spektrometria mas

We describe the use of a simple voltage stabilizer that controls filament temperature, Tp in the ion source of a thermal ionization mass spectrometer (TIMS). The filament voltage, Vp is measured by means of a separate pair of wires connected inside of the ion source in parallel to the wires supplying power. It has been demonstrated that V^.is directly proportional to T^-in a wide range of filament temperature. The T(. value is solely controlled by the reference voltage, V^, which can be manually selected from a voltage divider or by means of a computer. The temperature controller described here is succes-fully applied for analysis of potassium concentration by the isotope dilution method.

Time of flight mass spectrometry (TOF-MS) is a common technique used to resolve mass difference of ions. The main advantages of such systems are practically unlimited mass range, straightforward construction and possibility of high masses of molecules detection. This work presents construction and measurement parameters of the time of flight mass spectrometer built in the Division of Applied Physics, Institute of Physics, Maria Curie-Sktodowska University.