Fisher burner

The system is evacuated for 1 hour at 1 to 2 mm., while the furnace is heated to 500° and maintained within the range 500 to 525°. The ice bath is removed, and slow sublimation of the iodine into the aluminum is initiated by means of a Bunsen burner flame. Thereafter the rate of sublimation of the iodine is increased, and a Fisher burner is used during the latter stages of the transfer the total time for introduction of the iodine onto the aluminum is approximately 1 hour. 

Fortunately, the use of oil lamps is now neither common nor necessary. Although there are modem substitutes for oil lamps, such as Bunsen and Fisher burners, they are not the heating mechanism of choice because most heating is done by electric mantels and stirrer/hot plates. There are too many drawbacks associated with open-flame heat sources for them to be considered the heat source of choice. The problems associated with these burners include the following ... 

The main difference between the Fisher burner and the Bunsen burner is size and heat dispersion. When trying to heat a test tube in a Fisher burner, you are likely to overheat the material. Likewise, when trying to heat a two-liter flask with a Bunsen burner, you are likely to have a long wait. The exact demarcation line of which tool you should use for which type of heating job requires common sense and experience. 

There are operations in the laboratory that require more flame heat than a Bunsen or Fisher burner can provide. For example, if you wish to fire-polish the end of a chipped glass tube or seal off (also called tip off ) a sample for NMR study, you will need to use a gas-oxygen torch. 

Wire gauze, pipe-clay triangles, Bunsen burner, a Meker or Fisher burner... 

Fisher burner. A Fisher burner (or Meker burner), shown in FIGURE D.3.a, attains slightly higher temperatures (about 1200°C) than a Bunsen burner and can provide up to twice the heat output of a Bunsen burner. A... 

Fisher burner has a stainless steel grid at the top that channels the flame... 

The same procedure is used for fire-polishing borosilicate glass tubing except that it is rolled backward and forward at the edge of the hot, upper, darker blue flame of a Fisher burner as shown in FIGURE 1.3. 

Heat end In hot upper zone of nonluminous Fisher burner flame until edges are slightly rounded. 

How do you adjust a Fisher burner to obtain a very hot nonluminous flame ... 

Total Oxide, RO2. An aliquot of the zirconium hafnium solution that will provide approximately 0.5 g. of the ignited oxide is diluted with water to 100 ml. and treated with ammonium hydroxide to precipitate the mixed hydroxides. The precipitate is filtered on quantitative paper, washed free of sulfate, placed in a weighed crucible, and ignited (900°) to constant weight in a muffle furnace or over a Fisher burner. 

A suitable aliquot is pipetted onto a platinum (or stainless steel) plate and evaporated to dryness under an infrared heat lamp. The plate containing the evaporated sample aliquot is heated to a dull red heat over a Fisher burner to destroy organic matter and counted in a stiitable alpha coimter. In this laboratory, the methane flow proportional alpha counter is used almost exclusively. 

Block for holding centrifuge tubes Fisher burner Heat lamp... 

Equipment Drying oven Centrifuge Fisher burner... 

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