Hello Rhys,

     I suggest using an assay such as that described in Anal. Biochem.
336:117 to measure the amount detergent in your concentrated samples.
I found this assay accurate and easy to use with DDM. It should work
with b-OG too.


Good luck,
Ho

Ho Leung Ng
University of Hawaii at Manoa
Assistant Professor, Department of Chemistry
h...@hawaii.edu

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