Toxicity Exposure Ratio

The Toxicity Exposure Ratio (abbreviated TER ) is a risk indicator for the risk assessment of plant protection products . It indicates the ratio of the harmful concentration to the estimated exposure concentration for an organism (acute, chronic). The former usually uses EC ₅₀ , LC ₅₀ or NOEC , the latter usually the PEC .

The higher the TER, the lower the risk.

${\displaystyle TER={\frac {\text{Toxizitaet (EC50 / LC50 oder NOEC)}}{\text{Exposition (PEC)}}}}$

literature

• Section 6 - Ecotoxicological Studies and risk assessment , OECD Dossier Guidance, 2001.
• Otto Daniel, Michela Gandolfi, Annette Aldrich, Heike Baumann and Rudolf Büchi: Ecotoxicological risk analyzes of plant protection products , AGRARForschung, 2007, 14 (6), pp. 266–271.

Individual evidence

1. ↑ G. Arapis: Ecotoxicology, Ecological Risk Assessment and multiple stressors Springer, 2006, London, ISBN 1-4020-4475-5 .