Application note describes the use of reagent-free ion chromatography and electrolytic eluent generation for routine determination of inorganic anions in environmental and drinking waters
Dionex introduces a new application note.
'Determination of inorganic anions in environmental waters using a hydroxide-selective column'.
The document, application note 154, describes the use of Reagent-Free IC (RFIC) with an IonPac AS18 column and electrolytic eluent generation as an improved approach to the routine determination of inorganic anions in environmental and drinking waters.
The AS18 column provides improved retention for fluoride from the column void volume, overall improved selectivity, and a significantly higher capacity compared to the AS4A column specified in US EPA method 300.0. Quantitative recoveries are obtained for all common inorganic anions spiked into typical environmental waters.
In addition, RFIC electrolytic generation of potassium hydroxide eliminates the need to manually prepare eluents, increasing the level of automation, ease of use of the IC system, and data reproducibility.
This RFIC approach to US EPA method 300.0 allows improved method performance for resolution, linearity, precision, and method detection limits.
The use of hydroxide eluents in US EPA Method 300.0 and 300.1 has been determined by the US EPA Office of Water to be acceptable for compliance monitoring under the CWA and SDWA.
Dionex introduced the industry's first RFIC instruments at Pittcon 2003.
Application note 154 can be downloaded from the Dionex website
