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Etude de la structure des agglomerats de noir de carbone formes par combustion d'acetylene dans un bruleur a diffusion coannulaire

The collection efficiency of amosite fibers was measured for nuclepore filters as a function of NPF pore size and flow rate by four different measurement techniques – a gravimetric determination based on the activity of 57 Fe, a comparative fiber count using SEM, the use of a modified Royco with a variable flow rate, and a Climet. Comparisons of the four methods are made, and their appropriateness is discussed. Measurements indicate that the efficiency is a weak function of flow rate.