Quantitation using Evaporative Light-Scattering Detector?

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Top of pagePrevious messageNext messageBottom of pageLink to this message  By Bruce Freeman on Monday, September 27, 1999 - 11:18 am:

I have been using an Alltech ELSD ("Evaporative Light-Scattering Detector") for quantitation of HPLC peaks. I have worked out a pretty simple means of "linearizing" the signal and quantitating both known and (to a limited extent) unknown components. I have no idea whether this is a new approach or whether it or something similar has been published.

I probably should have done a literature search before I began this work, but initially it was only to be qualitative work -- then the objectives changed. I am initiating a literature search now.

However in my experience it is always better to "ask someone who knows". So I'm asking:

Does anyone know of any "standard" or previously published procedures for quantitating the peaks detected with an ELSD?


Top of pagePrevious messageNext messageBottom of pageLink to this message  By Anonymous on Tuesday, September 28, 1999 - 10:49 am:

Alltech has a Technical Note titled "Linearity" that discusses linearity and the Alltech ELSD. You can request it over email by visiting their website: www.alltechweb.com
The note is not an actual journal article/reference, but it might help.


Top of pagePrevious messageNext messageBottom of pageLink to this message  By bill on Friday, October 1, 1999 - 02:03 pm:

Bruce,
ELSD detectors were first commercially available in the early 1980`s.ACS/POLYMER LABS
-VAREX/ALLTECH-SEDEX are possible sources of the info on linearity or more correctly the non-linearity of light scattering detectors.


Top of pagePrevious messageNext messageBottom of pageLink to this message  By Bruce Freeman on Thursday, October 7, 1999 - 06:11 am:

Follow-up to original posting:
So far a search of the WWWeb has provided no information on the non-linearity or how to deal with it.
I have not located a technical note on the Alltech web site that specifically addresses linearity of the ELSD, and if someone could give me a number for that note, I would appreciate it.
I have printed off a number of Alltech's "posters" on the ELSD, and have spoken to a tech. rep. there who said that in her experience the ELSD was fairly linear. It appears from the Alltech literature that they sometimes draw a straight line through the calibration points and go with that. That is probably acceptable at times.
I will continue to explore web resourses while our research librarian goes through the printed literature.
Thanks.


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