Studies on the Use of Acetothioacetanilide as a Gravimetric Reagent for Zinc, Cadmium and Mercury
| Main Authors: | TARASANKAR PAL, JOYTIRMOY DAS |
|---|---|
| Format: | Article Journal |
| Bahasa: | eng |
| Terbitan: |
, 1977
|
| Subjects: | |
| Online Access: |
https://zenodo.org/record/6421478 |
Daftar Isi:
- Department of Chemistry, The University of Burdwan, Burdwan 713104, West Bengal (India). Manuscript received 21 January 1977, accepted 13 July 1977 Zinc (8-33 mg), cadmium (10-30 mg) and mercury(II) (18-54 mg) have been determined by weighing their bis-complexes with acetothiocetanilide of general formula M(C10H10ONS)2, M standlng for Zn, Cd or Hg. The ranges of complete precipitation are 7.0-7.5, 6.9-8.7 and 1.3-1.8 respectively. Separation of Cd2+ from Zn2+ is possible in the presence of citrate, from Pb2+ In the presence of triethanolamine and from Mg2+, UO22+, Cr3+ and AL3+ in the presence of tartrate. Mercury( II) can be separated from Zn2+, Cd2+, Cu2+, Ni2+, Co2+, MoO22+, Sb2+, Bi2+, Fe3+, Cr3+, Th4+, Zr4+, VO2+, VO-1 , MoO42-and TeO43+ when sufficient Na3-EDTA is added. Tartrate can also be used to mask Fe3+, while pb2+, Mn2+, Mg2+ and Al3+ do not interfere at the pH of precipitation of mercury(II). Cadmium and mercury(ll) have also been separated by controlling the pH. Only AsO33-, has been found not to Interfere with the determination of zine. However, the zinc content of several samples of non-ferrous alloys have been determined after separating the foreign ions using an anion exchanger, Dowex-50-WXS (CI-). The relative standard deviations are ±0.5%, ±0.31% and ±0.14% respectively for zinc, cadmium and mereury(II).