| 摘要 |
PURPOSE:To remove nitrite ion affecting a measured value handily and without involving increase in reaction operation step, complication of operation and the like, by adding a specified nitrogen-containing organic compound to a reagent for analysis. CONSTITUTION:One, two or more kinds of a nitrogen-containing organic compounds selected from a group as given by formulas I-IV are added to a reagent for analysis for analyzing. In the formulas, R<1>-R<5> represent sulfonic group, carboxylic group or the like independently and R<6> represents 1-4C alkyl group, 1-4C hydroxy alkyl group or the like. R<7> and R<8> represent 1-4C alkyl group, 1-4C amino alkyl group or the like independently. R<9> represents 1-4C alkyl group or hydrogen atom. R<10>-R<12> represent 1-4C alkyl group or phenyl group. An example of the nitrogen-containing organic compound is m-amino benzoate sodium, p-amino salicylate or the like. An object to be measured is, for example, residual chlorine, chloric ion and trace protein.
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