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A Novel Approach to Surrogate and Matrix Spiking Ambient Air Samples for EPA Methods TO-14A and TO-15

机译:用于EPA方法的替代和基质掺入环境空气样本的新方法 - 14A和15

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Surrogate and matrix spiking is a routine part the quality control program in USEPA Methodologies for the analysis of water and soil samples. Recovery information from surrogate and matrix spiking of field samples yields valuable insight into the accuracy of the instrumental analysis and identify possible sample matrix interactions with the target compounds. Currently, the EPA has two methods for analysis of volatile organic compounds in ambient air collected in specially prepared canisters, Methods TO-14A and TO-15. Method TO-14A has little to no QC guidance where as Method TO-15 has more stringent criteria. However, neither method requires surrogate or matrix spiking as a part of its QC criteria. Important information about the instrumental analysis, sample matrix interactions, and sample train integrity could be derived from spiking ambient air samples. This study was done to investigate the viability of surrogate and matrix spiking of ambient air samples collected in SilcoCansò and SUMMAò canisters, identify some of the problems, and develop a spiking procedure. For the study, the surrogate compounds include Toluene-d8 and 1,4-Dichlorobenzene-d4. The matrix spiking compounds are 1,1-Dichloroethene, Trichloroethene, Benzene, Toluene, and Chlorobenzene.
机译:替代和矩阵尖峰是常规部分的使用PA方法中的质量控制程序,用于分析水和土壤样品。来自替代物和矩阵尖峰的恢复信息野外样品产生有价值的洞察力识别仪器分析的准确性,并鉴定与目标化合物的可能的样品基质相互作用。目前,EPA有两种用于分析在专门制备的罐中收集的环境空气中的挥发性有机化合物,方法为-14a和-15。方法到14A几乎没有QC引导,其中AS方法到-15具有更严格的标准。然而,既不需要代理或矩阵尖峰作为其QC标准的一部分。关于仪器分析的重要信息,样品基体的相互作用,以及样品列车完整性可从尖峰环境空气样品中得到。本研究进行了研究,探讨替代物和基质尖峰在淤煤和Summaò罐中收集的环境空气样本的可行性,识别一些问题,并开发尖峰手术。对于研究,替代化合物包括甲苯-D8和1,4-二氯苯-D4。基质尖峰化合物是1,1-二氯乙烯,三氯乙烯,苯,甲苯和氯苯。

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