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Analytical Letters Volume 37, 2004 - Issue 12
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Environmental Analysis

Kinetic Spectrophotometric Determination of Formaldehyde in Fabric and Air by Sequential Injection Analysis

Suling Feng Department of Chemistry, Lanzhou University, Lanzhou, 730000, P.R. China; Key Laboratory of Environmental Science and Engineering of Henan Education Department and School of Chemical and Environmental Sciences, Henan Normal University, Xinxiang, China
,
Jing Fan Key Laboratory of Environmental Science and Engineering of Henan Education Department and School of Chemical and Environmental Sciences, Henan Normal University, Xinxiang, China
,
Aijun Wang Key Laboratory of Environmental Science and Engineering of Henan Education Department and School of Chemical and Environmental Sciences, Henan Normal University, Xinxiang, China
,
Xingguo Chen Department of Chemistry, Lanzhou University, Lanzhou, 730000, P.R. ChinaCorrespondence[email protected]
&
Zhide Hu Department of Chemistry, Lanzhou University, Lanzhou, 730000, P.R. China
Pages 2545-2555 | Received 23 Dec 2003, Accepted 10 Mar 2004, Published online: 22 Aug 2007
 
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Abstract

A kinetic method for measuring formaldehyde by sequential injection analysis (SIA) with spectrophotometric detection was developed for the first time. The method was based on the inhibitory effect of formaldehyde on the ethyl green (EG)–sulfite reaction. The linear range for formaldehyde was 1.0–20.0 µg mL−1; the detection limit was 0.020 µg mL−1. The measurement rate was 130 sec, thus allowing to analyze 27 samples per hour, the total reagent consumption in a cyclical procedure is only 240 µL. The method was applied to the determination of formaldehyde in fabric and air, and compared with acetyl acetone spectrophotometric method.

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