Statistical Comparison of Analysis Results for Lead on Dust Wipe Samples by X-ray Fluorescence Analysis and Flame Atomic Absorption Spectrometry

John W Rogers, S. Viet, S. Roda, A. Fraser, W. Friedman, Joey Tianyi Zhou, D. Jacobs
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引用次数: 2

Abstract

The traditional method of determining dust lead loading (mass per unit area) on surfaces is to send dust wipe samples to a laboratory for analysis, and typically it takes one or more days to obtain results. Field-portable techniques taking 10 to 15 min for dust wipe lead analysis have been developed but need to be further evaluated. Dust wipe samples (n = 878) collected from a nationally representative sample of child care centers were tested by means of x-ray fluorescence (XRF) analysis with two XRF analyzer instrument models and subsequently analyzed for lead using flame atomic absorption spectrometry (FAAS). Samples were collected from floors and interior window sills and included blank and spiked quality control samples. Weighted linear regression was used to model the relationship between XRF and FAAS measurements. The correlations between FAAS and XRF measurements exceeded 0.80 (p
x射线荧光分析与火焰原子吸收光谱法测定擦尘样品中铅的统计比较
测定表面上灰尘铅负荷(单位面积质量)的传统方法是将灰尘擦拭样品送到实验室进行分析,通常需要一天或多天才能获得结果。已经开发了现场便携式技术,只需10至15分钟即可进行灰尘擦拭铅分析,但需要进一步评估。从全国具有代表性的托儿中心样本中收集的灰尘擦拭样品(n = 878)通过两种XRF分析仪仪器模型进行x射线荧光(XRF)分析,随后使用火焰原子吸收光谱法(FAAS)分析铅。从地板和室内窗台上采集的样本包括空白和加标的质量控制样本。采用加权线性回归对XRF和FAAS测量值之间的关系进行建模。原子吸收光谱和XRF测量值之间的相关性超过0.80 (p
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