摘要：Background information is presented on the development of specifications for 75% DDT water-dispersible powder for use in malaria control programmes supported by the International Cooperation Administration (ICA) of the United States Government. Early difficulties with DDT powders used in these programmes were investigated and it was found that the most critical requirements involved packaging, suspensibility and storage stability. ICA specifications were evolved to meet these requirements. The suspensibility test developed is described, and the importance of inspection of the material procured is discussed. Full text Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (799K), or click on a page image below to browse page by page. 913 914 915 916 917 918 919 920
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