VOC (volatile organic compounds) analysis must be done in an environmentally controlled area. In a general laboratory where laboratory solvents such as acetone, methylene chloride, or ethers are used will be in the air and a sub-ppb levels, it does affect back ground. We have found interferences from local automobile painting facilities and even idling trucks (BTEX) in the area to increase background.
Of course, the types of samples being analyzed and the detection level are critical and also, if analysis is for regulatory purposes, there are important restrictions on reporting levels and MDLs (method detection levels) especially with methylene chloride.
JK
Jerome King | Technical Director
13611 B Street Omaha, NE 68144
Office 402-829-9890 Cell 402-658-5005
From: "Vivian L. Longacre" <vlongacr**At_Symbol_Here**CALPOLY.EDU>
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Sent: Thursday, December 1, 2016 10:12:34 AM
Subject: Re: [DCHAS-L] VOC measurement
I believe that you mean Volatile Organic Compounds (VOC) analysis by GC/MS. A GC/MS analysis, whether it is in air, water/soil, etc. is an airtight system and will not pull in lab interference. You will not be able to tune the MS consistently if you have
air leaks and will end up burning out your source if you run with air leaks. That being said, you will need venting of the system at the outlet inside the lab.
Vivian
Vivian Longacre
Safety Training Specialist
Environmental Health & Safety
Cal Poly State University
San Luis Obispo, CA
Direct 805.756.6628
vlongacr**At_Symbol_Here**calpoly.edu
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU> on behalf of AbdulAziz AlRueshed <abdulaziz208**At_Symbol_Here**HOTMAIL.COM>
Sent: Thursday, December 01, 2016 6:35:29 AM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: [DCHAS-L] VOC measurement
Good Night Gentlemen,
we are plaining to commission GC-MS in our lab to conduct the Violated Organic Carbon (VOC ) of environmental samples.
Is this measurement required to be done in the isolated lab to minimize the interferences or we can install the instrument in the open lab.
best regards,
AMR
Sent from my iPhone
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