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Matrix Elimination Ion Chromatography Method for the Determination of Trace Levels of Anionic Impurities in High Purity Cesium Iodide

Matrix Elimination Ion Chromatography Method for the Determination of Trace Levels of Anionic Impurities in High Purity Cesium Iodide

Ayushi, Sangita D Kumar, A V R Reddy

J Chromatogr Sci. 2012 Jan;50(1):81-3.

PMID: 22291061

Abstract:

In the present study an ion chromatographic method based on matrix elimination has been developed for the determination of anionic impurities in high purity cesium iodide crystals. The presence of impurities has a detrimental effect on the characteristics of detectors based on cesium iodide crystals. In particular, oxygen-containing anions inhibit the resolving power of scintillators and decrease the optical absorption. The quantitative determination of anions (fluoride, chloride, bromide, nitrate, phosphate, and sulphate) simultaneously in the high-purity cesium iodide crystals has not been carried out before. The large concentration of iodide poses a challenge in the determination of anions (especially phosphate and sulphate); hence, matrix elimination is accomplished by adopting a sample pretreatment technique. The method is validated for linearity, accuracy, and precision. The limit of detection for different anions is in the range of 0.3-3 µg/g, and the relative standard deviation is in the range of 4-6% for the overall method.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP7789175	Cesium iodide		7789-17-5	Price

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