Countermeasures of Reducing the Blank Value of Soluble Cations in Ion Chromatography
Ion chromatography has the characteristics of good selectivity,high sensitivity and convenience,and is commonly used for the determination of anions and cations in environmental monitoring.Natural compounds are mostly composed of a combination of anions and cations,which remain in the laboratory environment along with particles and water.The use of ion chromatography to determine anions and cations often results in high blank values,especially for soluble cations.This article takes the determination of soluble cations Na+,NH4+,K+,Mg2+and Ca2+in water using the DIONEX ICS-900 ion chromatograph as an example,and proposes strategies to reduce the blank value of soluble cations for reference in testing laboratories.
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