Apparatus for the determination of bond forms of gases

Apparatus for the determination of bond forms of gases, such as a sample containing oxygen or nitrogen in solid or liquid small metal samples e.g. from 0.8 to 1.2 g comprising:

• a furnace for heating the sample continuously to elevate the temperature thereof to a temperature of about 3000.degree. C. maximum in less than five minutes to release gases from the sample, said furnace comprising a control device for presetting a constant heating rate of the sample for the constant heating thereof at a value between 20.degree. C./sec and 350.degree. C./sec,
• a gas analyzer operatively coupled to said furnace from which the gas released during heating is supplied continuously for picking up the gas released during heating by said furnace, said gas analyzer indicating as a function of this supplied gas the quantities of the gas released in equal periods of time, and
• a computer operatively coupled to said furnace and to said gas analyzer,
• said gas analyzer providing as an output, a measured value sequence in the form of an oxide spectrum curve or Evologram characteristic thereof for the gas quantities released per unit time to said computer for the determination of the bond forms of the gases contained in the sample,
• said computer detecting the desired values from the characteristic curve and forming a first derivative curve and a second derivative curve from the said measured value curve or Evologram corresponding to the entered measured value sequence, for forming subtotals of these measured values between successive points in a minimum position and/or points which occur as a second inflection point immediately after a first inflection point on the measured value curve or, these positions, minima, inflection point after inflection point being identified from the first and second derivatives of the measured value curve by zero indications and extreme positions.