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John V. Hinshaw is senior staff engineer at Serveron Corp., Hillsboro, Oregon, and a member of LCGC's editorial advisory board. Direct correspondence about this column to "GC Connections," LCGC, Woodbridge Corporate Plaza, 485 Route 1 South, Building F, First Floor, Iselin, NJ 08830, e-mail LCGCedit@ubm.com. For an ongoing discussion of GC issues with John Hinshaw and other chromatographers, visit the Chromatography Forum discussion group at http://www.chromforum.com.
This was a strong year for GC systems. Here's what is new.
John Hinshaw reviews the new GC instruments and accessories that were on display at Pittcon 2011, which was held this March in Atlanta, Georgia.
The 62nd annual Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy (Pittcon), March 13–18, 2011, returned to Atlanta, Georgia, for the first time since 1997. I particularly enjoyed Atlanta for the Southern hospitality and food, easy access to and inside the Georgia World Congress Center, and the peach tree blossoms in Centennial Olympic Park. The conference exhibition floor provided some relief for weary aisle-walkers who took the time to hike to the far corners. There I found at various booths free fresh-baked chocolate chip cookies, coffee, croissants, a printed invitation to discuss the field of "chromatology," a new type of chair for surviving trade shows (free demonstrations offered), the usual superhero costumes, and electrical massage demonstrations that had some of us jumping around like Luigi Galvani's 18th-century frogs.
Pittcon total attendance in 2011 increased to 17,199 — up about 300 from 2010. The number of exhibiting companies increased slightly too, as did the number of exhibitor booths. Next year, the Pittsburgh Conference will return to the Orange County Convention Center in Orlando, Florida, March 11–15, 2012. If the next winter season is as inclement and extreme as this year's was, then the week's sojourn at this wandering conference's southernmost latitude will be welcomed enthusiastically.
Overall, 2010–2011 was another strong year for gas chromatography (GC). A number of companies introduced new GC instruments, both for the laboratory and as portable systems, rounded out by a significant number of new and improved automated sampling systems, highperformance mass spectrometry (MS) detectors, and clever time-saving accessories. This year's count of GC products is about even with each of the last two years, which shows that GC remains relatively immune to declining markets while showing significant growth in the high speed, miniature, micro, and portable areas.
Table I: Companies listed
This annual "GC Connections" installment reviews GC instrumentation and accessories shown at this year's Pittcon or introduced during the previous year at conferences such as ASMS or Analytica. For a review of new GC and liquid chromatography columns and related accessories, please see "Column Watch" in the March and April 2011 issues of LCGC, which are available at www.chromatographyonline.com.
The information presented here is based on manufacturers' replies to questionnaires, as well as on additional information from manufacturers' press releases, websites, and product literature, and not upon actual use or experience of the author. During the conference, I took time to stroll around the convention aisles and see some of the new products firsthand as well as discover a number of items that weren't covered by the questionnaires.
Every effort has been made to collect accurate information, but given the preliminary nature of some of the material, LCGC cannot be responsible for errors or omissions. This column cannot be considered to be a complete record of all new GC products shown at this year's Pittcon because not all manufacturers chose to respond to the questionnaire, nor is all of the submitted information included here because of the limited available space and the editors' judgment as to its suitability.
New GC Instruments
The trend in GC instruments at this year's Pittcon ran toward smaller size, reduced environmental impact, less carrier gas and power consumption, and improved ease of use. A list of some of the new instuments on offer is shown in Table II.
Table II: New GC instrument systems
The newest routine laboratory chromatographs feature high-efficiency oven insulation and smaller oven sizes that yield faster heating and cooling rates while using less power and supporting high speeds of analysis. The smaller mini- and micro-GC systems, by their nature, consume less power and carrier gas in a smaller footprint; several were hand-portable.
Table II: New GC instrument systems (continued)
Last year's industry consolidations resulted in a number of new GC instrument announcements from companies such as Bruker (Bremen, Germany), Agilent Technologies (Santa Clara, California), and Thermo Fisher Scientific (Waltham, Massachusetts) based on the models acquired last year.
One new company, Ellutia Chromatography Solutions (Charleston, South Carolina) announced it was forming by unifying a group of three partner companies: Advanced Chromatography Systems, Cambridge Scientific Instruments, and Unicam Chromatography. All told, there were at least 14 new GC instruments on display — a remarkable assortment for an allegedly mature technology.
Two new time-of-flight (TOF) MS detectors for GC stood out at this year's Pittcon. Offering the highest mass resolution and speeds in their class for demanding highperformance techniques such as high-speed GC or comprehensive GCxGC, TOF-MS detectors are ideal for analyses in which an MS detector enhances compound identification and quantification beyond the capabilities of the separation system alone, such as in a wide range of environmental, petroleum, food and flavor, and pharmaceutical applications. In the more conventional detector vein, Detector Engineering and Technology (Walnut Creek, California) is offering a new series of their retrofittable thermionic detectors, including a unique catalytic combustion ionization method for the selective detection of methylene functional groups. A list of some of the new detectors on offer is shown in Table III.
Table III: GC detectors
Sampling systems for GC saw increased activity, too. Agilent introduced a significant new development in headspace samplers with the model 7697A. The new design leverages the company's existing liquid auto-sampler's capabilities in a complete redesign of the previous workhorse headspace sampler.
Thermal desorption and pyrolysis took center stage too, with new products from Frontier Laboratories (Fukushima, Japan), Gerstel (Mülheim, Germany), and CDS Analytical (Oxford, Pennsylvania) along with a new cannister sampling accessory from Markes International (Llantrisant, United Kingdom). The common thread among all of these was automated handling of gaseous samples from diverse sources. Gerstel also introduced an updated version of its MPS multipurpose sampling and sample preparation robot. A list of some of the new GC sampling products on offer is shown in Table IV.
Table IV: GC sampling
Two accessories for capillary GC users are listed here. The Restek Flip-Seal (Restek, Bellafonte, Pennsylvania) for Agilent split–splitless inlets assists lower-seal maintenance and includes two useful seals in one part. From NLISIS (Eindhoven, The Netherlands), the Fuse capillary column connector accessory enhances column-to-column or precolumn connections.
Two new gas regulators were introduced with reduced contamination in mind. The AirGas regulator (AirGas, Radnor, Pennsylvania) includes a new check-valve on the high-pressure side to control tank and stream contamination with air or other gases in the regulator. Concoa (Virginia Beach, Virginia) showed a regulator with inert metal surface treatment to reduce interaction with sensitive sample components. Analytical Flow Products (Thetford Mines, Quebec, Canada) had two designs of rotary gas sampling valve actuators, and both AirGas and Concoa exhibited high-performance, high-pressure, analytical gas delivery manifolds.
I would like to thank the manufacturers and distributors that kindly furnished the requested information before, during, and after Pittcon 2011, allowing a timely report on new product introductions. For those manufacturers who did not receive a preconference questionnaire this year and would like to receive one and be considered for early inclusion in our Pittcon 2012 coverage, please send the name of the primary company contact, the mailing address, fax number, and e-mail address to Laura Bush, LCGC, Advanstar Communications, 485F US Highway One South, Suite 100, Iselin, NJ 08830, or e-mail email@example.com
(1) R. Majors, LCGC North America 29(3), 218–235 (2011).
(2) R. Majors, LCGC North America 29(4) 300–316 (2011).
John V. Hinshaw"GC Connections" editor John V. Hinshaw is Senior Scientist at BPL Global, Ltd., Hillsboro, Oregon, and a member of LCGC's editorial advisory board. Direct correspondence about this column to the author via e-mail: firstname.lastname@example.org.
John V. Hinshaw