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Analytical Instrumentation
New Triple Quadrupole GC/MS Offers Greater Precision, Selectivity and Sensitivity
Agilent Technologies (USA) introduce the 7000B Triple Quadrupole Gas Chromatograph/Mass Spectrometer (GC/MS/MS), delivering high confidence in ultra-trace level results, while shortening analysis times for target compounds in complex samples.
The Agilent 7000B provides femtogram-level sensitivity for analyses such as pesticides, PAHs, PCBs, pyrethroids, THC, and steroids in food, environmental, pharmaceutical, and forensic matrices.
Agilent introduced the “A” version of this instrument in June 2008. The 7000 Series system was the first MS/MS specifically designed to handle the rigorous demands of high-temperature separations of complex matrices. Agilent’s gold-plated quartz, hyperbolic quadrupole analysers operate at temperatures up to 200 degrees Celsius without any loss of resolution or sensitivity. The 7000B extends the performance and capabilities with the introduction of more sensitive electron ionization (EI) source and a new chemical ionization (CI) source. All of these improvements are reverse compatible to the 7000A.“With the 7000B introduction, Agilent is shifting the performance emphasis from signal-to-noise to precision.” said Terry Sheehan, Ph.D., Agilent GC/MS product manager. “As MS/MS baseline noise approaches zero, RSD of peak response is a far better benchmark of performance. We’ve designed the Agilent 7000B GC/MS/MS to deliver the precision needed to make accurate qualitative and quantitative decisions even at dwell times as small as 1 millisecond.”
GR Scientific Family of Titrators Aquamax KF Coulometric
Karl Fischer Titrator Water content determination from 1 microgram water. Typically used for very low ppm through to low percentage levels of water. Simple operation, small footprint, integral printer, unique low drift glassware, fully portable.
Aquamax KF Volumetric
Karl Fischer Titrator For measuring water contents in the milligram through to high percentage ranges. Simple operation, several easy to use programmes. Two high precision 5ml syringes, two built in peristaltic pumps.
Aquamax TAN Total Acid Number Titrator
Conforms to ASTM D664 for determination of acidic constituents in petroleum products, lubricants and transformer insulating oils.
All titrators are covered by 5 year parts & labour warranty. Worldwide distributor network – contact us for details.
G.R. Scientific Ltd P.O. Box 242, Ampthill, Bedfordshire, MK45 5AQ, Tel. +44 1525 404747 • Fax. 01525 404848 Email
info@grscientific.com Web
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The new high-sensitivity EI source sends more precursor ions to the mass analyser, increasing sensitivity and precision. Source temperature is programmable up to 350 degrees Celsius to accommodate complex matrices. High temperature also means less cleaning, reducing labour requirements and increasing uptime. The source is fabricated of solid inert materials, rather than coated, for durability and stable performance.
The new positive and negative CI source generates ideal precursor ions for MS/MS. Based on the proven CI source of the single quadrupole Agilent 5975C GC/MSD, this PCI/NCI source is built to deliver high sensitivity and trouble-free CI operation.
The 7000B MS/MS achieves ultra-fast multiple reaction monitoring (MRM) speed of 500 per second without any “cross talk” between consecutive transitions. High-speed MRM enables users to determine more compounds per ion group than with comparable instruments. Agilent has enhanced the capabilities of the 7890 GC with a new multi-mode inlet (splitless, PTV and split) and new high-efficiency backflush tools. As compared to traditional column bakeout, backflushing high-boiling matrix extends column life, shortens analysis time, and reduces source maintenance.
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New Termal Desorption Instrument for VOC and SVOC Analysis
Markes International Ltd (UK) has announced the launch of its new thermal desorption (TD) instrument for gas chromatography (GC). The new TD-100™ is the latest in a line of innovative and technologically advanced thermal desorption systems from the company. The system is based on the established and reliable thermal desorption technology for which Markes is renowned. The TD-100 incorporates sample re-collection for repeat analysis, electrical cooling to lower running costs and maintain instrument “up time” and is compatible with all TD-compatible compound types (VOC, SVOC and reactive species; high concentration right down to trace level samples).
A low-cost, fully automated instrument, the TD-100 couples to any make of GC or GC/MS and complies with standard methods. It is a high capacity instrument capable of the sequential analysis of up to 100 sorbent tubes, which is perfect for high-throughput laboratories and offers reliable and unattended operation for extended periods of time. To make sample and tube tracking hassle-free and to eliminate the chance of errors, the TD-100 includes RFID sample sorbent tube tracking technology (TubeTAG™) as standard.
The TD-100 has been designed for the sampling and analysis of trace toxic and odorous chemicals (VOC and SVOC) in air/gas and materials.
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60 Innovative Solutions for Extraction and Evaporation
Innovative techniques for the determination of analytes in environmental and food matrices in the trace and ultra-trace range are one of the main challenges of chemists nowadays. Büchi (Switzerland) offers excellent solutions for extraction and evaporation in environmental analysis: SpeedExtractor and Syncore®
Analyst.
Büchi’s new SpeedExtractor offers an efficient solid/liquid extraction method, using high temperature and pressure to accelerate the extraction process and to reduce the solvent consumption. With its parallel format up to six samples can be extracted simultaneously within approximately 20 to 40 minutes. The SpeedExtractor also distinguishes itself by its user-friendliness. The desired method is loaded, then the extraction cells are sealed automatically and, at the push of a button, six samples are extracted. This provides a high degree of safety and eliminates handling errors. The SpeedExtractor’s flexibility is unique as well: Temperature range of 50-200°C, pressure range of 50-150 bar, extraction cell size of 10-120 ml, and an integrated step for rinsing into a separate waste container.
Buchi impresses with intelligent laboratory solutions which create an optimised process flow. The SpeedExtractor’s parallel format is ideally complemented by the parallel evaporator Syncore®
Analyst.
This paired system allows for collection vessels to be transferred directly and therefore without any sample loss, and to be concentrated in parallel to pre-defined residual volumes. The key feature of the Syncore®
Analyst is
an integrated cooling zone which stores the sample in a cooled environment. High recovery rates are achieved with the ultimate Flushback Module that gently rinses the glass walls during operation with the solvent being evaporated. The risk of cross-contamination is eliminated by an individual sample sealing system and by separated vacuum channels. Efficient and parallel concentration in less than one hour and the reduction of environmental impact due to solvent recovery make the Syncore®
Analyst the system of choice for concentration down to pre-defined residual volumes in trace and ultra-trace analysis. Reader Reply Card No 58 Reader Reply Card No 61
February/March 2010
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