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Previous by Date: Subject: Re: [DCHAS-L] chemical receiving Date: June 29, 2012 11:45:48 AM EDT Author: "House, Katherine C." |
Next by Date: Subject: Re: [DCHAS-L] chemical receiving Date: June 29, 2012 1:57:45 PM EDT Author: Jeffrey Lewin |
I don't know if you have yet considered the ceric ammonium nitrate test for alcohols? An alcohol of 6 carbons or less will oxidize to its corresponding carboxylic acid while cerium(IV) reduces to cerium(III) producing its characteristic red color. This test works especially well for water soluble alcohols.
Richard Swanson
Chemist
From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of 8524828hau**At_Symbol_Here**COMCAST.NET
Sent: Friday, June 29, 2012 8:19 AM
To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
Subject: Re: [DCHAS-L] Lab Safety Discussion List
See http://www.astm.org/Standards/E346.htm describing an assay that relies on the oxidation of methanol by permanganate.
David Haugen
Retired
From: "Todd Perkins" <p3wt3r**At_Symbol_Here**CHARTER.NET>
To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
Sent: Thursday, June 28, 2012 8:55:12 PM
Subject: Re: [DCHAS-L] Lab Safety Discussion List
I suggest researching the JAOAC for methodology and build a gravimetric calibration curve and determine limit of detection. It might not have anything helpful but there's also "inorganic spot tests" by Fiegl & Anger.
Just some ideas.
Todd Perkins
Sent from my iPhone
On Jun 28, 2012, at 6:23 PM, "Casparian, Armen" <caspariana**At_Symbol_Here**WIT.EDU> wrote:
Hi Jim,
Do you or anyone else in the discussion group know of a simple wet, chemical qualitative method for detecting the presence of methanol in an aqueous solution? The exact concentration is not necessary but a relative/comparative concentration would be nice. In particular, I would like to monitor the methanol concentration as aspartame decomposes over time in soft drinks, suitable for an undergraduate laboratory experiment. I suppose FDA must have protocol for this, but their method may involve the use of a GC-FID.
Thanks,
Armen
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Sent: Thursday, June 28, 2012 4:57 PM
To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
Subject: [DCHAS-L] Lab Safety Discussion List
LABSAFETY-L is the internet discussion list of the Laboratory Safety Institute (LSI). It provides an open forum for the discussion lab safety questions,concerns, and ideas. Information about subscribing can be found at http://www.labsafetyinstitute.org/Resources.html.
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Regards, ... Jim
James A. Kaufman, Ph.D.
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