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Subject: Re: Confined Space question
Date: Tue, 4 Dec 2007 08:13:09 -0600
Author: "Ellison, Mark" 		Next by Date:
Subject: Re: Flammables in Inert Atmosphere Glove Box
Date: Tue, 4 Dec 2007 13:37:58 -0500
Author: Dan Crowl

(Note: This post is 18 years old and may contain outdated information.)


Date: Tue, 4 Dec 2007 10:24:46 -0800
Reply-To: "Saldivar, Jay" <SaldivarJ**At_Symbol_Here**SHARPSEC.COM>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: "Saldivar, Jay" <SaldivarJ**At_Symbol_Here**SHARPSEC.COM>
Subject: Flammables in Inert Atmosphere Glove Box

One of our scientists has asked for guidance in the use of inert (N2)
atmosphere glove boxes for processes utilizing flammable liquids and
electrical appliances. Details of the process of concern follow:
*	Dispersed (in xylenes) silicon nanoparticles are to be further
dispersed using a SS ultrasonic wand (20 kHz)
*	Process to be performed in a N2 atmosphere glove box
*	Monitored O2 levels will not exceed 10ppm in the box
*	All power to the glove box (including the wand) is cut upon
exceeding 10ppm O2 concentration in the box
*	The lab bldg is provided with a fire sprinkler system as well as
CO2 extinguishers within 10 ft

Questions:
*	Is there a (any) concern regarding the use of a wand-type
ultrasonic to agitate a flammable solvent in an inert atmosphere?
*	Should this level of O2 (



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