Reliably Detect Pesticides Down to 10pg with Sensitive SIM GC/MS Multiresidue Method
By Jason Thomas, Environmental Innovations Chemist
Market demands are increasing for multiresidue pesticide methods that are both sensitive and effective across a broad range of compound chemistries. The Rxi®-5Sil MS column gives you accurate low level results for a wide variety of analytes in a single run.
As labs operate in an extremely competitive market, the demand for more sensitive multiresidue pesticide methods is increasing. A GC/MS method is a logical choice, as this instrument provides a high degree of specificity, yet is relatively inexpensive and easy to operate, compared to LC/MS/MS, high resolution MS, or GC/MS/MS. However, to take full advantage of GC/MS, careful column selection is critical. The column used must be of the proper selectivity to separate compounds that share common spectra, and also exhibit a high degree of inertness and minimal bleed. Here we demonstrate the effectiveness of an Rxi®-5Sil MS column for low level analysis of a wide variety of pesticides differing in volatility, compound class, and degree of activity.