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- E-ISSN 2288-8985
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The effect of relative humidity on the performance of DNPH-cartridge sampling for odorous aldehydes
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2012, v.25 no.1, pp.50-59
https://doi.org/10.5806/AST.2012.25.1.050
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(2012). The effect of relative humidity on the performance of DNPH-cartridge sampling for odorous aldehydes. Analytical Science and Technology, 25(1), 50-59, https://doi.org/10.5806/AST.2012.25.1.050
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Abstract
In this study, the effect of humidity change on DNPH cartridge sampling efficiency for carbonyl compounds (CCs) has been investigated. For this analysis, gaseous standard of 6 different CCs (formaldehyde (FA), acetaldehyde (AA), propionaldehyde (PA), butyraldehyde (BA), isovaleraldehyde (IA), and valeraldehyde (VA)) was calibrated after derivatization with three types of DNPH cartridge products. Their calibration results derived at RH values between 0 and 80% were then compared against liquid phase standards. If the results of our analysis are compared by the RH values between 20 and 80%, the effect of RH can be distinguished between light and heavy CCs. For lighter CCs (like FA and AA), there was no significant change. However,for the ones heavier than PA, there was fairly noticeable increase in relative recovery ratio in RH value between 20 and 80%. Such patterns are seen consistently from all three DNPH products tested for comparison. The results of our analysis suggest that proper correction for RH change may be needed for heavier CCs by the cartridge method.
- keywords
- carbonyl compounds, liquid standard, gaseous standard, recovery, percent difference (%)
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