Sampling of working-zone air and biomaterials and unification of MPC values

Some points concerning the strategy of working-zone-air sampling, the sampling plan and the manner of sampling biological materials have been discussed. In drawing up an air-sampling plan, the following items should be paid attention to: production technology, organization, physicochemical properties and composition of the raw materials, intermediate and final products, potential sources of spread of harmful substances and their spread from these sources, the time picture of workers' presence, the analytical method and the concentration of the harmful substances in the working-zone atmosphere. In order to unify MPC's within the frame of CMEA, one should be informed about the norms and standardized methods in force in each country, work out and unify principles for sampling the air and biomaterials and work out a project of a unified way of evaluating analysis results.