US2002130081A1PendingUtilityA1

Eluent for ion chromatography for measuring alkaline earth metal ions, and method for analyzing alkaline earth metal ions, employing it

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Priority: Mar 13, 2001Filed: Mar 11, 2002Published: Sep 19, 2002
Est. expiryMar 13, 2021(expired)· nominal 20-yr term from priority
Inventors:Shinji SatoYutaka Ogura
G01N 30/96Y10T436/25875G01N 30/34
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Claims

Abstract

An eluent for ion chromatography for analyzing divalent cations, which comprises an acid and at least one amino acid selected from the group consisting of histidine, lysine and arginine.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . An eluent for ion chromatography for analyzing divalent cations, which comprises an acid and at least one amino acid selected from the group consisting of histidine, lysine and arginine.  
     
     
         2 . The eluent according to  claim 1 , wherein the divalent cations are alkaline earth metal ions.  
     
     
         3 . The eluent according to  claim 1 , wherein the acid is nitric acid, sulfuric acid, phosphoric acid, methanesulfonic acid, oxalic acid, tartaric acid, benzoic acid or phthalic acid.  
     
     
         4 . A method for analyzing cations by ion chromatography employing a cation exchange column, wherein the eluent as defined in  claim 1  is used.

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