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Highly Sensitive and Selective Detection of Formaldehyde via Bio-Electrocatalysis over Aldehyde Dehydrogenase
Analytical Chemistry ( IF 6.7 ) Pub Date : 2022-11-02 , DOI: 10.1021/acs.analchem.2c03632 Yinuo Zhang 1 , Yue Yu 1 , Changbin Zhang 2 , Ningning Song 1 , Zhanjun Guo 1 , Minmin Liang 1
Analytical Chemistry ( IF 6.7 ) Pub Date : 2022-11-02 , DOI: 10.1021/acs.analchem.2c03632 Yinuo Zhang 1 , Yue Yu 1 , Changbin Zhang 2 , Ningning Song 1 , Zhanjun Guo 1 , Minmin Liang 1
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Formaldehyde (HCHO), as one of the prominent indoor pollutants, causes many health-related problems. Although the detection of HCHO is a widespread concern and a variety of detection methods have been continuously developed, the volatile organic chemical (VOC) interference remains to be solved. Here, we report a highly sensitive and selective method for HCHO detection, relying on the selective electrochemical oxidation of formaldehyde catalyzed by aldehyde dehydrogenases (ALDHs) on a Cu electrode. The detection signal exhibits a standard power law relationship against the analytes with a broad detection range of 10–5–10–15 M and a limit of detection (LOD) of 1.46 × 10–15 M, far below the indoor safe exposure limit (about 10–9 M) for formaldehyde. In comparison to the standard spectrophotometry method, the ALDH-based electrochemical method shows a much high specificity to formaldehyde among common VOCs, such as benzene, toluene, and xylene. This simple yet effective detection technique opens up a new path for developing advanced formaldehyde sensors with high sensitivity and selectivity.
中文翻译：
醛脱氢酶生物电催化高灵敏选择性检测甲醛
甲醛 (HCHO) 作为主要的室内污染物之一，会引起许多与健康相关的问题。尽管HCHO的检测受到广泛关注，各种检测方法不断发展，但挥发性有机化合物（VOC）的干扰问题仍有待解决。在这里，我们报告了一种高灵敏度和选择性的 HCHO 检测方法，该方法依赖于在铜电极上由醛脱氢酶 (ALDH) 催化的甲醛选择性电化学氧化。检测信号与分析物呈标准幂律关系，检测范围为 10 –5 –10 –15 M，检测限 (LOD) 为 1.46 × 10 –15 M，远低于室内安全暴露限值 (大约 10 –9M) 甲醛。与标准分光光度法相比，基于 ALDH 的电化学方法对苯、甲苯和二甲苯等常见 VOC 中的甲醛具有更高的特异性。这种简单而有效的检测技术为开发具有高灵敏度和选择性的先进甲醛传感器开辟了一条新途径。
更新日期：2022-11-02
中文翻译：
醛脱氢酶生物电催化高灵敏选择性检测甲醛
甲醛 (HCHO) 作为主要的室内污染物之一，会引起许多与健康相关的问题。尽管HCHO的检测受到广泛关注，各种检测方法不断发展，但挥发性有机化合物（VOC）的干扰问题仍有待解决。在这里，我们报告了一种高灵敏度和选择性的 HCHO 检测方法，该方法依赖于在铜电极上由醛脱氢酶 (ALDH) 催化的甲醛选择性电化学氧化。检测信号与分析物呈标准幂律关系，检测范围为 10 –5 –10 –15 M，检测限 (LOD) 为 1.46 × 10 –15 M，远低于室内安全暴露限值 (大约 10 –9M) 甲醛。与标准分光光度法相比，基于 ALDH 的电化学方法对苯、甲苯和二甲苯等常见 VOC 中的甲醛具有更高的特异性。这种简单而有效的检测技术为开发具有高灵敏度和选择性的先进甲醛传感器开辟了一条新途径。
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