Sol-gel based sensor for selective formaldehyde determination
Sol-gel based sensor for selective formaldehyde determination
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DOI：
10.1016/j.aca.2009.11.034
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发表时间：
2010-02-05
影响因子：
6.2
通讯作者：
Higson, Seamus P. J.
中科院分区：
文献类型：
--
作者：
Bunkoed, Opas;Davis, Frank;Higson, Seamus P. J.
我们报告了透明溶胶凝胶的开发，其中包含用于检测甲醛的敏感和选择性试剂。该采样方法基于从空气中吸附甲醛并与溶胶-凝胶基质中的β-二酮（例如乙酰丙酮）反应生成黄色产物二甲基吡啶，可直接检测。所提出的方法不需要在分析前准备样品，并且允许通过视觉检测进行筛选和通过简单的分光光度法进行定量测量。据报告，甲醛检测限为 0.03 ppmv，低于世界卫生组织 (WHO) 和职业安全与健康管理局 (OSHA) 推荐的最大暴露浓度。该采样方法具有良好的重现性，0.2 和 1 ppmv 的相对标准偏差分别为 6.3% 和 4.6%。其他羰基化合物，即乙醛、苯甲醛、丙酮和丁酮不会干扰这种分析方法。提供室内空气中甲醛的测定结果。 (C) 2009 Elsevier B.V. 保留所有权利。
We report the development of transparent sol-gels with entrapped sensitive and selective reagents for the detection of formaldehyde. The sampling method is based on the adsorption of formaldehyde from the air and reaction with beta-diketones (for example acetylacetone) in a sol-gel matrix to produce a yellow product, lutidine, which was detected directly. The proposed method does not require preparation of samples prior to analysis and allows both screening by visual detection and quantitative measurement by simple spectrophotometry. The detection limit of 0.03 ppmv formaldehyde is reported which is lower than the maximum exposure concentrations recommended by both the World Health Organisation (WHO) and the Occupational Safety and Health Administration (OSHA). This sampling method was found to give good reproducibility, the relative standard deviation at 0.2 and 1 ppmv being 6.3% and 4.6%, respectively. Other carbonyl compounds i.e. acetaldehyde, benzaldehyde, acetone and butanone do not interfere with this analytical approach. Results are provided for the determination of formaldehyde in indoor air. (C) 2009 Elsevier B.V. All rights reserved.