60 ℃烘干后置于模具中,以20 MPa压力制成厚度为4 mm的样片。选用B-401~B-408沥青标准物质作为校准样品,并建立了集校准曲线、基体校正及谱线重叠校正为一体的回归方程作为方法的定量基础。求得方法的检出限0.2~18 μg·g-1。用同一沥青样品重复测定11次,测得其相对标准偏差小于9.5%。方法用于沥青校正物质(B-403)分析,所得结果与标准值相符。
Abstract
XRFS determination of 17 trace elements in bitumen with preparation of disc sample by direct pressing of sample powder was proposed in this paper. The bitumen was powdered to size less than 180 μm, dried at 60 ℃ and pressed in a mould under a pressure of 20 MPa to form a disc sample with its thickness of 4 mm. Working curve was prepared with a set of standard samples (B-401 to B-408). A 3 in 1 regression equation functioning as working curve, matrix correction and spectral overlapping correction was established and used as the basis for quantification. Detection limits of the method was found to be in the range of 0.2-18 μg·g-1. Values of RSD′s (n=11) were found to be less than 9.5% by analysis of a bitumen sample. The proposed method was used in analyzing a standard sample (B-403), giving results in consistency with the standard values.
中图分类号 O657.34
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收稿日期 2010/11/6
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备注张爱芬(1963-),女,河南孟州人,高级工程师,主要从事化学X射线荧光光谱分析工作。
引用该论文: ZHANG Ai-fen,YAO Yao,MA Hui-xia,CAO Hui-jun. XRFS Determination of Trace Elements in Bitumen[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2011, 47(11): 1333~1336
张爱芬,姚瑶,马慧侠,曹慧君. X射线荧光光谱法测定沥青中痕量元素[J]. 理化检验-化学分册, 2011, 47(11): 1333~1336
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【3】齐宏军.石油焦灰分中金属含量的测定[J].渤海大学学报:自然科学版, 2005,26(4):320-322.
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【6】李敬清,康蕴天.微波消解-ICP-AES测定石油焦中硫[J].光谱实验室, 2001,18(5):671-673.
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【10】吉昂,陶光仪,卓尚军,等.X射线荧光光谱分析[M].北京:科学出版社, 2003:159.
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