Preoxidation for colorimetric sensor array detection of VOCs.

Preoxidation for colorimetric sensor array detection of VOCs.
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DOI:
10.1021/ja207718t
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发表时间:
2011-10-26
影响因子:
15
通讯作者:
Suslick, Kenneth S.
Suslick, Kenneth S.
中科院分区:
化学1区
文献类型:
--
作者:
Lin, Hengwei;Jang, Minseok;Suslick, Kenneth S.

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报道了一种一次性预氧化技术,该技术通过比色传感器阵列显著提高了挥发性有机化合物(VOCs)的检测和识别。通过使蒸汽流在比色传感器阵列之前立即通过在二氧化硅上填充有铬酸的管,对反应性较低的VOC的灵敏度显著增加,并且检测限(LOD)提高约300倍,从而允许检测、识别,对20种常见的室内VOC污染物进行了直接危害生命或健康(IDLH)的区分和允许暴露限值(PEL)浓度。这些污染物的检出限平均为污染物容许浓度的1.4%。
A disposable pre-oxidation technique is reported that dramatically improves the detection and identification of volatile organic compounds (VOCs) by a colorimetric sensor array. By passing a vapor stream through a tube packed with chromic acid on silica immediately before the colorimetric sensor array, the sensitivity to less reactive VOCs is substantially increased and limits of detection (LODs) are improved ~300-fold, permitting the detection, identification, and discrimination of 20 commonly found indoor VOC pollutants at both their immediately dangerous to life or health (IDLH) and at permissible exposure limits (PEL) concentrations. LODs of these pollutants were on average 1.4% of their respective PELs.
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