About ACC | Careers | Contact | ACC Calendar | News & Notices | Newsletter | Catalogs | Home

Associates of Cape Cod, Inc.
ACC's Technical Support

Frequently Asked Questions


How do I convert EU/ml to ng/ml of endotoxin?

Endotoxin Units (EU) are a measure of the activity of the endotoxin. Endotoxins differ in their biological activity or potency; the pyrogenicity or LAL reactivity of one endotoxin preparation may be very different from that of another of the same weight. Conversely, two endotoxin molecules may be different sizes and different weights but may have the same reactivity in an LAL test. The potency of an endotoxin determined with one LAL reagent lot may differ from that determined with another lot. Expressing endotoxin concentrations in EUs avoids the issues of different potencies of different endotoxins and allows us to compare results of different LAL tests performed in different labs. Consequently, we do not usually convert results of an LAL test in EU/ml to units of weight of endotoxin per ml.

References: Associates of Cape Cod, Inc. LAL Update, Vol. 15, No. 4, December 1997. Gould, M.J. 1998. Performing the LAL gel-clot test in facilities. Nephrology News & Issues 2(11):26-27,29.


Back to FAQ's

© Copyright 2014 Associates of Cape Cod, Inc. 124 Bernard E. Saint Jean Dr., E. Falmouth, MA 02536, All Rights Reserved. Terms and Conditions
This website uses cookies to allow us to see how the site is used. The cookies cannot identify you. If you continue to use this site we will assume
that you accept this. If you would like to learn more about cookies, click here.