Vasundhara T S, Parihar D B
J Chromatogr. 1979 Aug 11;176(2):225-31. doi: 10.1016/s0021-9673(00)85654-x.
Aldehydes in foods can conveniently be characterized and determined by thin-layer chromatography (TLC) after converting them into their dimethones. For further confirmation the dimethones can be cyclized on the TLC plates or in solution to give octahydroxanthenes. Aldehydes also can be determined as their barbiturates. The aldehydes could be determined as dimethones and octahydroxanthenes in amounts up to 5 micrograms and as barbiturates in amounts up to 7.5 micrograms at their UV maxima.
食品中的醛类在转化为二甲基酮后，可通过薄层色谱法（TLC）方便地进行表征和测定。为进一步确证，二甲基酮可在TLC板上或溶液中环化生成八氢呫吨。醛类也可测定为其巴比妥酸盐。在紫外最大吸收波长处，醛类以二甲基酮和八氢呫吨形式测定时，含量可达5微克，以巴比妥酸盐形式测定时，含量可达7.5微克。
