40 Introduction about incubator

Environmental toxicologists use incubators to conduct standardized bioassays that assess the impact of pollutants (pesticides, industrial chemicals, biopharma) on organisms, forming the basis for ecological risk assessment.

Common tests include: Algal growth inhibition tests, where green algae are exposed to a chemical in flasks within illuminated incubators with controlled temperature, and growth is measured over 72 hours. Daphnia (water flea) acute immobilization tests, where organisms are exposed in multi-well plates held at 20°C in incubators, and mortality/immobility is recorded after 24-48 hours. Earthworm reproduction tests in soil, incubated at constant temperature. Seed germination and root elongation tests for plants.

The incubator’s role is to eliminate natural environmental variability (like temperature fluctuations), ensuring that any observed effect (reduced growth, reproduction, or survival) is attributable to the chemical stressor and not to uncontrolled physical conditions. These standardized tests, performed under Good Laboratory Practice (GLP), generate data used by regulatory agencies worldwide (like the EPA or ECHA) to set safe environmental concentration limits, protecting ecosystems and human health.