I worked at the Centers for Disease Control and Prevention (CDC) for many years.  This is the kind of work that they do.  I would suggest that you look on the CDC website under the National Center for Environmental Health, and within that under the Division of Laboratory Sciences, Toxicology Branch.  It has been so long that I don't know many of the people there currently but this Division works on developing methods to measure exposure to toxic substances by identifying and measuring biomarkers in blood, serum, urine, and other matrices.  Good luck.  Thanks. Bob Hill

-----Original Message-----
>From: DCHAS Membership Chair
>Sent: Jun 20, 2019 10:45 AM
>To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
>Subject: [DCHAS-L] A Chemistry Question
>
>From: Boitumelo Kgarebe
>Re: A Chemistry Question
>
>Dear All, I have a postgraduate student who is working on alcohol biomarkers in Vitreous Humour.
>
>He is looking to separate Ethyl glucuronide (EtG) and Ethyl sulphate (EtS) , alcohol biomarkers, from biological matrices (specifically Vitreous Humour) using SPE. What would you suggest as the most appropriate SPE sorbent to use?
>
>Can anyone assist?
>
>--
>Regards
>BVK
>
>---
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