From: "Casparian, Armen" <caspariana**At_Symbol_Here**WIT.EDU>
Subject: Re: [DCHAS-L] Lab Safety Discussion List
Date: July 1, 2012 11:53:42 AM EDT
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: <SNT123-DS40B401C1434FF4DDF8B28BFE50**At_Symbol_Here**phx.gbl>


Thank you, Richard Swanson.  Will give it a try.

 

Armen Casparian

 

From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU]On Behalf Of Richard Swanson
Sent: Friday, June 29, 2012 1:22 PM
To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
Subject: Re: [DCHAS-L] Lab Safety Discussion List

 

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 bypermanganate.

 

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

 

From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU]On Behalf Of JAKSAFETY**At_Symbol_Here**AOL.COM
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

 

As moderator of the list, I can assist anyone who has questions or would like assistance subscribing.

 

Regards, ... Jim

 

James A. Kaufman, Ph.D.
Chair, ICASE Committee on Safety in Science Education
International Council for Associations of Science Education
www.icaseonline.net

President/CEO
The Laboratory Safety Institute (LSI)

A Nonprofit International Organization for
Safety in Science and Science Education

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