Abstract
In presence of tartaric acid and ammonium chloride, quinaldinic acid quantitively precipitates palladium from a hot solution at a pH range 3 to 7 whereas other ions such as arsenic (As3+ and As5+), mercury (Hg2+), cadmium, bismuth, antimony, iron, chromium, aluminium, beryllium, thorium, cerium (Ce3+), titanium, zirconium, uranium (UO22+), vanadate, molybdate, tungstate, cobalt, nickel, manganese, magnesium, calcium, barium and strontium remain in solution. The palladium complex is quite insoluble in hot water and can be dried at any temperature up to a maximum of 353° C when it decomposes.
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