Nitrogen, sampling

A) The density of the nitrogen sample is less than the density of the argon sample. 

Compressed air and nitrogen samples showed conform results. 

Irradiation conditions and procedures have been described (23), except that the irradiation cell in these experiments was flushed continuously with nitrogen. Samples, where noted, were annealed at 100 °C. for 30 minutes immediately after irradiation. 

Procedures. A standard recipe for the latex preparation is shown below (St + M2) 20 g, (water + buffer) 160 g, and initiator 5 mmole/1. The weight fraction of M2 in monomer charge (f) was varied from 0.01 to 0.50. Polymerizations were carried out at 55°C or 70°C and pH 2.5 or 9.0 under nitrogen. Samples were withdrawn from the reaction mixture at various time intervals and the polymer was precipitated in an excess of acetone. The conversion and polymer composition were determined by gravimetric means and by elemental analysis, respectively. The M2 fraction in instantaneously-formed copolymer ( Fi ) was calculated from eq. 1 ... 

Fig. 12. Thermal behavior of H3[PMo1204ol 16.5 H20 in nitrogen (sample weight for tga = 0.3062)...

Fig. 12. The thermal decomposition of (NH4)2Mo02S2 under nitrogen (sample weight 134.9 mg)...

Figure 15. Cinegram of reaction-wave propagation on scratching the surface of a film produced from solution of Cl2 in BC. The film was immersed in liquid nitrogen. Sample thickness 80 /mi, dose 72.5 kGy.

Thermograms of(Rb,TMA) offretite crystals in oxygen and nitrogen. Sample weight 15.15 mg. Heating rate 10 °C/min. Gas flow rate ... 

Powdered glass, intimately mixed with the tetrafluoride was heated at increasing temperatures in a nickel boat under nitrogen. Samples were taken for X-ray examination at 50° intervals. There was no change below 350°, the photographs then indicated some decomposition to platinum. There was no evidence of lower fluorides. 

A nitrogen sample occupies 447 mL at STP. If the same sample were collected over water at 25°C and 750. torr, what would be the volume of the gas sample ... 

Fresh tomatoes were cubed and immediately frozen in liquid nitrogen. Samples were lyophilized. The dried tomatoes were then ground and sieved through a 0.5-mm screen. 

Figure 1. Particleboard elution by dry nitrogen sample geometry effects (o shredded 1.0 NCM. A A 25x25x16 mm 0.5 NCM duplicate runs. P = Perforator value in mg/100 g dry board/measured on starting material at " 6 pet moisture content.) (ML85 5428)...

Figure 1. Differential thermal analysis of polyphenylene sulfide in nitrogen. Sample A melted under nitrogen and quenched before DTA. Sample B heated at 370°C in air 4 hrs and quenched before DTA. Heating ratet 10° C /minute.

The operating conditions were injection temperature 150°C, detector temperature 250°C, carrier gas nitrogen. Sample sizes were used 1.0 pi and manual type of injection. 

March 1987 as a result of the investigations, cold nitrogen sampling in the mter-vessel space did not reveal any traces of sodium Nevertheless, the balances for the sodium levels of the drum and the storage tank show that there are 20 m of sodium between the vessels... 

Glass Transition Temperatures (T ) were determined by DSC using the DuPont 990 thermal analysis system. Specific details of the analysis were atmosphere nitrogen sample size 2-10 mg,... 

Automatic systems have been developed and are largely used in the simultaneous analysis of carbon, hydrogen, and nitrogen. Samples (up to 20) of 50-100 mg are burned and the evolved gases, CO2,... 

The sample molecules are exdted by an external micro-wave energy sovuce and emit ultraviolet electromagnetic radiation at specific wavelengths 297.7, 298.3, and 298.9 mn, corresponding to the nitrogen isotopomers above. Ratios of the intensities at these wavelengths are related to the isotopic composition of the nitrogen sample. 

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