We recommend to load 100 mg of Indiana Zinc in a Pyrex® or Kimax® glass ampoule with an outer diameter of 6 mm and a length of approximately 20 cm. 100 milligrams of Indiana Zinc are sufficient for complete reaction with 2 microliters of water (i.e. 2 mg).
After pre-heating of Indiana Zinc in vacuum at 350 ºC for at least five minutes, a metallic mirror of sublimated zinc should have precipitated inside of the glass tube above the heated zone. Failure to notice this mirror indicates either poor vacuum or low temperature, or both. Insufficient pre-heating may cause an increased hydrogen blank.
 
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