Application Spotlight rinse tubing to be used so that a constant flow to the plasma can be achieved throughout the analysis. The performance of the Niagara CM Rapid Rinse was highlighted in our June 2016 Newsletter.12 The typical time saved with the Niagara is around 30% as shown in Figure 15. Niagara CM Rapid Rinse Accessory Table 2. With the Niagara you also minimize the amount of sample introduced into the plasma, since the valve switches immediately after the read is complete directing excess sample to waste, bypassing the sample introduction system. This feature can drastically reduce your consumables costs, particularly for challenging sample matrices like high TDS where the ICP torch and/or ICP-MS cones require frequent cleaning and suffer from a shorter life. Table 2. Method timing with and without the Niagara Rapid Rinse Without Niagara Rapid Rinse With Niagara Rapid Rinse Total Time (sec) 200 129 Improvement N/A 35% Samples per hour 18 28 ICP-MS Cones When dealing with a high TDS matrix analyzed by ICP-MS, Pt cones are often preferred in place of Ni. The Pt insert runs hotter than Ni, which slows the build-up of salts at the orifice. This allows the ICP-MS analyst to run for longer periods of time before cone maintenance is required. Unlike Ni cones, Pt cones can be economically refurbished several times, as long as the orifice and tip are still in reasonably good condition. This provides a high TDS ICP-MS laboratory with a significant cost savings. Glass Expansion manufactures ICP-MS cones to the same exacting standards as all of our products and they are guaranteed to perform to your satisfaction. Our manufacturing plant includes four CNC machines and an electron beam welder allowing us to provide you with the tightest manufacturing specifications. We supply cones for all of the popular ICP-MS models including the Agilent 7500, 7700, 7800, 7900 8800 and 8900, the PerkinElmer Elan and NexION, and the Thermo Fisher X Series, Element and iCAP Q. We also provide a Free Pt refurbishment service; visit the Glass Expansion website to learn more. Maintenance Procedures Nebulizer To keep your nebulizer in good condition, always finish a run by nebulizing a mildly acidic blank solution followed by deionized water for several minutes. This ensures that sample deposits do not form inside the nebulizer when the solvent dries out. If the nebulizer becomes blocked with salt build-up, the Eluo Nebulizer Cleaning Tool provides a safe and convenient way to remove the blockage from your Glass Expansion nebulizer. Never attempt to remove a blockage with wires or probes; irreparable damage is likely to result. Glass Expansion Eluo designs: • Eluo for glass concentric nebulizers (SeaSpray, Conikal, MicroMist, Slurry) – P/N 70-ELUO • Eluo for inert concentric nebulizers (OpalMist, DuraMist, PolyCon) – P/N 70-ELUO-OPD If there are salt deposits that cannot be removed with a quick backflush using the Eluo, we recommend the following procedure: 1. Initially flush your nebulizer with warm water* using the Eluo. 2. Soak the nebulizer tip in a 25% solution of Fluka RBS-25 (P/N FLUKA25) for 24 hours. Use the Eluo to make sure the Fluka RBS-25 solution fills the nebulizer. An initial flush of 25% Fluka using the Eluo may be required. 3. After 24 hours, flush the nebulizer 3 times with warm water* using the Eluo. 4. Stubborn deposits may require an additional soaking for 2 hours with a 5% nitric acid solution. 5. Flush 3 times with warm water* using the Eluo. 6. For faster drying, flush again with methanol. * Warm water only recommended for use with glass or quartz nebulizers. A helpful video tutorial on nebulizer maintenance using the Eluo can be found at: https://youtu.be/587QFobdQgE Particulates In order to prevent any issues with clogs or blockages due to particulates (undissolved solids in your samples), install a re-usable Inline particle filter (P/N 70-803-1108) which provides a simple and effective way to eliminate the risk of particulates getting trapped in your nebulizer or sample capillary tubing. It incorporates a re-usable 120 micron PEEK filter and is suitable for use with 1/16 inch (1.6mm) or 1.3mm OD sample tubing. The filter can easily be cleaned by back-flushing using an adaptor (P/N 70-803-1160) connected to the Eluo Nebulizer Cleaning Tool. The best cleaning procedure for the inline filter is to do a quick soak (~5min) in a 25% Fluka RBS-25 solution, sonicate the assembly for ~5min, then backflush 3 times with warm DI water using the Eluo tool and back flushing adapter. If you do not wish to use the Fluka RBS- 25, a similar glassware cleaner, or even dilute acid will help. Glass Expansion’s Quality Assurance Kit (P/N KT-1136) combines the re-usable inline filter, back flushing adapter, Eluo nebulizer cleaner and TruFlo sample monitor providing your ICP laboratory with all the tools necessary to protect and maintain your ICP nebulizer. The addition of the TruFlo sample monitor provides a continuous www.geicp.com Glass Expansion Newsletter | Issue 43 6
GE Newsletter June 2017
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