title: Stabilization of bromthymol blue colour in lecithin-sphingomyelin ratio determinations in amniotic fluid.
abstract: Amniotic fluid lecithin and sphingomyelin areas after extraction and chromatography are rendered permanently visible by the use of bromthymol blue dye buffered to a pH of 11-3.
mesh_terms: D000653:Amniotic Fluid / Q000032:analysis*; D001979:Bromthymol Blue; D002855:Chromatography, Thin Layer; D005260:Female; D006801:Humans; D008722:Methods; D010713:Phosphatidylcholines / Q000032:analysis*; D011247:Pregnancy; D013109:Sphingomyelins / Q000032:analysis*
chemical_list: D010713:Phosphatidylcholines; D013109:Sphingomyelins; D001979:Bromthymol Blue