CSI E-Chronicle - September 2013
The e-chronicle is a monthly publication from Chromatographic Specialties Inc. It showcases new products, suppliers, literature and news from across the chromatography industry.
New Application Notes
- Determination of Aflatoxins in Edible Oils using Immunoaffinity Column Clean-up and Post-column Derivatization becomes First Action Official Method of Analysis - Pickering Laboratories
- Fingerprinting Crude Oils and Tarballs Using Biomarkers and Comprehensive Two-Dimensional Gas Chromatography
- HPLC Analysis of Glucosinolates in Vegetable Extracts Without Ion Pairing Using an Ultra Aqueous C18 Column
- Evaluation of Dispersive and Cartridge Solid Phase Extraction (SPE) Cleanups for Multiresidue Pesticides in QuEChERS Extracts of Finished Tobacco Using GCxGC-TOFMS
Horizon Technology XcelVap™ Evaporation/Concentration System
Liquid/Liquid, continuous, micro or solid phase extractions of environmental, food, clinical or other matrices need solvent evaporation to rapidly reduce sample volumes to be appropriate for the best analytical instrument sensitivity.
The XcelVap System provides:
Automated pressure profiling for optimum speed with the most reproducible recoveries
Nozzles can be individually changed by the user, simplifying maintenance and reducing operating costs
Easy water bath management with water level sensor and front draining for best performance
Click here to read more. Literature Code: HZ11
Buy a NEW Restek LC Multi-Residue Pesticide Kit and Receive a FREE LC Column and QuEChERS kit.
Until December 31st, 2013. Buy a NEW LC Multi-Residue Pesticide Kit and chose one of four FREE LC Column and QuEChERS kits.
Click here for full promotion details
- High quality at an economical price
- All common fittings are available in brass or stainless steel
- Compatible with other commonly used fittings
- Fittings - Tube Fittings, 37º Flared, Pipe Fittings, UH Line Fittings
- High Tech Components - Glands, Mini Buttweld Fittings, Swivel Connectors...plus many more
- Process Valves & Actuators - Ball Valves, Needle Valves...plus much more
- Filters - Brass and Stainless Steel Finishes in Many Designs
- High Purity Valves - High & Low Pressure UCV, UC Metering Valves, Vacuum Generator
- Check & Relief Valves - Fixed and Adjusted Cracked Pressure, Relief and Check Valves
- Quick Connectors - EPDM O-Ring (-57ºC to 121ºC), Perfluorocarbon O-Ring (-26ºC to 260ºC) and Viton O-Ring (-26ºC to 204ºC)
- Sample Cylinders
- Flexible Hoses - Stainless Steel and PTFE
Click here to order.
Event & Location
|Time & Date|
|September 15th - 18th, 2013|
25th Université de Sherbrooke Undergraduate Students' Annual Chemistry Symposium, Montreal
|October 18th, 2013|
New Application Notes
Determination of Aflatoxins in Edible Oils using Immunoaffinity Column Clean-up and Post-column Derivatization becomes First Action Official Method of Analysis - Pickering Laboratories
Pickering Laboratories, Inc was one of several laboratories who participated in a collaborative study for determination of Aflatoxins in edible oils. In March 2013 this method was adopted as AOAC First Action Official Method of Analysis and assigned number 2013.05.
According to the method, Aflatoxins are extracted from oils and extracts are cleaned using immunoaffinity clean-up columns. Aflatoxins are separated on a reversed-phase column and derivitized using either Photochemical or Electrochemical Derivatization. While participating in this study Pickering Laboratory used the UVE Photochemical Reactor with great success. Click here to read more.
Fingerprinting Crude Oils and Tarballs Using Biomarkers and Comprehensive Two-Dimensional Gas Chromatography
Petroleum biomarkers are “molecular fossils” that can be analyzed with gas chromatography to fingerprint crude oil. Fingerprints can then be used to determine the source oil for an oil spill or highly weathered tarballs. This unique fingerprint is developed by evaluating several ratios of key biomarkers, such as steranes and hopanes. Comprehensive two-dimensional gas chromatography time-of-flight mass spectrometry (GCxGC-TOFMS) was used to evaluate biomarker ratios in several crude oils from various regions and also in tarballs that washed ashore on the gulf coast of Florida up to a year after the Deepwater Horizon oil spill of 2010. Click here to read more. Literature Code: RK155
HPLC Analysis of Glucosinolates in Vegetable Extracts Without Ion Pairing Using an Ultra Aqueous C18 Column
Glucosinolates are a naturally occurring set of compounds found in a variety of edible plants, most notably in broccoli, radish, and cabbage. Agriculturally, the degradation compounds of glucosinolates have been shown to act as natural pesticides and fungicides. Research on glucosinolates is continuing in hopes of bringing a more environmentally friendly approach to pest control. The analysis of a phenethyl glucosinolate standard using an Ultra Aqueous C18 column shows good peak shape without the use of ion-pairing reagents Click here to read more. Literature Code: RK156
Evaluation of Dispersive and Cartridge Solid Phase Extraction (SPE) Cleanups for Multiresidue Pesticides in QuEChERS Extracts of Finished Tobacco Using GCxGC-TOFMS
Restek used the Quick–Easy–Cheap–Effective–Rugged–Safe (QuEChERS) sample preparation approach to isolate residues prior to analyzing pesticides in tobacco. They evaluated the cleanup efficacy and pesticide recoveries for different formulations of QuEChERS dispersive solid phase extraction (dSPE) cleanup and the more traditional cartridge solid phase extraction (cSPE) cleanup. Comprehensive two-dimensional gas chromatography time-of-flight mass spectrometry (GCxGC-TOFMS) was used to determine pesticide residues in the resulting extracts. The results of the cleanup evaluation indicated that the dSPE cleanup formulation with 7.5 mg of carbon (verses 50 mg) provided the best recovery of targeted pesticides. Click here to read more. Literature Code: RK157