Mass Spectrometry & Spectroscopy 11 Mercury Determination in Air, Water and Soils
For over 30 years PS Analytical (PSA) has been at the forefront of trace mercury (Hg) determinations from environmental samples. Understanding the fate and transportation of Hg is vitally important and this requires accurate analytical measurements.
Hg, from natural and anthropogenic sources, cycles between land, air and water. When atmospheric Hg enters the water column it can be converted to methylmercury by microbial activity and subsequently bio-accumulated by fish and other aquatic species.
The toxicological effects of Hg have long been realised and recently has there has been an international effort to reduce Hg emissions. Effective control and reduction of Hg emissions is the ultimate aim and these efforts, all of which need to be accurately monitored.
PSA employs Atomic Fluorescence Spectrometry (AFS) to determine Hg and also offers online Hg analysers to monitor mercury emitted from industrial sources.
Employing AFS has many advantages for Hg determinations. These include; sub ngL-1 limits of detection, a linear response over several orders and minimised interferences from other matrix components. PSA’s unique flow cell design, removing troublesome glass or quartz material, results in reduced carryover for faster throughput. Ease of use, reliability and robustness as well as very affordable running costs are hallmarks of the PSA brand.
With literally thousands of systems in the field today, and with support networks in Europe, USA and SE Asia, PSA offers the ideal package of performance, reliability and support.
39972pr@reply-direct.com
New Nanosponge Surface Enhanced Raman Spectroscopy Substrates Introduced
Ocean Optics has introduced a new substrate for Raman spectroscopy applications. The new RAM-SERS-SP Surface Enhanced Raman Spectroscopy substrates use a proprietary gold-silver nanosponge alloy to produce highly sensitive, trace-level Raman spectroscopy measurements. The applications for SERS range from detection of explosives and narcotics, to food safety, anti- counterfeit tagging and biological research.
SERS substrates amplify very weak Raman signals by many orders of magnitude. Fast, repeatable measurements of SERS-active analytes are possible even to parts-per-trillion levels.
Silver-only SERS substrates work best with 532 nm Raman excitation, and gold substrates are better suited to 785 nm Raman systems. By combining the silver and gold on one substrate, the new SERS nanosponge substrates perform well with either wavelength. Also, when used with 638 nm Raman excitation, the nanosponge substrates are enhanced to an even higher level of sensitivity.
RAM-SERS-SP nanosponge substrates are more robust than other options and handle the deposition of sensitive samples more effectively. The higher sensitivity of these substrates opens up new opportunities for SERS applications, particularly in addressing the growing need for fast, effective detection of explosives and pesticides.
The new substrates work with the complete range of Ocean Optics Raman instruments. For users to take full advantage of the RAM-SERS-SP nanosponge substrates’ sensitivity, Ocean Optics now offers 638 nm modular Raman solutions and 638 nm versions of its mini handheld IDRaman spectrometers.
Ocean Optics’ proprietary plasma deposition permits affordable mass production with high repeatability and customisation options. Standard substrates are microscope slide format with a 4 x 4 mm active area. Ocean Optics uses optical-grade borosilicate glass for compatibility with a wide range of solvents.
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REASON #8: Fast sample loading
Enjoy safe, fast and precise sample loading with EasyLoad™
.
Ergonomic, accurate sample positioning in WDXRF analyzer trays, and fail-safe operation with automatic recognition of loose powders and liquid samples.
www.bruker.com/S8TIGER-8 WDXRF
Why the S8 TIGER?
FAST
SAMPLE LOADING
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