Micellar models, molecular volumes and error analysis of the fitting p
rograms are discussed from the point of view of the reliability of the
micellar aggregation numbers obtained from SANS. Comparison of aggreg
ation numbers published by different authors indicates essential coher
ence; differences may be caused by the improper choice of the molecula
r volumes and by the incompleteness of the micellar models applied. (C
) 1997 Elsevier Science B.V.