Sorption-SPECTROPHOTOMETRIC METHOD FOR DETERMINATION OF LEAD (II)

摘要

1. Sorption spectrophotometric method for the determination of lead (II), comprising bromopyrogallol red indicator reaction, characterized in that added to the assay solution with an acetate buffer pH 3,5-4,5, to the resulting solution were immersed indicator film for 30-60 min, removed and the optical density of the indicator film spektofotometre volnm length at 610 nm, the lead concentration was determined by the standard addition method or calibration curve, and as the indicator of the film using a transparent polymer hydrochloric substrate coated with a layer of gelatin to 20 microns thick, the immobilized aqueous bromopyrogallol krasnogo.2. A method according to claim 1, characterized in that the indicator tape is made of transparent photographic film for offset printing from AGFA company gelatin layer thickness up to 20 microns, an immobilized aqueous solution with a concentration of Bromopyrogallol Red 8,5 · 10M, for at least 20 minutes. 3. A method according to claim 2, characterized in that the immersion time of the indicator film is 60 min.