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.

AN131: Determination of Transition Metals at PPT Levels in High-Purity Water and SC2 (D-clean) Baths

Instrument Type: IC

Semiconductor cleaning solutions used to remove potentially damaging transition metal contamination are monitored to assess cleaning efficiency. Here trace concentrations (ng/L) of transition metals in semiconductor cleaning solutions and deionized water are separated using the strong complexing agent, pyridine-2,6-dicarboxylic acid (PDCA), on an IonPac CS5A column optimized with anion- and cation-exchange chemistry. Then a post-column derivitization agent, 4-(2- pyridilazo)resorcinol (PAR), is added to displace PDCA and to facilitate detection at 520–530 nm.

AN277: Fast and Sensitive Determination of Transition Metals in Power Industry Waters Using Ion Chromatography

Instrument Type: IC

This study describes the separation of iron (III), copper (II), nickel (II), and zinc (II) complexes with PDCA followed by postcolumn PAR reaction and absorbance detection at 530 nm. Surrogate samples include spiked deionized (DI) water (Boiling Water Reactor (BWR) surrogate) and spiked borated water containing lithium hydroxide with or without added zinc (Pressurized Water Reactor (PWR) surrogates).