Abstract
A batch method was developed for the determination of copper (II) in sea water by using cellulosetriacetate (TAC) containing 2-hydroxyphenylethylketone oxime (HPEKO), which were synthesizedfrom 2-hydroxyphenylethylketone and hydroxy ammonium chloride, as an adsorbent. Theanalytical procedure by standard addition is as follows. Place 1 liter of filtered sea water, 1ml of2.5, 5.0, or 7.5 ppm, copper (II), and 2g of the HPEKO-TAC powder into three 1-liter beakers, respectively. Stir for 20h, filter the adsorbent to separate it from sea water, transfer the adsorbentinto a 100ml Erlenmeyer flask, add 20 ml of 0.5M hydrochloric acid and shake it 30 min. Afterfiltering off the adsorbent, transfer 20ml of the filtrate into a 25ml beaker, evaporate on a hotplate. After cooling to room temperature, place 2ml of O.1% (w/v) bathocuproine disulfonic aciddisodium, 1ml of 10% (w/v) hydroxyammonium chloride and 1ml of 30% (w/v) ammonium citrate, tribasic solution into the beaker. Transfer the solution into a 10ml volumetric flask and dilutethe solution to the mark with water. Shake well and measure the absorbance of the solution witha 1cm glass cell at 478nm against a reagent blank. The analytical result was 2.2±0.27 μg of Cu (II) /liter of sea water.
