[ RadSafe ] Re: Trying to track down for purchase a Scintrex UA3Uranium Fluorimeter

[Dan W McCarn]

Dan W. McCarn, Geologist; 504 East 23rd Street; Houston, TX 77008; USA
Cell: +1-505-710-3600; Home: +1-832-767-0817; Office: +1-713-241-5726;
Austria:  +43-676-725-6622
 <mailto:mccarn at unileoben.ac.at> mccarn at unileoben.ac.at
<mailto:HotGreenChile at gmail.com> HotGreenChile at gmail.com
<mailto:Dan.McCarn at shell.com> Dan.McCarn at shell.com

 

Hi - 

 

The old UA3's suffered greatly from the limited life of the UV laser and
quite variable UV light output.  They are not as easy to operate as your
friend might remember from the "good old days".  Because of significant
baseline drift, I used the method of standard additions (with a
micropipette) to calibrate the instrument "on the fly" and got very good
results.

 

Dr Bruce Thomson, Chair of the Environmental Engineering Department of the
University of New Mexico in Albuquerque has one of these instruments, but it
would require at least $10,000 to repair it.  New instruments cost about
$50,000 or more from Scintrex.  I took a close look at that instrument to
determine what it would take to repair it several years ago.  He might be
willing to sell it to you.

 

There are alternatives.  A more conventional spectrophotometer also has a
similar MDL and PQL in the high ppt.  I priced one built by a Russian firm
in St. Petersburg several years ago at about $10-$15,000.  The UV light
source could be replaced at a low cost.  The following hyperlink discusses
some of the more common analytical methods:

 

http://www.atsdr.cdc.gov/toxprofiles/tp150-c6.pdf

 

Inductively coupled plasma-mass spectrometry (ICP-MS) is the standard lab
method today.

 

Good Luck!

 

Dan ii

 

Dan W McCarn, Geologist

Albuquerque & Houston

 

-----Original Message-----
From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] On Behalf
Of Mark Sonter
Sent: Sunday, June 17, 2007 05:42
To: radsafe at radlab.nl; njombwe at hotmail.com
Subject: [ RadSafe ] Re: Trying to track down for purchase a Scintrex
UA3Uranium Fluorimeter

 

Scintrex UA3 desktop Uranium Fluorimeter: One of my colleagues is trying 

to source one these 1970's origin instruments, or a more recent 

equivalent. Does anyone have any ideas where we can get one??

 

Mark Sonter

 

Radiation Advice & Solutions Pty Ltd,   abn 31 891 761 435

Asteroid Enterprises Pty Ltd,   abn 53 008 115 302

 

116 Pennine Drive

South Maclean

Queensland 4280

Australia

 

Phone / fax  (07) 3297 7653

 

"Keep everything as simple as possible, but no simpler"  - Albert Einstein

 

 

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