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Mikrochimica Acta | 1970

Mikrobestimmung von metallischem Aluminium in teiloxydierten Aluminium-Aufdampfschichten und von Siliziummonoxid in Siliziumoxid-Aufdampfschichten

Horst Neidhard; Friedrich Scholl

ZusammenfassungDie Mikrobestimmung von metallischem Aluminium und Siliziummonoxid in dünnen Aufdampfschichten wurde beschrieben. Bei der Umsetzung mit starken Laugen wird eine äquivalente Menge Wasserstoff freigesetzt. Diese wird mit einer Töpplerpumpe gesammelt und dann gaschromatographisch in einer Wärmeleitfähigkeitszelle gemessen. Fremdgase werden an einer Molekularsiebsäule abgetrennt. Fehlergrenze, Genauigkeit und Empfindlichkeit des Verfahrens werden erörtert.SummaryA description is given for the microdetermination of metallic aluminum and silicon monoxide in thin films condensed from the vapor phase. Byreaction with strong bases an equivalent amount of hydrogen is evolved. This is pumped off, collected by means of “Töpler pump” and determined by gas chromatography using a thermal conductivity cell. Other gases are separated by means of a 2 m molecularsieve column. Limit of error, accuracy and sensitivity of this method are discussed.


Archive | 1974

Electro-chemical sensor

Rudolf Pollner; Karl-Hermann Friese; Bernhard Topp; Horst Neidhard


Archive | 1976

Internal combustion exhaust catalytic reactor monitoring system

Horst Neidhard; Ernst Dipl Ing Linder; Josef Dipl Ing Wahl; Peter Schmidt; Peter A. Schoeck


Archive | 1974

Methods for producing oxygen-sensing element, particularly for use with internal combustion engine exhaust emission analysis

Bernhard Topp; Horst Neidhard; Rudolf Pollner; Karl-Hermann Friese


Archive | 1973

Exhaust gas oxygen-content measuring probe - for monitoring the performance of an exhaust gas detoxification unit

Horst Neidhard; Karl-Hermann Friese; Ernst Dipl Ing Linder


Archive | 1973

System for checking activity of catalytic reactors - signals bad functioning of such reactors and causes engine to run unstable

Peter A Dr Ing Schoeck; Ernst Dipl Ing Linder; Josef Dipl Ing Wahl; Peter-Juergen Dipl Ing Schmidt; Horst Neidhard


Archive | 1974

Exhaust gas operated apparatus for continuously measuring air number of engine intake mixture

Wolf Wessel; Ernst Dipl Ing Linder; Helmut Maurer; Horst Neidhard


Archive | 1974

Oxygen detector for exhaust gas has solid electrolyte tube - shielded from thermal shock and abrasion by catalyst particles

Ernst Dipl Ing Linder; Leo Steinke; Franz Rieger; Horst Neidhard


Archive | 1975

Probe for electrochemical determination of oxygen - in waste gases, esp. from IC engines

Kuno Kirner; Horst Neidhard; Karl-Hermann Friese; Rudolf Pollner; Wolf-Dieter Dipl Chem Haecker


Archive | 1973

Messfuehler fuer die ueberwachung der funktionsfaehigkeit von katalysatoren in abgasentgiftungsanlagen von brennkraftmaschinen

Horst Neidhard; Karl-Hermann Friese; Ernst Dipl Ing Linder

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