Abstract
Formaldehyde and other low-molecular-weight aldehydes were studied as lutidine derivatives by high-performance liquid chromatography using an NH 2-chemically bonded stationary phase, prepared from silica gel treated with benzene solutions containing 5–30% 3-aminopropyltriethoxysilane. From elemental analysis data for nitrogen and carbon, the maximum number of accessible NH 2 surface groups per gram of silica gel was estimated to be 0.45 × 10 21.
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