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Comment on 'Measurement Error and Spatial Variability Effects on Characterization of Volatile Organics in the Subsurface'

机译：评论“测量误差和空间变异性对地下挥发性有机物表征的影响”

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SIR: The introduction of the recent paper by West et al. (1) notes that "The accurate characterization of VOC spatial distributions depends on the accuracy of the discrete measurements and the density of their locations at the site". Clearly, this statement could be made for any contaminant, but it poses especially severe problems when the contaminants are volatile organic compounds (VOCs). The usual process of collecting relatively few samples for later analysis off-site introduces major uncertainties with VOCs due to their susceptibility to large and highly variable losses during sampling, storage, subsampling, and analysis (2-7). West et al. suggest that on-site methods of VOC determination may provide equal or greater accuracy than off-site methods, and we agree that such potential exists. Implicit in the requirement for improved accuracy is the need for acceptable precision.
机译：SIR：West等人介绍了最近的论文。 （1）指出“ VOC空间分布的准确表征取决于离散测量的精度及其在现场的位置密度”。显然，可以针对任何污染物做出此陈述，但是当污染物是挥发性有机化合物（VOC）时，它将构成特别严重的问题。由于挥发性有机化合物在采样，存储，二次采样和分析过程中易受较大且高度可变的损失的影响，通常收集相对较少的样本以供非现场分析的常规过程会带来很大的不确定性（2-7）。韦斯特等。这表明现场挥发性有机化合物的测定方法可以提供比非现场方法相同或更高的准确性，我们同意存在这种潜力。对提高精度的要求隐含着对可接受精度的要求。

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