Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Sand flies are natural hosts of various microorganisms. Due to their epidemiological importance, sand fly colonies are kept in laboratories to be studied in terms of their biology and vector/host/parasite interactions. In order to investigate the presence of oviposition pheromones in Nyssomyia neivai, experiments using Solid Phase Microextraction (SPME) were performed. However, siloxanes which is an external class of contamination, present in breeding containers made by plaster used to maintain sand flies in colonies, may be hindered the experiments. Published by Elsevier B.V.1685053FAPESP (Fundacao de Amparo a Pesquisa do Estado de Sao Paulo-Process) [2012/23832-9]Programa de Apoio ao Desenvolvimento Cientifico da Faculdade de Ciencias Farmaceuticas at UNESP (PADC/FCFAr)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)