In order to survey the contamination of particulate matters in commercial large volume parenteral solutions, we purchased 550 samples randomly from hospitals and drugstores in Taiwan area from Sep., 1985. to Jan., 1986. All samples were analyzed by the electrical resistance method described in the B. P. 1980 using a particle size analyzer (Coulter counter (superscript ®)). The results showed that a total of 88 cases (i. e., 16.0%), including 74 domestic and 14 imported products, did not meet the requirements of ”Limit Test for Particulate Matters” in B. P. 1980. Among the domestic disqualified samples, the contaminations of particulate matters for both sodium chloride and Ringer's solutions were more serious than that of the glucose-containing solutions (pure glucose, electrolyte-glucose and glucurolactone-glucose were all included). About 43.5% of imported amino acid solutions can't meet the requirements specified in the B. P. 1980.