Since 1975, Dr. Ehrenstorfer™ has led the way in producing pesticide reference standards. Today, our portfolio has expanded to adapt to changing regulations and technology, as we support your need for high quality reference materials for food and environmental analysis. With all measurements on our certificates of analysis carried out in accordance with ISO 17025 and a majority of products produced under the scope of our ISO 17034 accreditation, you know you are receiving the products you need with quality you can rely on.