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8576236 
Journal Article 
Hexane Extraction of Arsenic(III) and Antimony(III) with O,O′-Diethyl Dithiophosphate1 
Havashi, K; Sasaki, Y; Tagashira, S; Soma, Y; Kato, S 
1986 
Yes 
Analytical Sciences
ISSN: 0910-6340
EISSN: 1348-2246 
2 
4 
347-350 
English 
The conditional stability constant and the distribution constant of [M(dtp)3](M3+=As3+ or Sb3, dtp-=O,O′-diethyl dithiophosphate) were determined by analyzing the relationship between the distribution ratio of arsenic or antimony and the concentration of dtp-. The values for arsenic(lll) complex were 1011.12(mol dm-3)-3(in 2 mol dm-3 sulfuric acid solution) and 103.0, respectively. Those for antimony(lll) complex were 1010.4(mol dm-3)-3 (in a solution of pH 1.6) and 102.4, respectively. Both arsenic(lll) and antimony(III) were quantitatively extracted into hexane with Kdtp of 2 mmol dm-3 from 1 -2 mol dm-3 sulfuric acid solution, only antimony(lll) was extracted from a solution of pH 1.3-2.5, and neither of them was extracted at pH 4.2 or above. The separation method of arsenic(lll) from antimony(lll) and the reverse are proposed. © 1986, The Japan Society for Analytical Chemistry. All rights reserved. 
antimony(lll); arsenic(lll); hexane; O,O′-diethyl dithiophosphate; Solvent extraction