Grover Brett D, Eatough Norman L, Woolwine Woods R, Eatough Delbert J, Cary Robert A
Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602, USA.
J Air Waste Manag Assoc. 2009 Aug;59(8):1007-17. doi: 10.3155/1047-3289.59.8.1007.
Semi-volatile organic carbonaceous material (SVOC) in fine particles is not reliably measured with conventional semicontinuous carbon monitors because semi-volatile carbonaceous material is lost from the collection media during sample collection. Two modifications of a Sunset Laboratory carbon aerosol monitor allowing for the determination of semi-volatile fine particulate organic material are described. Collocated conventional and modified instruments were operated simultaneously using a common inlet. Comparisons were made with integrated PC-BOSS data for quartz filter retained nonvolatile organic carbon (NVOC) and elemental carbon (EC), SVOC, and total carbon (TC = SVOC + NVOC + EC) and good agreement was observed between TC concentrations during studies conducted in Rubidoux, CA. Precision of the comparison was sigma = +/-1.5 microg-C/m3 (+/-8%). On the basis of experiments performed with the modified Sunset monitor, a dual-oven Sunset monitor was developed and extensively tested in Lindon, UT; Riverside, CA; and in environmental exposure chambers. The precision for the measurement of TC with the dual-oven instrument was sigma = +/-1.4 microg-C/m3 (+/-13%).
细颗粒物中的半挥发性有机碳质材料（SVOC）无法用传统的半连续碳监测器可靠测量，因为在样品采集过程中，半挥发性碳质材料会从采集介质中损失。本文描述了对Sunset实验室碳气溶胶监测器的两种改进方法，可用于测定半挥发性细颗粒有机材料。使用共同的入口同时运行并置的传统仪器和改进仪器。将其与集成的PC-BOSS数据进行比较，以分析石英滤膜上保留的非挥发性有机碳（NVOC）、元素碳（EC）、SVOC和总碳（TC = SVOC + NVOC + EC），在加利福尼亚州鲁比杜克斯进行的研究中，观察到TC浓度之间具有良好的一致性。比较的精度为σ = +/-1.5μg-C/m³（+/-8%）。基于使用改进后的Sunset监测器进行的实验，开发了双炉Sunset监测器，并在犹他州林登、加利福尼亚州里弗赛德以及环境暴露室进行了广泛测试。使用双炉仪器测量TC的精度为σ = +/-1.4μg-C/m³（+/-13%）。
