RP-HPLC ANALYSIS OF THE COMPOUNDS IN THE SYNTHESIS MIXTURES OF 2,2-DIMETHYL-3-HYDROXYPROPIONALDEHYDE BY TWO METHODS COMBINED TO ONE INSTRUMENT BY A COLUMN SWITCHING TECHNIQUE

E. Koivusalmi Analytical Research, Fortum Oil and Gas Oy, Scientific Services, P. O. Box 310, Porvoo, FIN-06101, Finland

E. Haatainen Analytical Research, Fortum Oil and Gas Oy, Scientific Services, P. O. Box 310, Porvoo, FIN-06101, Finland

K. Nikkilä Department of Chemistry, Laboratory of Analytical Chemistry, University of Helsinki, P. O. Box 55 (A. I. Virtasen aukio 1), Helsinki, FIN-00014, Finland

Abstract

Two RP-HPLC methods are described for the determination of the compounds in 2,2-dimethyl-3-propionaldehyde synthesis mixtures. All the other compounds, except aliphatic aldehydes, are determined by a gradient programmed method using UV/DAD and RI detectors in series. Aldehydes are determined as their 2,4-dinitrophenylhydrazone derivatives using a UV/DAD detector. The selection between different columns and detectors is made with a column switching technique. The eluents and column temperature are selected so, that only one HPLC instrument is needed.

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RP-HPLC ANALYSIS OF THE COMPOUNDS IN THE SYNTHESIS MIXTURES OF 2,2-DIMETHYL-3-HYDROXYPROPIONALDEHYDE BY TWO METHODS COMBINED TO ONE INSTRUMENT BY A COLUMN SWITCHING TECHNIQUE

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RP-HPLC ANALYSIS OF THE COMPOUNDS IN THE SYNTHESIS MIXTURES OF 2,2-DIMETHYL-3-HYDROXYPROPIONALDEHYDE BY TWO METHODS COMBINED TO ONE INSTRUMENT BY A COLUMN SWITCHING TECHNIQUE

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