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Many harmful and toxic substances were used in the past for the treatment of soil and plants. Today a more ecologically sensitive attitude is prevalent.
Natural processes are complex. For example, where do the active substances in mother's milk come from? How can we accelerate the decomposition of pesticides in the environment?
In the 1960's, Riedel-de Haën began the development of a broad range of high purity standards especially for those analytical laboratories working on problems involving the environment and food supplies. Today, Sigma-Aldrich offers more than 1500 residue analysis standards:
OEKANAL®
PESTANAL®
VETRANAL®
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