Reagent for measurement of concentration of lead, and method for measurement of concentration of lead
AssigneeKowa Company, Ltd.
InventorTakaharu Asano
Life of this patent
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Abstract
To provide a lead concentration determination reagent which realizes accurate, high-sensitivity, and simple-manner determination of the lead ion concentration (also referred to simply as “lead concentration”) of a sample solution in the presence of calcium ions, and a lead concentration determination method employing the reagent. The lead concentration determination reagent contains (A) a water-soluble porphyrin derivative or a salt thereof, (B) at least one member selected from among polyacrylamide, polyvinyl alcohol, and polyethylene glycol, and (C) a calcium-ion-supplying compound.
Claims11
A reagent for determining lead concentration in a sample solution in the presence of calcium ions comprising (A) a water-soluble porphyrin derivative or a salt thereof represented by formula (1):
- wherein at least one of X1 to X4 represents any of the following groups:
- each of the rest of the group(s) represents a hydrogen atom, and
- R1 represents an alkyl group, a sulfoalkyl group, a carboxyalkyl group, a hydroxyalkyl group, or a hydrogen atom;
- and each of R2 and R3 represents a hydroxyl group, a carboxyl group, an amino group, a sulfonic acid residue, a phosphoric acid residue, or a trialkylammonium group, (B) at least one member selected from among polyacrylamide, polyvinyl alcohol, and polyethylene glycol, and (C) a calcium-ion-supplying compound.
Dependencies are inferred from the claim text.