Pesticide analysis is accomplished through the use of a Liquid Chromatography Triple Quadrupole Mass Spectrometry (LC-MS/MS) instrument here at MRX Labs. The analytical sensitivity of this instrument is very useful to ensure we can detect and accurately quantify all state required pesticide analytes at their action limit and below.
The analytical process of the instrument has a similar sampling process as a High Pressure Liquid Chromatography instrument that involves a mobile phase composed of multiple solvents, adsorbent column and pump system. The significant difference is the use of an EI spray to disperse the sample through the first MS. The first MS allows the precursor ions of interest into the collision cell, where they are collided with a neutral gas, argon gas, to create product ions that are fragments of the precursor ions. In both the first and third quadrupole, the system “scans” for both precursor and product ions that are quantified. Each analyte has unique precursors and product ions, giving us the ability to identify specific analytes easily. The use of two mass analyzers allows us to identify and quantify trace amounts of an analyte by drastically reducing the amount of non-target analytes in the measurement portion of the system.
MRX Labs is currently subcontracting all pesticide analyses to an ORELAP accredited pesticide testing lab. We are not accredited for pesticide testing at the moment. Please email or call us for more information.