5.5 where the number before the dot represents the number of nines and the last number indicates the last decimal (5.5 = 99,9995% or 6.0 = 99,9999%) Purity classification is normally written in two ways:Īs a quality code, e.g. BUT: 100% purity cannot be achieved due to the manufacturing process. Impurity can be defined as a material or substance in the finished product that differs from the chemical composition of the requested material or compound. “Purity is the absence of impurity in a substance” The maybe simpliest and most accurate definition of purity is: Even if this should occur repeatedly, it should nevertheless not be taken as any assurance of uniformly higher purities. It does not apply to "Gases in Small Containers".Ĭylinder fillings frequently display purities that are higher than those which have been guaranteed. This is noted for the gas purities to which it applies. In the case of a number of high purity gases, every filled cylinder is accompanied by a certificate of analysis confirming that the maximum limits for impurities have not been exceeded. In the case of gases without details on impurities, the specification of their purity is to be seen as a typical value. The specific limits for the impurities are not exceeded. The minimum purity of a gas refers to the specified impurities that characterize the pure gas. But what is purity? How can one define it? When we talk about specialty gases and HiQ ® purity is mentioned very often. Linde Green: Pioneering liquefied gases with without carbon footprintĥ Tips for the Care and Use of Your Engine Driven Welder During the Winter Pure oxygen for efficient ozone generationįull service H2 concept for the marine sector Neutralisation and remineralisation with carbon dioxide Innovation Centre for Aquaculture & Water Treatment We supply compressed and synthetic air in a variety of cylinder types and sizes to meet your individual purity and volume demands.Materials & Technologies for Semiconductors Compared with an oxyfuel flame, it gives welders greater control over the thickness of the carbon coat.Ĭompressed air is also used for pneumatic drills, plasma cutting and metallurgical processes such as die casting and blast furnaces. An air-fuel flame is suitable for brazing, soldering and carbon coating lower-temperature alloys. When combined with a fuel gas, compressed air produces a flame with a lower temperature than an oxyfuel flame. Regular ambient air can also be compressed for a variety of applications where ultra-high purity is not critical. Other applications include medical gas mixtures and atomic absorption flame spectrometry. It is also used as an oxidiser for flame ionisation detectors in laboratory research and development. In fact, it is used as a balance gas in many calibration mixtures. Synthetic Airīecause of its purity, synthetic air is used as a zero gas in the running and calibration of environmental monitoring and test equipment. This is produced by mixing pure oxygen (20%) with pure nitrogen (80%). As regular ambient air contains a number of impurities, synthetic air is the preferred choice for these applications. Some of these applications call for extremely high levels of purity. PLASTINUM Dynamic Temperature Control with CO₂Īs a source of oxygen, air is essential for combustion, respiration, decay and various industrial processes – including oxidation. PLASTINUM Gas Injection Moulding with Inner Cooling PLASTINUM Gas Injection Moulding with CO₂ SOLVOX® aquaculture hose & ceramic diffuser Hydrogen Applications for Chemical Production Pure oxygen for efficient ozone generationĪdvanced Temperature Control of Injection Moulds Inerting, purging, sparging, pressure transfer Heating, Ventilation & Air Conditioning (HVAC)
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