Lamps coiled

FIGURE 39.20 Spectral energy distribution of infrared heat sources (A, quartz lamp coiled tungsten, 2200°C B, quartz tube coiled nickel chrome alloy, 1980°C C, metal sheath heater surface, 760°C D, Schwank gas infrared burner, 900°C E, electric panel heater, 430°C). (Courtesy of Fostoria Ind. Inc., Fostoria, OH.)... 

Figure 1. A, Dewar flask B, sintered glass filter C, metal cooling coil D, water inlet E, water outlet F, reaction vessel < , quartz immersion well /f, pyrex filter /, lamp ...

The generally very good electrical insulation properties coupled with heat resistance and non-burning behaviour indicate usage in coil bobbins, printed circuit boards (which resist heat of soldering), lamp bulb bases and TV... 

Fig. 1. Schematic of PAF-V. Key DM, drive motor SA, screw assembly RSA, reactant solution A RSB, reactant solution B DS, drive syringes SV, main switching valves PD, photodetector WB, water bath WA, waste FO, focusing optics M, monochrometer RS, receiving syringe DL, deuterium lamp TL, tungsten lamp ACS, adjustable cell support C, mixing/observation cell W, quartz windows A, reactant A entrance to cell B, reactant B entrance to cell E, product exit from cell RCS, rigid cell support T, a portion of the 4.6 m of coiled tubing not shown for clarity. Reproduced from Ref. (1) by permission of the Royal Society of Chemistry.

Photolysis Reactors and Ultraviolet Sources. For 253.7-m/ irradiation, a modified irradiation apparatus purchased from Delmar Co. was used. The reactor was a 2-necked, 500-ml., round-bottomed flask. One neck was an O-ring joint, and the other was a 24/40 joint. A 4- X 1-inch coiled low pressure mercury quartz lamp was placed inside the flask through the O-ring neck, and the joint was sealed with removable O-rings. The reactor was connected directly to the mass spectrometer by the 24/40 joint. The samples were placed inside the flask and irradiated internally. The O-ring was shielded from direct radiation so as not to induce degradation. The estimated output of the lamp was 30 watts, and the ambient temperature within the reactor during irradiation was 70°C. 

The damp powder is fed directly to the belt from a hopper containing an agitator, and drying is accomplished at a rate of 140 lb (53 kg) per drier per hour, at a temperature of 72°C. The air supplied is heated to about 50°C by steam coils, and the temperature in the tunnel rises due to the heat from the lamps. 

Fig. 4. Arrangement for the electron optical reproduction of a photo cathode [according to Mahl (32)] K photocathode, S fluorescent screen, A quartz lamp, B quartz window, M magnetic coils, C window for the direct observation of the cathode.

Transmission of Hod through Thin Plates.—The bodies employed by Mellon were a Locatelli s lamp, fixed as1 at a in Fig, 10 a coil of platinum kept at incandescence by the flame of alcohol, as seen in Fig. 12 a blackened copper foil fixed to a stend, and heated with a spirit lamp to 752°, as represented in Fig, 13 j and a brass canister filled with water kept at 212 , as shown in Fig, 14, One or other... 

In method (c), the NOC after HPLC separation was photolyzed by a UV lamp (254 10 nm), and the charged nitrite species was determined amperometrically (79). The denitrosation reaction was found to be dependent on the wavelength of the UV light, lamp intensity, exposure time, and pH of the solution. The effluent from the HPLC column was passed through a capillary PTFE tubing coiled around a 40-W mercury lamp. The electrochemical detector used permitted either single- or dual-mode detection corresponding, respectively, to detection limits of 60 pg and 20 pg for NDMA. The method was applied to the determination of NDMA in beer and of... 

Spare parts that are needed are compression fittings and ferrules, plunger and injector rotor seals, an extra plunger and seals, column filters, and injector needle port seals. If you do not use pacification, you might want to keep a set of check valves on hand. I always have one coil each of 0.01- and 0.02-in tubing in addition to my column blank. A replacement solvent inlet line with a porous stone is useful in case of corrosion. If you filter solvents, you need cellulose, nylon, and Teflon filters. You also need a back-up lamp for your detector. 

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