Determination of Oxalate in Urine by Ion Chromatography

Application Note 107 Ions In Physiological Fluids INTRODUCTION Ion chromatography (IC) has gained wide acceptance over the last twenty years. Advances in column technology and detection schemes have led to ion chromatography applications in a wide variety of matrices and…

I ~ '1 .DIONE! Application Note AN 69 April 1991 Determination of Aluminum in Complex Matrices Using Chelation Ion Chromatography INTRODUCTION RECOMMENDED EQUIPMENT The detenninationof tracemetalsin complexmatriceshas traditionally beena difficult analyticalchallenge. High levels of interfering species,combinedwith non-specificity Dionex GradientPumpModule (GPM)…

. TechnicalNote D ION E X TN 23 August 1991 INTRODUCTION its relativestability with HIBA. This secondaryequilibrium In aqueoussolution,lanthanidemetalsarepresentastrivalent cations.Becausethe ionic propertiesaresimilar,they cannotbe separated easilyby cationexchangeastrivalentcations.However, the selectivityof the ionscanbe increasedwith the useof appropriatechelatingagentssuchasa-hydroxyisobutyricacid (HIBA). permitsthe separationof the lanthanidesbecauseeachlanthanide hasa…

, ~ .~ _DIONEX Application Note AN70 Feb 1991 Choline and Acetylcholine INTRODl/CTION Choline and acetylcholine(Figure 1) arequaternaryammonium cationswhich arenotedfor their activities asneurotransmitters. in physiologicalmaterials, . II . Concentrations . especla y In neuraltIssues,often are determinedwhen b.10C hemlcal . pathwaysanddetermining…