This ninhydrin solution reacts with amino acids present in sweat and turns purple due to the formation of Ruhemman's purple.

种茚三酮溶液与汗液中氨基酸发生反应，由于鲁赫曼紫形成而变成紫色。

For porous surfaces like paper or walls, fingerprints are detected by spraying a solution called ninhydrin on the surface where a print may be found.

对于像纸或墙样多孔表，在可能发现指纹表喷洒一种叫做茚三酮溶液来检测指纹。