A simple and highly sensitive colorimetric detection method for gaseous formaldehyde.
نویسندگان
چکیده
A colorimetric detection method using amine-functionalized polymer films doped with a pH indicator has been developed for the rapid, sensitive, and quantitative detection of gaseous formaldehyde at concentrations well below the immediately dangerous to life or health (IDLH) limit. In 1 min, visible color changes are easily observed, even down to the permissible exposure limit (PEL) at 750 ppb. The limit of detection is below 50 ppb (7% of the PEL) after 10 min of exposure. This sensor is essentially unaffected by changes in humidity or temperature (4 to 50 degrees C) and is not sensitive to common interferents.
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ورودعنوان ژورنال:
- Journal of the American Chemical Society
دوره 132 12 شماره
صفحات -
تاریخ انتشار 2010