Rapid and easy quantification of elemental sulphur in aqueous samples from biological reactors: the turbidimetric method revisited - Godoi, Leandro Augusto Gouvêa de; Guerrero, Renata de Bello Solcia; Santos, Carla Eloisa Diniz dos; Foresti, Eugenio; Zaiat, Marcelo; Damianovic, Márcia Helena Rissato Zamariolli (International Journal of Environmental Analytical Chemistry, 2019)