This page contains a Flash digital edition of a book.

NEW benchtop NMR system launched O

ne of the leading providers of compact NMR and MRI instruments, Magritek, has

launched the Spinsolve Ultra Benchtop NMR system. Using the company’s high homogeneity Halbach magnets, the system delivers ultra-high field homogeneity (50% 0.2Hz, 0.55% 6Hz, 0.11% 12Hz) which, when combined with solvent suppression, permits users to resolve compounds dissolved at sub-millimolar concentrations in mixtures such as beverages, fermentations, wastewater and biological fluids in just eight minutes. No sample preparation is required for the measurement. Spinsolve Ultra is available with multiple

different nuclei to give users the possibilities to have a system configured specifically to their requirements. All models measure 1H and 19F nuclei but the multinuclear versions offer a third, optional nuclei that can be 7Li, 11B, 13C, 15N, 29Si or 31P. Users may also ask for the availability of

other nuclei. The unit also includes solvent suppression pulse sequences to strongly reduce the signal of protonated solvents that can be more than three orders of magnitude larger than the signals of interest being measured. Spinsolve Ultra models are available at a choice of operating frequency: 43MHz or 60MHz (for 1H). Furthermore, top class results are produced with no sample spinning, no requirement for compressed air and no need for reference deconvolution data processing. The high homogeneity of the

Spinsolve Ultra is particularly useful for samples where the compounds to be identified and quantified are dissolved in protonated solvents such as water. Among important applications are the

following: the quantification of sugars and alcohol in beverages; the identification and quantification of metabolites in urine; the analysis of contaminants in wastewater; fermentation processes in bioreactors. In general, the high resolution offered by the Spinsolve Ultra is of great advantage for monitoring chemical reactions performed in the presence of protonated solvents and for qNMR of samples where important signals overlap.

For more information visit


cean Optics has shown how highly sensitive, trace-level Raman spectroscopy measurements can detect concentrations of insecticide that are less than a 50th of the level judged harmful to honeybees. Using a real-world example related

to the problem of honeybee population decline, the company demonstrated the power of Ram-SERS-SP Surface-Enhanced Raman Spectroscopy substrates’ gold-silver nanosponge alloy. By comparing the ability of new gold-silver substrates with that of traditional substrates to detect imidacloprid, an insecticide suspected to be dangerous to bee colonies, Ocean Optics scientists were able to demonstrate the enhanced sensitivity that Ram-SERS-SP substrates bring to Raman measurements. SERS substrates amplify very weak

Raman signals by many orders of magnitude, with measurements of SERS- active analytes possible at even parts-per- trillion levels. Silver-only SERS substrates work best with 532nm Raman excitation, while gold substrates are better suited to

785nm Raman systems. By combining the silver and gold on one substrate the new SERS nanosponge substrates perform well with either wavelength. When used with 638nm Raman excitation, the nanosponge substrates are enhanced to an even higher level of sensitivity. In the USA, recent increasing rates of

honeybee loss have been investigated by government regulators and other researchers. According to ongoing US Environmental Protection Agency (EPA) studies, the insecticide imidacloprid has been identified as a threat to commercial honeybee colonies, with the agency citing

traces at concentration levels greater than 25 ppb as likely harmful to honeybees. To test the effectiveness of Ocean Optics

substrates in detecting imidacloprid at these harmful trace levels, the company’s scientists set up a lab experiment using its gold nanoparticle and gold-silver nanosponge SERS substrates. They made a series of measurements using the gold nanoparticle substrates, in a setup with 785nm Raman laser excitation, and a series of measurements using the gold-silver nanosponge substrates, in a setup with 638nm Raman excitation. In the test, the gold-silver nanosponge SERS substrates delivered the best results, detecting imidacloprid concentrations as low as 0.4 ppb (well within the 25 ppb concentration rate cited by the EPA as harmful to bees). The substrates’ high sensitivity and low background noise made it easier to discern Raman peaks at these very low-concentration levels.

For more information visit

Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76