PurityPlus® Grade 6.0 Gases by GTW: Increased Production, Lower Costs Those who use critical gases insist on high-quality Carrier Gases for chromatography and any application involving analytics. Manufacturing these gases had better be foremost among the skill sets of any specialty gas supplier. For something like forty years or so, both the narrow detection capabilities of common technology and constantly advancing analytical methods have rightly put more demand on these gases. The gas specifications widely sanctioned in the 1970s might well be insufficient for 21st century needs. Meeting and exceeding upgraded specs requires a steady investment by the gas supplier – in instrumentation and purification equipment, in education to obtain maximum performance from these vehicles, and in continuous review, testing, and affirmation of manufacturing and quality processes. So that we can continue anticipating your needs, we’re increasing our ability to create and certify the gases you require in the 21st century. So what are you purchasing? And what are you measuring? And what’s the point, really, of acquiring the highest-purity gas you can afford? Let’s examine the PurityPlus Specifications. PurityPlus Helium, UHP, 5.0 Ultra Carrier, 5.5 Chromatographic, 6.0 Minimum Purity 99.999% 99.9995% 99.9999% Oxygen < 2 ppm < 1 ppm < 0.5 ppm Moisture < 2 ppm < 1 ppm < 1 ppm Hydrocarbons <0.5 ppm < 0.5 ppm < 0.2 ppm Nitrogen < 4 ppm < 1 ppm Carbon Monoxide < 0.1 ppm Carbon Dioxide <0.1 ppmWhat can we glean from these specs? If you’re process measuring with components in percentage ranges, 5.0 gases are generally acceptable. If you’re measuring impurities in the 10–1,000 ppm range, you’ll get a flatter baseline and more exacting measurements using 5.5 gases. And if you’re engaged in contaminant detection and quantification below 10 ppm, you’d be better served using 6.0. In any event, recognizing standards isn’t all there is to it. There’s also our process]86]. Are your cylinders pre-treated to avoid later contamination from sidewall corrosion and degassing? Ours are. Are the instruments used to verify these specifications continually calibrated using traceable standards? Ours are. And can this calibration be documented? Ours can. If you’re a Western Michigan user of high-purity gases, PurityPlus® by GTW should be your first choice. We’ve invested heavily in tools and people. We actively participate in a broad round-robin program to verify our capabilities. We regularly audit ourselves by benchmarking against other producers and turning to a third-party auditing group to analyze us. And, unlike a good share of our competitors, we can provide for your gas requirements locally – doing everything from fielding whatever questions you have, to creating and delivering your gases and equipment, to resolving any misunderstanding or error no matter how improbable. Look over every option you have. Then call GTW today at 616-754-6120 or contact us online. We can serve all of your specialty gas needs from right here in Western Michigan!