A rapid and highly sensitive paper-based colorimetric device for the on-site screening of ammonia gas
學年 109
學期 2
出版（發表）日期 2021-03-02
作品名稱 A rapid and highly sensitive paper-based colorimetric device for the on-site screening of ammonia gas
作品名稱（其他語言）
著者 Khachornsakkul, K.; Hung, K.-H.; Chang, J.-J.; Dungchai, W.; Chen, C.-H.
單位
出版者
著錄名稱、卷期、頁數 Analyst, 146(9), p.2919–2927
摘要 A rapid and highly sensitive paper-based colorimetric device for the on-site detection of ammonia (NH3) gas is presented in this study. The detection principle of this device is based upon a change of color from red to yellow on a paper that has been immobilized with a pH indicator, i.e., methyl orange (pKa = 3.4), in the presence of NH3 gas. The color signal of the device can be measured through the hue channel of an HSL system via the application of a smartphone. This device can detect the amount of NH3 gas within 3 min. The linear relationship between the NH3 gas concentration and the hue signal was found to be in the range from 6.0 to 54.0 ppbv with R2 = 0.9971, and the limit of detection was found to be 2.0 ppbv. In addition, this device showed remarkably high selectivity to NH3 gas amongst the other common volatile organic compounds and general gases that are present in environmental air without the assistance of any membrane material. Furthermore, we demonstrated the applicability of this device for the detection of total NH3 gas at a chicken farm and in a laboratory, with relative standard deviations of 6.2% and 5.4%, respectively. The developed NH3 gas device in the study is easy to operate and cost-effective, with the reduction of a large consumption of chemical reagents; also, its signals can be measured simply and then recorded through a smartphone. It is suitable for the application of routine on-site detection of NH3 gas, especially concerning regions which have limited resources.
關鍵字
語言 en
ISSN 1364-5528
期刊性質 國外
收錄於 SCI
產學合作
通訊作者 Chih-Hsin Chen
審稿制度 是
國別 GBR
公開徵稿
出版型式 ,電子版,紙本
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/120685 )

SDGS 氣候行動,良好健康和福祉,潔淨水與衛生