Abstract
Abstract A high-performance liquid chromatographic method for the simultaneous determination of C1-C2 aldehydes and organic acids in aqueous samples has been developed. Aldehydes and organic acids are separated after derivatization of the aldehydes by 2,4,-dinitrophenylhydrazine and by gradient elution on reversed-phase material. Measurement is by UV and conductivity, respectively. The detection limits, using an injection volume of 100 μl, for formaldehyde, acetaldehyde, formic acid and acetic acid are 5 μgl−1, 10 μgl−1, 15 μgl−1 and 30 μgl−1, respectively. Aldehydes are stabilized by the derivatization reagent for a period of maximal five days in the field. Results of measurements of rain, mist and dew samples, collected in Petten (The Netherlands) indicate the presence of C1-C2 aldehydes and organic acids in the range from 0.01 to 3 mgl−1.
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