Some new aspects of a HPLC-method for the determination of traces of formaldehyde in air |
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| Authors: | Andreas Gr?mping and Karl Cammann |
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| Institution: | (1) Lehrstuhl für Analytische Chemie, Anorganisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, D-4000 Münster, Germany |
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| Abstract: | Summary A practicable method was developed for the routine determination of formaldehyde in air. Formaldehyde is sampled in small sampling tubes filled with Chromosorb P, coated with 2,4-dinitrophenylhydrazine (= DNPH). The sorbent is extracted with acetonitrile, and the different DNPhydrazones were separated by reversed-phase HPLC. UV-detection at  = 345 nm was compared with electrochemical detection. The detection limit was 100 pg for UV- and 50 pg for electrochemical detection with a linear range of more than 3 decades, respectively. For the determination of formaldehyde in air the detection limit is 10 ppb with an average recovery of 99.3% and an estimated relative standard deviation S of 1.5%. This method was compared with the sampling by impingers using the same separation and detection method.
Einige neue Aspekte einer HPLC-Methode zur Spurenbestimmung von Formaldehyd in Luft
Dedicated to Prof. Dr. G. Tölg on the occasion of his 60th birthday |
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