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- W4376564184 abstract "Abstract A new miniaturized liquid extraction cartridge equipped with a functional porous polytetrafluoroethylene membrane was developed for the determination of formaldehyde in gaseous samples. The functional polytetrafluoroethylene membrane allows gas to pass through while repelling both water‐based and organic‐based liquids. A derivatization reagent for formaldehyde, 2,4‐dinitrophenylhydrazine, was placed in the cartridge and gaseous samples are collected through the cartridge at 20 ml/min for 30 min. Formaldehyde in the gaseous sample is captured as the corresponding 2,4‐dinitrophenylhydrazine hydrazone, and an aliquot of the sample collection solution can be directly subjected to high‐performance liquid chromatographic analysis. The limit of quantification for the developed method was 5 ng/L formaldehyde in gas with a sampling volume of 600 ml. Proof‐of‐concept for formaldehyde determination in an aqueous sample was demonstrated using the developed cartridge in a purge‐and‐trap extraction setup." @default.
- W4376564184 created "2023-05-16" @default.
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- W4376564184 date "2023-05-14" @default.
- W4376564184 modified "2023-09-26" @default.
- W4376564184 title "Miniaturized liquid extraction cartridge with a functional porous polytetrafluoroethylene membrane for the determination of formaldehyde in gaseous samples" @default.
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- W4376564184 doi "https://doi.org/10.1002/sscp.202300033" @default.
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