Scientists used a 3D-printing approach to pattern hydrophobic barriers inside hydrophilic filter paper. These barriers, ...

IN order to obtain a good separation in filter paper chromatography, the size of the spot of liquid applied to the paper must be small, which often necessitates repeated, time-consuming applications ...

SEVERAL methods 1–6 have been published for the quantitative estimation of amino-acids after separation by filter-paper chromatography. In general, these methods have only been applied to simple amino ...