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TN27: Determination of Lanthanide Metals in Digested Rock Samples by Chelation Ion Chromatography

Instrument Type: IC

A technique called chelation ion chromatography (chelation IC) was developed for the determination of transition and lanthanide metals in complex matrices. The sample pretreatment system (chelation concentration) coupled directly to the ion chromatograph offers the analyst a solution to the detection limit and interference problems commonly experienced when analyzing complex matrices.

AU168: Determination of Transition Metals in Complex Matrices

Instrument Type: IC

Chelation ion chromatography facilitates the determination of low concentrations (μg/L and lower) of transition metals in samples including seawater, brines, estuarine waters, and a variety of biological samples. Here, the authors simplify the system configuration described in Technical Note 25, using an ICS-3000 system. The separation has also been updated to include the IonPac CS5A/CG5A column set, which demonstrates improved selectivity and peak efficiency for separation of transition metals compared to the CS5.

AU158: Determination of Manganese in Brine

Instrument Type: IC

Sodium chloride brines are used in chlor-alkali cells and must have low concentrations of alkali and alkaline earth metals to prevent membrane poisoning. When brines are prepared from seawater, the manganese concentration is also a concern. This application update uses the same separation conditions as AN 120, but alters the online sample preparation with the MetPac column to effectively concentrate manganese from 10 times more sample than used in AN 120.

AN69: Determination of Aluminum in Complex Matrices Using Chelation Ion Chromatography

Instrument Type: IC

Determination of trace metals in complex matrices has been a difficult analytical challenge. This application note describes the extension of Chelation ion chromatography for the analytical determination of aluminum in complex matrices. This technique allows aluminum to be preconcentrated from matrices high in salts, acids, or bases. Following selective concentration, aluminum is eluted to a conventional cation exchange column for separation from other transition metals. Selective detection is accomplished using post-column derivatization with Tiron and subsequent UV detection at 310 nm.