“…Asselineau (38) and Noda (819) have written summaries on the chromatography of acids, and Fateeva (303) has reviewed their paper chromatography. Liquid-solid column chromatography is still used in this field; not only for carboxylic acids with additional functional groups (406,526,587,729,1206,1244) and sulfonic acids (515) or for a preliminary, crude separation (183, 1010), but also for the fractionation of lower fatty acids (1203) and fatty esters (343, 431). Fatty acids (566) and their esters (717) can be fractionated on undecane-impregnated (566) or nonimpregnated chromatoplates with results that are in some respects superior to those achievable by gas chromatography (717).…”