Nitrogen ultra-high-purity

Nitrogen - Ordinary. High purity. Ultra pure... 

Ultra-pure Nitrogen Generator Nitrogen Production Krypton and Xenon from Air Ultra-High-Purity Oxygen Foods... 

Ultra high purity N2 (ca. 50 mL) was added after each sampling to restore pressure to the reactor. Each sample was cooled to room temperature in an ice bath, the pH measured and the sample extracted with 3x5 mL of dichloromethane (EM Science, Gibbstown, NJ) containing 500 ppm of 4-methylthiazole (Aldrich Chemical, Milwaukee, WI) as an internal standard in a 150 mL separatory funnel. The dichloromethane fraction was dried with anhydrous magnesium sulfate (Fisher Scientific, Fairlawn, NJ), filtered and evaporated to 0.5 to 1.0 mL volume under a stream of high purity nitrogen. 

Ultra-high purity, 99.999 %, nitrogen and helium gases were used as supplied by CIG, Adelaide, Australia. 

We measured the coefficient of thermal expansion, CTE, of RX-55-AE-5 using a TA Instruments Model 2940 TMA that was controlled by a TA 500 Thermal Analyzer equipped with a TMA Mechanical Cooling Accessory [6,7]. A quartz micro-expansion probe sat on top of all samples with a force of 0.01 Newtons (N). The change in the length of the sample was as it was heated or cooled was measured by a linear transformer that converted the vertical distance of the quartz motion probe and was recorded by the TA Instrument software. Ultra high purity nitrogen carrier gas was used at a constant flow rate of 100 cm /min. Samples were heated at a linear heating rate of 3°C /min. 

Diffuse reflectance infra-red spectroscopy (DRIFT) was used to characterize the powder surface chemistry and powder surface-dispersant interaction. The unexposed samples were transferred to the FTIR ultra high purity nitrogen purged sample chamber with minimal air exposure. The exposed samples were run under dry air conditions. 02-exposed powder was analyzed with the same procedure used for unexposed powder. 

A saturated solution of OBOCMC8 and C60/ OBOCMC8 was prepared in ultra pure HCIO4 solution (0.1 M) and deionized water. The authors deaerated the solutions with high-purity nitrogen before carrying out the experiments. 

The nanocrystalline Ceo powder was prepared by the inert gas condensation method. Cgo purified by high performance liquid chromatography was evaporated in a helium (purity 99.9999%) atmosphere at 1.3 kPa. Ultra fine particles were collected on the surface of a stainless steel cylinder cooled by liquid nitrogen. The average grain size of nanocrystalline C o was determined to be approximately 50 nm by TEM. A mixture of nanocrystalline C o and carbon powder C(a. C powder = 6 4) was packed in a silver sheath and drawn to produce a multicore wire, as shown in Fig. 14.3. In the first step, the mixture packed in the sheath was drawn to produce a hexagonal shaped wire with a diameter of 1mm. Next, seven such wires were closely packed in another... 

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