METHOD AND APPARATUS FOR DETERMINATION OF WATER AND FOR NORMAL PHASE LIQUID CHROMATOGRAPHY

A method for calibrating an analysis instrument, e.g., a gas chromatograph, for water analysis that includes four steps. The first step is to continuously remove water from a liquid that contains water to produce a liquid containing a reduced amount of water such as by membrane pervaporation. The se...

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Bibliographische Detailangaben
Hauptverfasser:	LARSON, JEFFREY, R, FRAWLEY, NILE, N, KIEFER, JOSEPH, J, DITTENHAFFER, MARK, L, ERSKINE, STEVEN, R, BEACH, MARK, W
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TESTING
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Beschreibung
Zusammenfassung:	A method for calibrating an analysis instrument, e.g., a gas chromatograph, for water analysis that includes four steps. The first step is to continuously remove water from a liquid that contains water to produce a liquid containing a reduced amount of water such as by membrane pervaporation. The second step is to analyze the liquid containing a reduced amount of water for water by a reference water analysis method such as by Karl Fischer titration. The third step is to analyze the stream of liquid containing a reduced amount of water using the instrument to be calibrated, e.g., a gas chromatograph having a helium photoionization pulse discharge detector. The fourth step is to calibrate the instrument using the analysis of the second step. In a related embodiment, a system for normal phase chromatography. L'invention concerne un procédé d'étalonnage d'instrument d'analyse (par exemple, chromatographe en phase gazeuse) destiné à l'analyse de l'eau, qui comprend les quatre étapes suivantes: premièrement, extraction en continu de l'eau contenue dans un liquide, pour préparer un liquide à teneur réduite en eau, par exemple en pervaporation par membrane; deuxièmement, analyse du liquide à teneur réduite en eau, par une méthode de référence, du type titrage de Karl Fischer; troisièmement, analyse du flux de liquide à teneur réduite en eau au moyen d'un instrument à étalonner, du type chromatographe à détecteur de décharge d'impulsions de photoionisation d'hélium; quatrièmement, étalonnage de l'instrument par le biais de l'analyse correspondant à la deuxième étape. Selon une variante connexe, l'invention concerne un système de chromatographie en phase normale.