Abstract
Quantitative analysis of pesticide products is often based on analytical procedures that require substances of precisely known purity as reference materials. In addition, samples of "pure" active ingredient (AI) are needed for registration purposes, in part for the determination of some physical-chemical properties, and also for submission to the authorities. Pure AIs from several pesticides are available commercially or from particular institutes. Some pure pesticides, especially those of newly developed products, must be provided by the manufacturer. Substances like these have a variety of names, such as pure AI, pure pesticide, reference material, pure standard, or analytical grade sample. It is suggested that internationally uniform names be given to highly purified substances and to other samples that are used as reference materials for determination and certification of purity and other quality criteria. DAPA recommends that 2 kinds of reference materials be distinguished: primary reference substance and working standard, and offers draft guidelines for standardization and draft certification forms for reference materials. Finally, it is proposed that CIPAC (Collaborative International Pesticides Analytical Council) or FAO (Food and Agriculture Organization) publish corresponding papers.
Determination of Physical, Chemical Properties of the Hot Springs Waters and Comparison of Bacteria: Hot Springs in the East and Southeast Anatolia Region of Turkey
