Do you QuEChERS? Are you thinking about how QuEChERS might be good for your sample cleanup. In this post you can find comparative data on CarbonX and GCB in this short presentation. Just 11 minutes could save you lots of money!
1. How can QuEChERS benefit me/ my work? QuEChERS with CarbonX can streamline your workflow, reduce the number of preparation steps, reduce time required to evaporate, reduce maintenance costs, and improve calibration stability. In general, QuEChERS removes matrix and leaves the analyte in solution. Thus in your method development, you often can use it in combination with SPE and determinative steps to quantify multi-analytes. 2. How long does the QuEChERS procedure take? The actual extraction and dSPE cleanup procedure should take [...]
A recent presentation by Stephen Lehotay of the USDA explained the use and benefits of the QuEChERS technique. It is a excellent primer and a review of the state of the art in QuEChERS. Both the webinar and the presentation are linked here.
CarbonX for QuEChERS A short video demonstrating the use of United Science’s new product, CarbonX for QuEChERS, and its ability to remove pigments. The method being used here is the AOAC 2007.1 Pigmented method. Spinach is a difficult matrix to deal with, but with CarbonX for QuEChERS you can remove the pigment you don’t want without removing the pesticides you do.
Dual-Phase SPE QuEChERS method with CarbonX/PSA for use in Cleanup of 18 Pesticide Residues in Spinach Analyzed by GC/MSUnited Science
Conor Smith, Ph.D. Introduction: A new modified Schenck SPE QuEChERS method is described below. This method employs a pass-through SPE method and gives good recoveries of 18 GC/MS amenable pesticides while removing the pigment from the spinach extract. Reagents and Chemicals: United Science Dual Phase QuEChERS tubes with 500 mg CarbonX for QuEChERS and 500 mg of PSA (P/N 1605344173) were used for sample cleanup. Spectral grade Acetonitrile (ACN) from MPBio was used along with glacial acetic acid from Ampresco. Method: Initially, [...]
United Science’s proprietary carbonization techniques lead to tunable analytical silicas. A .pdf is available here.
A summary of some of CarbonX for QuEChERS properties and capabilities A .pdf can be downloaded here.
Analysis of 16 Pesticide Residues in Broccoli Using CarbonX dSPE QuEChERS AOAC Kits Using GC/MS Authors: Conor Smith, Doug Fryer United Science Corp. 15911 Furuby Rd. Center City,MN55012 USA Abstract This application note describes the use of a quick, easy, cheap, effective, rugged, and safe (QuEChERS) AOAC sample preparation technique used in the extraction and cleanup of 16 pesticide residues in broccoli. The pesticides are all amenable to GC/MS analysis. The method involves the extraction of the pesticides from homogenized broccoli with a buffered aqueous/acetonitrile solvent system [...]
Analysis of 18 Pesticide Residues in Red Pepper Using CarbonX dSPE QuEChERS AOAC Kits Using GC/MS Authors: Conor Smith, Doug Fryer United Science Corp. 15911 Furuby Rd. Center City, MN 55012 USA Abstract: This application note describes the use of a quick, easy, cheap, effective, rugged, and safe (QuEChERS) AOAC sample preparation technique used in the extraction and cleanup of 18 pesticide residues in red pepper. The pesticides are all amenable to GC/MS analysis. The method involves the extraction of the pesticides from homogenized red pepper with [...]
Spinach Matrix Removal Capacity of CarbonX for QuEChERS compared to GCB Introduction: Graphitized Carbon Black (GCB) is generally added to QuEChERS dispersive solid phase extraction (dSPE) kits when the food extract is highly pigmented. This is due to the fact that pigments and sterols cause fouling of the liner and column as well as decreased signal to noise when quantitating samples on GC/MS and LC/MS/MS systems. CarbonX for QuEChERS greatly reduces the losses of planar pesticides observed with GCB sorbents. In [...]