Chemical contamination is ubiquitou

化学污染在室内环境中无处不在，但是测量选择通常在研究之外受到限制。对于甲醛（一种已知的致癌物和刺激物）尤其如此。该项目的目的是开发一种新颖的筛查工具：基于智能手机的应用程序，可以与低成本比色法徽章搭配使用，以检测室内甲醛。目标用户包括公民科学家，有关公民，探访房屋的公共卫生护士以及具有相关测量需求的研究人员。用户界面是使用协作开发模型设计的。徽章暴露在空气中72小时，然后用户拍摄在手机中分析过的图像。该应用程序本身会测量照度（亮度）以确定颜色变化，这与甲醛浓度有关（R2 = 0.8811，P 80％）的相对湿度。共暴露于乙醛或VOC混合物不会影响测量（分别为P = 0.93，P = 0.07）。总体而言，此筛选工具可以为用户提供有关其甲醛暴露的廉价，可访问的信息，从而可以为进一步的测试和潜在的补救措施提供依据。

化学污染在室内环境中随处可见，但在研究之外，测量选项往往有限。甲醛尤其如此，甲醛是一种已知的致癌物质和刺激物。该项目的目标是开发一种新型的筛选工具：一款基于智能手机的应用程序，可与低成本的色度徽章配对，用于检测室内甲醛。目标用户包括公民科学家、有关公民、访问家中的公共卫生护士以及具有相关测量需求的研究人员。用户界面是使用协作开发模型设计的。徽章暴露在空气中72小时，用户拍摄图像，分析在手机。应用程序本身测量照明（亮度）以确定颜色变化，与甲醛浓度（R2 = 0.8811，P 80%）相对湿度。与乙醛或挥发性有机化合物混合物共同接触不会干扰测量（P = 0.93，P = 0.07）。总体而言，这种筛选工具可向用户提供关于其甲醛暴露的廉价、可访问的信息，从而为进一步的检测和潜在的补救活动提供信息。

Chemical contamination is ubiquitous in the indoor environment, but measurement options are often limited outside of research studies. This is especially true for formaldehyde, a known carcinogen and irritant. The goal of this project was to develop a novel screening tool: a smartphone-based app that can be paired with low-cost colorimetric badges for detection of indoor formaldehyde. The target users include citizen scientists, concerned citizens, public health nurses visiting homes, and researchers with relevant measurement needs. The user interface was designed using a collaborative development model. Badges were exposed to air for 72 h, and the user takes images that are analyzed in the phone. The app itself measures illumination (lightness) to determine color change, which was associated with formaldehyde concentration (R2 = 0.8811, P 80%) relative humidity. Co-exposure to acetaldehyde or a VOC mixture did not interfere with measurement (P = 0.93, P = 0.07, respectively). Overall, this screening tool can provide inexpensive, accessible information to users about their formaldehyde exposure, which can inform further testing and potential remediation activities.<br>