Hi All,  

LGR's Liquid Water Isotope Analyzers do not require the use of compressed air. These analyzers are designed to operate with the drying unit supplied with each analyzer (drierite). This drying unit effectively dries ordinary ambient air for use as a flush gas and thus obviates the need for compressed gas cylinders. 

(Of course, the analyzer does not prohibit the use of compressed air and users are welcome to use compressed air if desired.) 


For any questions or assistance anytime, please contact the ABB Support Team at [log in to unmask]

Best regards,

Anja Moritz, Chemist

Instrumentation and Application Specialist

ISOSPARK Analytical Solutions

2298 chemin Saint-François

Dorval, Québec

H9P 1K2


Tel: (514) 282-2181 x113

Cell: (514) 476-3200
Fax: (514) 282-2171
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From: Stable Isotope Geochemistry <[log in to unmask]> on behalf of John Mering <[log in to unmask]>
Sent: July 11, 2018 6:10 PM
To: [log in to unmask]
Subject: Re: [ISOGEOCHEM] LGR T-LWIA compressed air purity
'Zero grade' should be ok. We've been using an 'industrial grade' air cylinder from BOC on our T-WVIA and had no issues.

John A. Mering

Ph.D. Student, Earth Sciences
University of Waikato
Private Bag 3105
Hamilton 3240
New Zealand

Phone: +64 021 08801685

On Thu, Jul 12, 2018 at 8:12 AM, Munizzi, Jordon <[log in to unmask]> wrote:

Hi everyone,

We just received a new Los Gatos T-LWIA water isotope analyzer, but the bottle of compressed air that's supposed to ship with it is missing.

I have a cylinder of 'zero grade' (1 ppm hydrocarbons, 19.5% to 23.5% O2) compressed air in the lab, but I'm having a hard time getting an answer from LGR (1) regarding the purity of the compressed air that's supposed to ship with the unit; and (2) whether my compressed air cylinder, along with the supplied Drierite drying unit, would be sufficiently pure to flush the cavity. 

What grade of compressed air do LGR users out there normally use to flush their units? Any input is greatly appreciated.

Best wishes,



Jordon Munizzi, PhD

Research Facility Manager

Kentucky Stable Isotope Geochemistry Lab (KSIGL)

Department of Earth and Environmental Sciences

University of Kentucky

Ph: (859) 270-9177

Fax: (859) 323-1938

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