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Updated: Jun 28, 2026

Analyzing the Photo-oxidation of 2-propanol at Indoor Air Level Concentrations Using Field Asymmetric Ion Mobility Spectrometry
Published on: June 14, 2018
Preconcentration with membrane cell and adsorptive polarographic determination of formaldehyde in air
Zheng-Qi Zhang1, Hong Zhang, Guang-Fu He
1College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China.
Abstract:
The present paper describes a procedure that formaldehyde in air was preconcentrated in a membrane cell and its content was determined by adsorptive polarography. First the formaldehyde in air samples was preconcentrated in a membrane cell using water, then the formaldehyde reacted with 2,4-dinitrophenyl hydrazine to form 2,4-dinitrophenyl hydrazone, which can be adsorbed at the mercury electrode and yields a sensitive adsorptive polarographic wave. Over the range 6.0x10(-10)-5.0x10(-6) M, the peak currents are linearly proportional to the concentration of formaldehyde, the detection limit is 2.0x10(-10) M.
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