[Determination of 29 adjuvants in pesticide formulations by gas chromatography-mass spectrometry].

A method based on gas chromatography-mass spectrometry (GC-MS) was developed for the simultaneous determination of 29 adjuvants in pesticide formulations. The pesticide formulation was diluted with methanol, and the supernatant was filtered through a 0.22-μm membrane.

Phthalate exposure, even below US EPA reference doses, was associated with semen quality and reproductive hormones: Prospective MARHCS study in general population.

Background: Environment-Protection-Agency Reference Doses (EPA RfDs) for phthalate intakes are based on limited evidence, especially regarding low-dose male-reproductive toxicity. This study investigates the association between phthalate exposure and semen parameters and reproductive hormones in a general population with low phthalate exposure compared to the EPA RfDs.

Methods: The MARHCS (Male-Reproductive-Health-in-Chongqing-College-Students) cohort recruited 796 male students, who experienced a relocation of campuses and shifting environmental exposure.