Technical Data: Basics of Ion Chromatography - Anion Analysis Edition
IC: Ion Chromatography A beginner-friendly technical booklet that clearly explains the analysis of anions using ion chromatography!
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The purpose for which ion chromatography is used is 60-70% anion analysis. The reason for this is clear: cation analysis, especially for alkali metals and alkaline earth ions, can be easily and accurately measured using atomic absorption spectrometry (AAS) or inductively coupled plasma atomic emission spectrometry (ICP-AES). Ammonium ions can also be easily measured using the indophenol blue spectrophotometric method. However, this is not the case for anions. Even with AAS or ICP-AES, it is not possible to measure halogen ions. The same goes for ions such as nitrate, nitrite, phosphate, and sulfate, which cannot be detected or have low sensitivity, making actual measurement impossible. Fluoride ions, nitrate/nitrite ions, and phosphate ions can be measured with relatively high sensitivity using lanthanum arsenazo complex spectrophotometry, copper/cadmium reduction-naphthyl ethylenediamine spectrophotometry, and molybdenum blue spectrophotometry, respectively. However, these methods are quite cumbersome and take a considerable amount of time for analysis, so they cannot necessarily be considered convenient methods. As for chloride ions and sulfate ions, there are no good methods at all, and silver nitrate titration or gravimetric methods are often used.
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Basics of Ion Chromatography: Anion Analysis Edition
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