Shimadzu Ion Chromatography
Anion Suppressor Ion Chromatograph
In ion chromatography, suppressors are widely used in order to reduce background and noise levels during detection. Suppression of the background yields analyte peak response with greatly enhanced signal to noise –hence higher sensitivity by as much as three orders of magnitude. The newly developed ICDS-40A electrodialytic suppressor for anion analysis features (1) a dialytic membrane suppressor with folded-flow path architecture that minimizes internal volume and peak dispersion (2) continuous, online regeneration and (3) a simple system configuration. Cumbersome and hazardous off-line regeneration is avoided.
The Shimadzu IC equipped with the ICDS-40A suppressor features a slim oven and reduces the benchtop footprint by 40 % for the effective use of laboratory space. This Technical Report bulletin describes the operating principles and features of the ICDS-40A suppressor and the Shimadzu IC.
Many countries and municipalities specify standard values for inorganic anions such as fluoride, chloride, nitrate, nitrite, and sulfate ions in order to minimize the potential health effects of environmental water and drinking water. Suppressed IC is generally used in the quantitation of these inorganic anions. In the United States, Environmental Protection Agency (EPA) Methods 300.0 and 300.1 specify the analysis of inorganic anions in water by ion chromatography (IC). In this article, an EPA 300-compliant quantitative analysis of 7 general inorganic anions in various types of water samples was conducted using the new Shimadzu IC.
Ion chromatography is used widely in the analysis of environmental, industrial, pharmaceuticals, and foods samples. For tap water analysis, the ion chromatograph is used with multiple drinking water quality standards, specified in "Method Determined by the Minister of Health, Labour and Welfare on the Basis of the Ordinance Provisions Relating to Water Quality Standards" (Notification No. 261 issued by the MHLW in 2003, sequential revision). This article introduces an example of anion analysis of tap water based on the above-mentioned Ministerial Notification using a Shimadzu ICDS-40A suppressor unit.
Suppressed conductivity ion chromatography (IC) is commonly used to determine the concentration of inorganic ions, particularly for environmental waters and drinking waters. U.S. National Primary Drinking Water and National Secondary Drinking Water regulations specify the maximum contaminant level (MCL) for a number of common inorganic anions, including fluoride, chloride, nitrate, nitrite and sulfate, to minimize potential health effects from environmental waters and drinking waters. U.S. EPA Methods 300.0 and 300.1 provide details for the determination of inorganic anions in waters by ion chromatography.
Ion chromatography (IC) continues to be the most commonly used chromatographic technique to determine the concentration of inorganic ions in waters. A considerable number of regulatory IC methods exist around the world. EPA Methods 300.0 and 300.1 [1, 2] are two of them. They are validated for the determination of inorganic anions in reagent water, surface water, ground water and finished drinking water. This application note provides two high-resolution IC methods to quantify 10 anions listed in EPA Method 300.1 simultaneously using a Shimadzu modular IC system coupled with a new Shimadzu electrolytically regenerated suppressor, a continuation of work from a previous application note: HPLC-021, The Determination of EPA 300 Anions using Shimadzu Ion Chromatography. The previous application note uses a method optimized for the analysis of the seven common anions (EPA 300 Part A). Provided herein are methods suitable to extend the analysis to include the DBPs.
For environmental water analysis
The example below shows an analysis of river water according to the standard method EPA300.0 (Part A) prescribed by the US Environmental Protection Agency (EPA) for environmental water anion analysis.