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Stabilization of bromthymol blue colour in lecithin-sphingomyelin ratio determinations in amniotic fluid.
  1. A G Andrews,
  2. I Horacek,
  3. F R Betheras


    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.

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