Đo chất gây ô nhiễm trong nhà Đo lường chất gây ô nhiễm được thực hiện trong hầu hết các, nếu không phải tất cả, điều tra tiến hành để đánh giá tiềm năng mối quan hệ nhân quả giữa các bệnh hoặc triệu chứng bệnh tật và môi trường xây dựng khu dân cư và nonresidential. Đo lường chất gây ô nhiễm có thể bao gồm lấy mẫu của nồng độ trong không khí / hơi hoặc chất hạt-giai đoạn, lấy mẫu của các chất gây ô nhiễm trong không khí sinh học, lấy mẫu bề mặt, và lấy mẫu. | chapter nine Measurement of indoor contaminants Contaminant measurements are made in most if not all investigations conducted to evaluate potential causal relationships between illness or illness symptoms and residential and nonresidential building environments. Contaminant measurements may include sampling of airborne concentrations of gas vapor or particulate-phase substances sampling of airborne biological contaminants surface sampling and bulk sampling of building materials. Contaminant measurements are made for various reasons. In the case of carbon dioxide CO2 they are used to determine the adequacy of ventilation in other cases they may be used as a screening tool to determine whether target contaminants are within or above acceptable guideline values. The best reason to conduct contaminant measurements in problem buildings is to identify and confirm the presence of contaminants that may be causally associated with reported illness symptoms. In the case of carbon monoxide CO measurements of COHb in blood may be used to confirm a CO exposure and its magnitude. Contaminants that may pose long-term health exposure risks . radon may also be measured. I. Measurement considerations It is important when conducting environmental measurements in indoor environments that investigators are familiar with principles and practices associated with such measurements and conduct these activities with specific objectives in mind. Contaminant concentrations are determined from samples that have been collected. 2001 by CRC Press LLC A. Sampling In sampling one attempts to identify or determine the concentration of a substance or substances in a relatively small volume of indoor air or human blood on a limited surface area or in a small mass of material. For purposes of contaminant identification and quantification a sample is assumed to be representative of a larger volume of air . room blood or material surface or mass. This assumption when used in conjunction with an .
