♫ ♫ ♫ ♫ ♫ ♫ Keep Em Separated Rtx-VMS: Fluorobenzene & TCE

Reminds me of the group Offspring–Your VMS should be fast–but a few of you speed demons have gone crazy with your columns and squeezed trichloroethene (TCE) & fluorobenzene (FLB) together–Since quant ions for these two are m/z 95 & 96, respectively, and both have minor ions of m/z 96 & 95, respectively, there is trouble brewing. If you are using FLB for an IS & have TCE as a target you may have a 50X concentration difference in your calibration curve – that’s where the real trouble starts. EPA 8260B allows for FLB to be an IS or SS. Even worse, 524.2 calls for FLB as the only internal standard. Contribution of m/z 96 from TCE can artificially inflate the values of FLB, which results in artificially low recoveries of your targets. An unstable MS tune can incorporate m/z 97 from TCE to further complicate matters. The attachment shows 1 ppb TCE & 50 ppb FLB on Rtx-VMS. Minimize tailing & follow our conditions (see catalog) and you will be doing your part to Keep ‘Em Separated…

Further reading: Volatile Technical Guide

Leave a Reply

Restek Domestic Customer Service



Your Full Name

Your Email

Company Name


Spam Block (Please leave this blank)

all fields required

Thank you

Your message has been sent. We will be in touch shortly.

Message not sent

Sorry, your message could not be sent at this time. Please try again later, or contact Restek or your local Restek representative via phone.