Despite the high interest of researchers in the study of organic acids in various plant objects, there is no information on the composition of organic acids for many officinal plant species. Such species include а plant known for а long time in medical practice - Blue Jacob's Ladder (Polemonium caeruleum L.), belonging to the family of Polemoniaceae.

Samples of grass and rhizomes with roots Blue Jacob's Ladder were used as the studied plant material and were harvested in the Altai Territory and purchased from а private supplier. Blue Jacob's Ladder grass was collected during flowering, underground organs - in autumn, in the first year of the plant's life. The quantitative total organic acid content in terrns of malic acid was carried out Ьу the titrimetric method according to phaпnacopoeial monograph.2.5.0093.18 State Pharmacopoeia of the RF XIV ed. "Rowan ordinary fmit". The experimental study of the quahtative composition of organic acids and the assessment of their quantitative content in the grass of the studied objects was carried out using the electrophoretic method (Кареl, St. Petersburg, Russia). А high content of organic acids in grass and rhizomes with roots Blue Jacob's Ladder was estabhshed Ьу the phaпnacopoeial method. Ву the electrophoretic method the profile and quantitative content of organic acids of Blue Jacob's Ladder was studied for the fIГSt time, а comparative research of their content in grass and rhizomes with roots was carried out. The difference between grass and root-peel with roots of the studied plant is shown, both in component and quantitative composition of organic acids.