Letter Published: 22 August 1953 Paper Chromatography of Amino-Acids in Cerebrospinal Fluid A. P. PRIOR & T. P. WHITEHEAD Nature 172, 358–359 (1953) Cite this article ...

The amino acid content of the urine was studied by two-dimensional paper chromatography with the use of Whatman 3-mm. filter paper, 12 by 12 inches, with pyridine acetone ammonium hydroxide (5:3:2 ...

Fasting urine and plasma samples were initially screened for amino acid content by two-dimensional partition chromatography of filter paper. 4 The results of this method were verified by high ...