Smartphone App for Residential Testing of Formaldehyde (SmART-Form)
Smartphone App for Residential Testing of Formaldehyde (SmART-Form)
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DOI：
10.1016/j.buildenv.2018.11.029
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发表时间：
2019-01-15
影响因子：
7.4
通讯作者：
Dannemiller, Karen C.
中科院分区：
文献类型：
--
作者：
Zhang, Siyang;Shapiro, Nicholas;Dannemiller, Karen C.
化学污染在室内环境中无处不在，但在研究之外，测量选项往往有限。对于已知的致癌物和刺激物甲醛来说尤其如此。该项目的目标是开发一种新的筛查工具：一种基于智能手机的应用程序，可以与低成本的比色徽章配对，用于检测室内甲醛。目标用户包括公民科学家，关心的公民，公共卫生护士家访，并与相关的测量需求的研究人员。用户界面的设计采用了协作开发模式。徽章暴露在空气中72小时，用户拍摄的图像在手机中进行分析。该应用程序本身测量照度（亮度）以确定颜色变化，这与甲醛浓度相关（R-2 = 0.8811，P < 0.0001）。检测范围为20-120 ppb，读数的标准偏差为10.9 ppb。该应用程序集成了传感器，以解决当前的限制，包括对极端光照条件和相对湿度升高（> 80%）的敏感性。同时暴露于乙醛或VOC混合物不会干扰测量（分别为P = 0.93，P = 0.07）。总的来说，这种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，这可以为进一步的测试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 (R-2 = 0.8811, P < 0.0001). The detectable range was 20-120 ppb and the standard deviation of readings was 10.9 ppb. Warnings were integrated into the app to address current limitations, including sensitivity to extreme lighting conditions and elevated ( > 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.