Gravimetric Determination of Gold Using Thiosalicylic Acid

Department of Chemistry, Sri Venkateswara University, Tirupati 517502 Manuscript received 16 April 1975; accepted 5 June 1975 A method has been developed for the gravimetric determination of 18-100 mg of gold with thiosalicylic acid. Gold(III) is precipitated in 0.1 N hydrochloric acid solution, the precipitate washed with ethanol and weighed as HOOC.C6H4S. An after drying at 100°-110°. Ni(II), Co (II) and Zn(ll) did not interfere. The interference of Fe(III) was eliminated by masking with EDTA