4-(2-ピリジルアゾ)レソルシノールとカプリコートを担持したシリカゲルを用いる水中のニッケルとコバルトの濃縮

概要

論文の詳細を見る
The separation and preconcentration of trace nickel(II) and cobalt(II) form an aqueous solution for a graphite-furnace atomic-absorption spectrometric (GF-AAS) determination was studied using silica gel loaded with 4-(2-Pyridylazo)-resorcinol (PAR)/trioctylmethylammonium chloride (Capriquat). The proposed adsorbent was prepared as follows: ten grams of silica gel were shaken into 25 ml of a 5% Capriquat-xylen solution and a 0.01% PAR solution for 30 minutes. A sample solution of 100〜1000 ml containing Ni(II) and Co(II) was adjusted to pH 9.0. The solution was then passed through 1.0 g of PAR/Capriquat-loaded in a silica gel column at a flow rate of 10 ml min^<-1>. The Ni(II) and Co(II) collected on the PAR/Capriquat-loaded silica gel on the column was eluted with 10 ml of 0.2 M nitric acid, and then deteminated by GF-AAS. In this method, over 99% of the Ni(II) and Co(II) was adsorbed at about pH 9.0. The calibration curve was linear from 0.05 to 2.5 μg/l Ni(II) and 0.03 to 3.0 μg/l Co(II). The proposed method has been applied to the determination of Ni(II) and Co(II) in sea-water samples.
社団法人日本分析化学会の論文
1998-10-05