https://www.jeolusa.com/RESOURCES/Analytical-Instruments/Documents-Downloadshttps://www.jeolusa.com/RESOURCES/Analytical-Instruments/Documents-Downloads/detecting-the-color-chemicals-in-autumn-leaves-by-using-the-ambient-ionization-toolbox9. MiscellaneousTue, 27 Oct 2020 13:06:12 GMT

Some of the characteristic compounds that are responsible for the bright colors of autumn leaves are readily detected by using various ambient ionization methods with the AccuTOF-DART mass spectrometer system.

<p>The AccuTOF-DART Ambient Ionization Toolbox® provides multiple methods for chemical analysis with ambient ionization, without having to change ion sources. This makes it fast and easy to characterize chemical compounds with different polarities and chemical structures, such as the chemical compounds that produce the bright colors of autumn leaves.</p> <p>For the leaf extracts, Argon DART with chlorobenzene dopant was highly selective for detecting conjugated nonpolar compounds such as phytosterols and carotenoids. PaperSpray and MAIV were effective for detecting charged and polar compounds such as chlorophyll and anthocyanins.</p> https://www.jeolusa.com/RESOURCES/Analytical-Instruments/Documents-Downloads/gold-star-mothers-stamp-analysis-using-scanning-electron-microscopy-and-mass-spectrometryYokogushi (Cross-platform Analysis)Thu, 05 Mar 2020 16:42:17 GMT

Since 1949, the JEOL legacy has been one of outstanding innovation in developing instruments used to advance scientific research and technology. JEOL has over 60 years of expertise in the field of electron microscopy, more than 50 years in mass spectrometry. In this applications note, we performed an analysis of a Gold Star Mothers Postage Stamp by using three JEOL instruments. We used the JSM-IT300LV which the latest addition to JEOL‘s popular series of analytical low vacuum SEM, , the JMS-T100LP “AccuTOF- DART” the first commercially available ambient ionization mass spectrometer, and the JMS-S3000 “SpiralTOF” which has highest mass-resolution and mass accuracy of all commercially available MALDI-TOFMS systems. We can therefore correlate analyses from various analytical techniques on the same sample.

<h3>Experimental:</h3> <p>A <em>Gold Star Mothers Stamp</em> from 1948 has a lead chromate pigment that we analyzed via: the JSM-IT300LV with an EDS spectrometer, the JMS-T100LP “AccuTOF DART” and the JMS-S3000 “SpiralTOF”.</p> https://www.jeolusa.com/RESOURCES/Analytical-Instruments/Documents-Downloads/paperspray-accessory-for-accutof-lp-and-accutof-dart-systems8. PaperSprayWed, 04 Mar 2020 14:49:23 GMT

Samples and a polar solvent such as methanol are deposited onto a porous substrate such as filter paper or chromatography paper cut into a triangle. When a high voltage (typically ~3000V) is applied, Electrospray Ionization (ESI) occurs at the tip of the paper triangle. PaperSpray is simpler than ESI and does not require a pump, spray needle, desolvating gas or precise alignment.

<h3>PaperSpray Ionization</h3> <ul> <li>Rapid and convenient ambient analysis of compounds that can be analyzed by electrospray ionization</li> <li>No pump</li> <li>No tubing or connectors</li> <li>No spray needle or gas connections</li> <li>Disposable paper triangles eliminate sample carryover problems</li> </ul>