Reboucas, M. V., G. Massa, A. R. C. and Vinicio Assis, M. . (2006) “Analysis of effluent from caustic treatment plants: Improvement of accuracy in the simultaneous potentiometric determination of sulfide and mercaptide ions”, CT&F - Ciencia, Tecnología y Futuro, 3(2), pp. 163–170. doi: 10.29047/01225383.499.